CN112282052B

CN112282052B - Double-thread steel column head connection type steel reinforced floor bearing plate-beam-column system and using method thereof

Info

Publication number: CN112282052B
Application number: CN202011166533.9A
Authority: CN
Inventors: 郑龙; 王文达; 史艳莉
Original assignee: Lanzhou University of Technology
Current assignee: Lanzhou University of Technology
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2022-06-10
Anticipated expiration: 2040-10-28
Also published as: CN112282052A

Abstract

The invention relates to the field of structural engineering, in particular to a double-thread steel column head connection type steel floor support plate-beam-column system and a using method thereof. The steel column comprises a steel column head with an inner ring thread, a steel column head steel beam with an inner ring thread, a steel rib combined floor bearing plate arranged at the bottom of a steel column head with an outer ring thread, a steel template at the outer side of a steel column head with an outer ring thread, a large hexagon nut for fixing the steel column head with an outer ring thread, a cylindrical nut for fixing the steel column head with an inner ring thread and an outer ring thread, a hinged connecting plate, a bolt group for connecting the steel rib and the hinged connecting plate, and a bolt group for connecting the hinged connecting plate and the steel beam. Compared with the traditional plate beam column structure, the invention has no on-site welding, less wet operation and strong connection performance, and is a novel assembly type integrated structure system with the assembly rate of 90 percent.

Description

Double-thread steel column head connection type steel-reinforced floor support plate-beam-column system and using method thereof

Technical Field

The invention relates to the field of structural engineering, in particular to a double-thread steel column head connection type steel floor support plate-beam-column system and a using method thereof.

Background

In the last two decades, the rapid development of the building manufacturing industry in China makes a great contribution to economic prosperity and social progress. However, the rapid development of the construction industry also causes waste of resources and destruction of the environment to some extent. Therefore, the national advocates guidelines for strongly advocating green fabricated buildings in order to solve a series of problems caused by the construction industry, such as excessive resource exploitation, natural environment destruction, and poor construction site environment. From 9 months in 2016, areas are mainly pushed by three city groups of Jingjin Ji, Long triangular and Zhu triangular, other cities with the population exceeding 300 million are actively pushed, and other cities are encouraged to push the areas, so that prefabricated buildings such as prefabricated concrete structures, steel structures, modern wood structures and the like can be developed according to local conditions. The force contends for about 10 years, so that the proportion of the assembly type building occupying the newly-built building area reaches 30 percent. The total value of the building industry in 2019 is 24.84 trillions, which means that the assembled building will have a value of at least 8 trillions each year in the future. In addition, the integrated design of the assembly type building is carried out, the collaborative design capability of all specialties in the building field is improved, and the joint development of the assembly type building design technology by design units, scientific research institutions, universities and the like is encouraged. That is, the design of new fabricated buildings will be critical within the next 10 years.

The assembled steel structure is used as a light structure with the most reasonable stress, the highest assembly rate and the widest applicability in the assembled structure, and can be widely applied to various large and medium-sized public buildings and multi-high-rise civil houses, and also can be used for dominantly occupying industrial and agricultural plants and temporary buildings. The assembled steel structure plays a very important role in various future projects in the construction industry. The existing assembled steel structure mainly comprises: the beam-column steel structure frame, the beam-column steel structure frame-supporting structure, the portal rigid frame structure, the truss structure and other structural forms. The fabricated steel structure of the above category often considers only the fabricated connection structure of the frame structure itself, but neglects the fabricated connection of the floor slab, so that the concrete floor slab is subjected to wet construction in a post-cast manner. Therefore, the assembly rate of the assembly type steel structure is reduced, the construction period is prolonged, and unstable factors such as poor connection quality and high danger of the structure can be caused.

In the existing fabricated floor slab-beam-column steel structure system, after the beam-column system completes fabricated construction, the construction of the floor slab is often carried out by adopting three modes: firstly, building a template, welding studs on a steel beam, manufacturing and placing a reinforcing mesh, and pouring a concrete floor slab; secondly, placing and welding profiled steel sheets, manufacturing and placing reinforcing mesh, welding studs on the profiled steel sheets and the steel beams, and pouring a concrete floor slab; and thirdly, placing the steel truss floor bearing plate, welding studs on the galvanized steel plate and the steel beam, and pouring a concrete floor slab. However, the first floor construction process is the lowest construction efficiency among the three, and compared with the latter two, the construction of the template is unnecessary, and the reinforced concrete floor is larger in thickness and poorer in connection performance with the steel beam; in the second floor construction process, profiled steel plates need to be welded on site, certain fire risk exists, the profiled steel plates are often welded by spot welding, the connection performance is poor, meanwhile, the profiled steel plates and steel beams are connected only through full penetration studs, the anti-sliding performance is weak, and according to the past engineering experience, if the connection damage at the place is caused by disasters such as earthquake, the great risk is brought; the second floor construction process is similar to the second floor construction process, and the only improvement is that the steel bar truss net and the galvanized steel plate can be prefabricated in a factory, so that the construction efficiency is increased, the assembly rate is improved, but the problems that the spot welding and welding of the galvanized steel plate on site has the fire risk, the connection between the galvanized steel plates is poor and the like are solved, and meanwhile, the connection capacity between the galvanized steel plate and the steel beam is poor. In addition, the common defects of the three common floor construction procedures are as follows: 1, the construction risk of a floor slab is high, personnel are easily injured due to concrete pouring, and fire disasters and the like are easily caused due to field welding; 2. the construction efficiency is low, the construction efficiency of the floor in-situ pouring is not easy to control, and the floor construction needs layer by layer construction, so that the construction period is too long; 3. the construction process quality is low, when the non-assembly type floor slab is constructed, the connection capability of the whole floor slab and a steel beam is poor, and the stud welding accuracy and stability are not easy to control; 4. the environmental pollution is serious, the pollution and the garbage are difficult to control in the concrete cast-in-place, and the urban environment and the road surface are damaged due to the transportation of wet operation construction equipment; 5. the cost is high, and a large amount of human resources and material cost are consumed in wet operation.

Under the background, a floor bearing plate-beam-column assembly type steel structure system which is high in construction efficiency, assembly rate and construction risk, low in assembly difficulty, high in quality, strong in connection performance of all parts, energy-saving, environment-friendly and cost-saving needs to be designed, and references are provided for a design method and a construction process of an assembly type steel structure system in the field of building engineering.

Disclosure of Invention

The invention aims to provide a double-thread steel column head connection type steel rib floor deck-beam-column system.

The double-threaded steel column head connection type steel rib floor bearing plate-beam-column system comprises a steel tube column with an inner ring threaded steel column head, a steel beam with an inner ring threaded steel column head, a steel rib combined floor bearing plate with an outer ring threaded half-wrapped steel column head, a steel template outside the outer ring threaded half-wrapped steel column head, a large hexagon nut for fixing the outer ring threaded steel column head, a cylindrical nut for fixing the inner ring threaded steel column head and the outer ring threaded steel column head, a hinged connecting plate, a bolt group for connecting the steel rib and the hinged connecting plate, and a bolt group for connecting the hinged connecting plate and the steel beam;

the steel column head steel pipe column with the inner ring thread and the column head steel beam with the inner ring thread are connected to form a beam column framework, the steel rib combined floor support plate with the bottom of the steel column head with the outer ring thread and the steel column head outer side steel template with the outer ring thread are assembled on the beam column framework formed by the steel column head steel pipe column with the steel column head with the inner ring thread and the column head steel beam with the inner ring thread through a large hexagon nut for fixing the steel column head with the outer ring thread and a cylindrical nut for fixing the steel column head with the inner ring thread, and the T-shaped steel rib at the bottom of the steel column head combined floor support plate with the outer ring thread is hinged and connected to the steel column head steel beam with the inner ring thread through a hinged connecting plate, a connecting steel rib and hinged connecting plate bolt group, and a connecting hinged connecting plate and a steel beam bolt group.

The beneficial effects of the invention are as follows:

1. the invention provides a double-thread steel column head connection type steel floor deck-beam-column system, which is a novel assembly type integrated steel structure system with the assembly rate of more than 90%.

2. The double-thread steel column head connection type steel rib floor support plate-beam-column system provided by the invention can be used for emergency buildings in emergency situations, and can simultaneously meet the strict requirements of higher building quality and faster construction speed. The double-thread steel column head connection type steel floor support plate-beam-column system strengthens the connection between the floor support plate and the beam column on the basis of the traditional beam column system, and in addition, the steel ribs arranged at the bottom of the floor support plate greatly improve the integrity and the stability of the floor support plate, so that the novel system not only structurally but also provides higher building quality in use comfort. The construction speed is faster, the double-threaded steel column head connection type steel floor bearing plate-beam-column system is an assembly type novel system with higher assembly rate in the traditional beam-column system, the factory prefabrication rate of the beam-plate-column is higher, no welding engineering is needed in the construction process, the cast-in-place quantity of concrete is extremely small, and the construction speed is further greatly improved.

3. The traditional assembled steel structure only considers the assembled connection structure of a frame structure and neglects the assembled connection of a floor slab, but the double-thread steel column head connection type steel reinforced floor bearing plate-beam-column system provided by the invention emphasizes the connection of the floor bearing plate, a steel beam and a steel column, and has strong connection performance and high connection stability.

4. The traditional reinforced concrete floor slab, the profiled steel sheet composite floor slab and the steel bar truss floor slab have more on-site welding projects, so that the construction site has larger environmental pollution, and the on-site welding is easy to cause fire, so that unstable factors exist.

5. The cast-in-place concrete quantity of the traditional reinforced concrete floor slab, the profiled steel sheet composite floor slab and the steel bar truss floor bearing plate is large, the construction efficiency is low, the construction period is too long, and the waste of personnel in wet operation is serious, while the cast-in-place quantity of the double-thread steel column head connection type steel reinforced floor bearing plate-beam-column system provided by the invention is extremely small, compared with the traditional cast-in-place floor slab, the cast-in-place concrete quantity in the construction process of the invention is at least reduced by 80%, the construction period is greatly shortened, compared with the traditional beam-plate-column system, the construction period of the invention is at least reduced by 85%, and the unnecessary waste of personnel is also avoided.

6. The traditional reinforced concrete floor slab, profiled steel sheet combined floor slab and steel bar truss floor support plate cause serious environmental pollution in the construction process, the concrete cast-in-place is difficult to control pollution and rubbish, and the transportation of wet operation construction equipment causes the damage of urban environment and road surface.

7. The steel beam of the traditional profiled steel plate combined floor slab and steel bar truss floor slab needs to be welded with studs on the profiled steel plate or galvanized steel plate to connect steel beams, so that the connection between the steel beams and the floor slab is weaker, but the ' double insurance ' of the connection between the steel beam of the double-threaded steel column head connection type steel floor slab-beam-column system provided by the invention and the bolt connection between the steel beam and the steel beam at the bottom of the floor slab enables the floor slab and the steel beams to be tightly connected, not only does the connection between the steel beam column head transversely arranged on the steel pipe column enables the floor slab and the steel pipe column to be connected, so that the beam column frame consisting of the floor slab and the steel beam-steel pipe column is fully connected, the floor slab has excellent pulling resistance, bending resistance and earthquake resistance, wherein the pulling resistance and the earthquake resistance both meet the design and construction specifications (CECS 273:2010) of the combined floor slab, and the earthquake resistance can reach ' small earthquake resistance, medium earthquake resistance and repairability, The performance standard of the earthquake-resistant steel.

8. The traditional profiled steel sheet composite floor slab and the steel bar truss floor slab are connected by spot welding between adjacent profiled steel sheets or galvanized steel sheets, the double-thread steel column head connection type steel slab floor slab-beam-column system provided by the invention adopts modular connection, the floor slab steel bottom plates on different parts are connected in a vertical and transverse double-thread steel column head connection mode of steel beams and steel columns, the connection strength is ensured, and the connection strength between different modules is further enhanced by the connection between the steel ribs and the steel beams arranged at the bottom of the adjacent floor slab.

9. The secondary beam is required to be considered in the traditional steel and concrete frame structure, the floor support plate bottom-arranged steel rib of the double-thread steel column head connection type steel rib floor support plate-beam-column system provided by the invention can replace the secondary beam, the connection strength of the floor support plate bottom-arranged steel rib and the steel beam is between semi-rigid and hinged connection, and the connection strength can be adjusted according to the design requirement and has no difference with the function of the secondary beam.

10. The invention provides a double-threaded steel column head design of a traditional reinforced concrete floor slab, a profiled steel sheet composite floor slab and a steel bar truss floor slab, wherein a steel structure is connected with a concrete slab through studs, a fixed outer ring threaded steel column head large hexagon nut and a fixed inner ring and outer ring threaded steel column head cylindrical nut are arranged on an outer ring threaded steel column head, the shape and the size after combination are larger than those of common studs, and the bonding slippage performance between a steel member and concrete is greatly improved.

11. The double-thread steel column head connection type steel-reinforced floor bearing plate-beam-column system provided by the invention is not only suitable for common civil and public assembled steel structure buildings, industrial and agricultural workshops and the like, but also suitable for major emergency buildings, temporary buildings and the like due to high construction efficiency, high assembly speed and convenience in disassembly, and has wide development potential.

Drawings

FIG. 1 is a schematic view of the present invention in assembled form;

FIG. 2 is a schematic view of the installation of a steel pipe column with an internal ring thread steel column head and a steel beam with an internal ring thread steel column head;

FIG. 3 is a schematic view of the installation of the steel rib combined floor support plate with the bottom of the steel column head covered with the thread of the external ring;

FIG. 4 is a schematic view of mounting a steel formwork on the outer side of a steel column head of a half-wrapped steel column with external ring threads;

FIG. 5 is a schematic view of a large hexagonal nut for fixing an outer ring threaded steel stud;

FIG. 6 is a schematic view of a cylindrical nut with a threaded steel stud secured to the inner and outer rings;

FIG. 7 is a schematic view of a hinged connection plate;

FIG. 8 is a schematic view of the bolt group connecting the steel rib and the hinge connection plate;

FIG. 9 is a schematic view of a bolt group connecting the hinge connection plate and the steel beam;

FIG. 10 is a schematic view of a steel column head of the steel column of FIG. 2 with a threaded inner ring transversely disposed;

FIG. 11 is a schematic view of a steel column head with a vertically arranged inner ring and a thread on the steel beam in FIG. 2;

FIG. 12 is a schematic view of a cross-threaded steel column half-wrapped with outer threads of the composite floor deck of FIG. 3;

FIG. 13 is a schematic view of the assembled floor deck of FIG. 3 with a vertically disposed outer ring threaded steel column half-clad;

FIG. 14 is a schematic view of the outer steel form of FIG. 4 with a threaded steel column head half-wrapped in cross-section;

FIG. 15 is a schematic view of the outer steel form in FIG. 4 with a vertically disposed outer ring threaded semi-wrapped steel column head;

FIG. 16 is a schematic view of the assembly position of the steel rib combined floor support plate with the bottom of the steel-clad column head having the external thread;

FIG. 17 is a schematic view of the assembly position of the steel formwork at the outer side of the semi-wrapped steel column head with the external thread;

FIG. 18 is a schematic view of the assembly of the bottom steel reinforced composite floor deck with the externally threaded half-clad steel column head at the bottom steel reinforced position;

FIG. 19 is a schematic view of the assembly of the steel reinforced composite floor support plate with the steel column head and the bottom of the steel column with the thread and the outer ring at the inner column;

FIG. 20 is a schematic view of the assembly of a steel skeleton combined floor support plate with a bottom-mounted steel column head with an external thread and a steel form plate with an external thread and a bottom-mounted steel column head with an external thread at a side column;

FIG. 21 is a schematic view of the assembly of a steel skeleton combined floor support plate with a bottom-mounted steel column head with an external thread and a steel form plate with an external thread and a bottom-mounted steel column head with an external thread at an angle column;

FIG. 22 is a schematic view of the connection principle of the double-threaded steel column head connection type steel-reinforced floor deck-beam-column system according to the present invention;

FIG. 23 is a schematic view of the position of post-cast concrete of the double-threaded steel column head connection type steel floor deck-beam-column system according to the present invention;

reference numerals and corresponding names: 1-steel pipe column with steel column head with internal thread, 1-steel pipe column, 1-2-steel pipe column head with internal thread, 2-steel beam with steel column head with internal thread, 2-1-steel beam, 2-steel beam with internal thread, 2-3-steel beam with screw hole reserved in span, 3-steel combined floor support plate with steel column head with external thread, 3-1-steel bottom plate of combined floor support plate, 3-2-steel angle with square hole reserved, 3-T-shaped steel rib with screw hole reserved, 3-4-steel column head with external thread, 3-5-steel column head with external thread, 3-6-prefabricated reinforced concrete plate, 4-steel template outside steel column head with external thread, 4-1-steel bottom plate of external steel template, 4-2-outer steel template vertical steel plate, 4-3-reserved square hole vertical steel plate, 4-outer steel template horizontal outer ring threaded semi-wrapped steel column cap, 4-5-outer steel template vertical outer ring threaded semi-wrapped steel column cap, 5-fixed outer ring threaded steel column cap large hexagon nut, 6-fixed inner and outer ring threaded steel column cap cylindrical nut, 6-1-fixed outer ring threaded steel column cap cylindrical nut, 6-2-fixed inner ring threaded steel column cap cylindrical nut, 7-hinged connecting plate, 7-1-angle steel plate, 7-2-reserved screw hole of connecting plate corresponding to reserved screw hole in steel beam span, 7-3-reserved screw hole of connecting plate corresponding to reserved screw hole of T-shaped steel beam, 8-connecting steel bar and hinged connecting plate bolt group, and 9-connecting hinged connecting plate and steel beam bolt group.

Detailed Description

The specific implementation process of the invention is explained in detail with the attached drawings:

as shown in fig. 1 to 9, the invention relates to a double-threaded steel column head connection type steel reinforced floor bearing plate-beam-column system, which comprises a steel pipe column 1 with an inner-ring threaded steel column head, a steel beam 2 with an inner-ring threaded steel column head, a steel reinforced combined floor bearing plate 3 arranged at the bottom of a half-covered steel column head with an outer-ring threaded steel column, a steel template 4 arranged at the outer side of the half-covered steel column head with an outer-ring threaded steel column head, a large hexagon nut 5 for fixing the outer-ring threaded steel column head, a cylindrical nut 6 for fixing the inner-ring threaded steel column head and the outer-ring threaded steel column head, a hinged connecting plate 7, a connecting steel rib and hinged connecting plate bolt group 8, and a connecting hinged connecting plate and steel beam bolt group 9;

as shown in fig. 1, an internally-coiled threaded steel column-head steel pipe column 1 and an internally-coiled threaded steel column-head steel beam 2 are connected to form a beam-column framework, a bottom steel-rib combined floor support plate 3 with an externally-coiled threaded half-wrapped steel column head and an outside steel mold plate 4 with an externally-coiled threaded half-wrapped steel column head are assembled on the beam-column framework formed by the internally-coiled threaded steel column-head steel pipe column 1 and the internally-coiled threaded steel column-head steel beam 2 through a large hexagon nut 5 for fixing the externally-coiled threaded steel column head and a cylindrical nut 6 for fixing the internally-coiled threaded steel column head, and a bottom T-shaped steel rib of the externally-coiled threaded half-wrapped steel column-head bottom steel-rib combined floor support plate 3 is hinged to the internally-coiled steel column head steel beam 2 through a hinged connecting plate 7, a connecting steel rib and hinged connecting plate bolt group 8, a connecting plate and a steel beam bolt group 9;

as shown in fig. 2, the steel pipe column 1 with the inner ring thread steel column head comprises a steel pipe column 1-1 and a steel pipe column horizontal inner ring thread steel column head 1-2, the steel pipe column horizontal inner ring thread steel column head 1-2 is welded to the steel pipe column 1-1, and the steel pipe column horizontal inner ring thread steel column head 1-2 is screwed into the steel pipe columnThe welding height of the deformed steel column head 1-2 is H_1-21 steel pipe column transverse inner ring threaded steel column head 1-2 is welded on the periphery of each steel pipe column 1-1 at the position of the inner column, 1 steel pipe column 1-1 at the position of the side column is welded on each of three sides of the steel pipe column 1-1 close to the middle column, 1 steel pipe column transverse inner ring threaded steel column head 1-2 is welded on each of two sides of the steel pipe column 1-1 at the position of the corner column close to the middle column, and 1 steel pipe column transverse inner ring threaded steel column head 1-2 is welded on each of two sides of the steel pipe column 1-1 at the position of the corner column;

as shown in fig. 2, the steel beam 2 with the steel column head with the inner ring thread comprises a steel beam 2-1, a steel beam vertical inner ring thread steel column head 2-2, and a screw hole 2-3 reserved in the span of the steel beam, wherein the steel beam vertical inner ring thread steel column head 2-2 is longitudinally welded to an upper flange of the steel beam 2-1 along a row, and the welding distance of the steel beam vertical inner ring thread steel column head 2-2 is L_2-2The reserved screw holes 2-3 in the steel beam span are 2 rows of 3 rows of bolt holes in the steel beam 2-1 span, and the bolt hole diameter of the reserved screw holes 2-3 in the steel beam span is D_2-3；

As shown in figure 3, the steel rib combined floor bearing plate 3 with the bottom of the steel column head with the outer ring thread half-wrapped comprises a combined floor bearing plate steel bottom plate 3-1, reserved square hole vertical angle steel 3-2, reserved screw hole T-shaped steel ribs 3-3, a combined floor bearing plate transversely-arranged steel column head with the outer ring thread half-wrapped 3-4, a combined floor bearing plate vertically-arranged steel column head with the outer ring thread half-wrapped 3-5 and prefabricated reinforced concrete plates 3-6, a row of square holes are reserved around the combined floor bearing plate steel bottom plate 3-1, and the square hole of the combined floor bearing plate steel bottom plate 3-1 has the aperture D_3-1The square hole interval L of the steel bottom plate 3-1 of the combined floor bearing plate_3-1Welding distance L of inner ring deformed steel column head 2-2 vertically arranged with steel beam_2-2Are equal, i.e. L_3-1=L_2-2Square holes are reserved at two ends of the angle steel of the reserved square-hole vertical angle steel 3-2, and the aperture of the square hole of the reserved square-hole vertical angle steel 3-2 is D_3-2The height H of the center of the square hole of the reserved square hole vertical angle steel 3-2_3-2Welding height H of threaded steel column head 1-2 of inner ring transversely arranged with steel pipe column_1-2In agreement, i.e. H_3-2=H_1-2The reserved square hole vertical angle steel 3-2 is welded to four corners of a combined floor support plate steel base plate 3-1, 4 reserved square hole vertical angle steel 3-2 are welded on 1 combined floor support plate steel base plate 3-1, 1 row of 3 rows of bolt holes are reserved at two ends of the reserved screw hole T-shaped steel rib 3-3The diameter of the bolt hole of the T-shaped steel rib 3-3 of the reserved screw hole is D_3-3The T-shaped steel rib 3-3 with the reserved screw hole is welded to the middle lower end of the steel bottom plate 3-1 span of the combined floor support plate, the transversely-arranged outer ring threaded semi-wrapped steel column head 3-4 of the combined floor support plate is welded to the reserved square hole of the reserved square hole vertical angle steel 3-2, and the transversely-arranged outer ring threaded semi-wrapped steel column head 3-4 of the combined floor support plate is welded at the height H_3-4Welding height H of threaded steel column head 1-2 of inner ring transversely arranged with steel pipe column_1-2In agreement, i.e. H_3-4=H_1-2=H_3-21 vertical angle steel 3-2 with reserved square holes is welded with 2 horizontal outer ring threaded semi-wrapped steel column heads 3-4 of the combined floor bearing plate, the vertically arranged outer ring threaded semi-wrapped steel column heads 3-5 of the combined floor bearing plate are longitudinally welded with the reserved square holes on the periphery of a steel bottom plate 3-1 of the combined floor bearing plate, and the welding distance L of the vertically arranged outer ring threaded semi-wrapped steel column heads 3-5 of the combined floor bearing plate_3-5Welding distance L of inner ring deformed steel column head 2-2 vertically arranged with steel beam_2-2Coincidence, i.e. L_3-5=L_2-2The prefabricated reinforced concrete plate 3-6 is poured above the steel bottom plate 3-1 of the combined floor bearing plate;

as shown in figure 4, the outer steel formwork 4 with the outer ring threaded semi-clad steel column head comprises an outer steel formwork steel bottom plate 4-1, an outer steel formwork vertical steel plate 4-2, a reserved square hole vertical steel plate 4-3, an outer steel formwork horizontal outer ring threaded semi-clad steel column head 4-4 and an outer steel formwork vertical outer ring threaded semi-clad steel column head 4-5, a row of square holes is reserved on one side of the outer steel formwork steel bottom plate 4-1, and the square hole interval L of the outer steel formwork steel bottom plate 4-1_4-1Welding distance L of inner ring deformed steel column head 2-2 vertically arranged with steel beam_2-2Are equal, i.e. L_4-1=L_2-2The outer steel template vertical steel plate 4-2 is welded to the other side of the reserved square hole of the outer steel template steel bottom plate 4-1, a square hole is reserved at one end of the reserved square hole vertical steel plate 4-3, and the diameter D of the square hole of the reserved square hole vertical steel plate 4-3 is larger than that of the square hole of the reserved square hole vertical steel plate 4-3_4-3Square holes D are reserved around the steel bottom plate 3-1 of the combined floor bearing plate_3-1Coincidence, i.e. D_4-3=D_3-1The height H of the center of the square hole of the reserved square hole vertical steel plate 4-3_4-3Welding height H of threaded steel column head 1-2 of inner ring transversely arranged with steel pipe column_1-2Coincidence, i.e. H_4-3=H_1-2The reserved square-hole vertical steel plate 4-3 is welded to two ends of an outer-side steel template steel bottom plate 4-1, 1 outer-side steel template steel bottom plate 4-1 is welded with 1 outer-side steel template vertical steel plate 4-2 and 2 reserved square-hole vertical steel plates 4-3, the outer-side steel template transverse outer-ring threaded semi-clad steel column head 4-4 is welded to a reserved square-hole of the reserved square-hole vertical steel plate 4-3, and the outer-side steel template transverse outer-ring threaded semi-clad steel column head 4-4 is welded at a height H_4-4Welding height H of threaded steel column head 1-2 of inner ring transversely arranged with steel pipe column_1-2Coincidence, i.e. H_4-4=H_1-2=H_4-31 vertical steel plate with reserved square hole 4-3 is welded with 1 horizontal outer ring thread semi-clad steel column head 4-4 of outer side steel template, the outer side steel template is vertically welded with the outer ring thread semi-clad steel column head 4-5 to a column of square holes of the outer side steel template steel bottom plate 4-1 along the longitudinal direction, and the outer side steel template is vertically welded with the welding interval L of the outer ring thread semi-clad steel column head 4-5_4-5Welding distance L of inner ring deformed steel column head 2-2 vertically arranged with steel beam_2-2Coincidence, i.e. L_4-5=L_2-2=L_4-1；

As shown in fig. 5, the fixed outer-ring screw steel stud large hexagonal nut 5 is a large hexagonal nut with a thread size of an outer ring screw, and the screw hole size of the fixed outer-ring screw steel stud large hexagonal nut 5 is D₅The height of the screw hole of the large hexagonal nut 5 for fixing the outer ring threaded steel column cap is H₅The thread size of the large hexagon nut 5 for the fixed outer ring threaded steel column cap is matched with the outer ring thread size of a combined floor support plate horizontal outer ring threaded half-wrapped steel column cap 3-4, a combined floor support plate vertical outer ring threaded half-wrapped steel column cap 3-5, an outer steel template horizontal outer ring threaded half-wrapped steel column cap 4-4 and an outer steel template vertical outer ring threaded half-wrapped steel column cap 4-5, the large hexagon nut 5 for the fixed outer ring threaded steel column cap is used for fastening the combined floor support plate horizontal outer ring threaded half-wrapped steel column cap 3-4, the combined floor support plate vertical outer ring threaded half-wrapped steel column cap 3-5, the outer steel template horizontal outer ring threaded half-wrapped steel column cap 4-4 and the outer steel template vertical outer ring threaded half-wrapped steel column cap 4-5;

as shown in fig. 6, the fixed cylindrical nut 6 for the steel column head with the inner and outer circles comprises a cylindrical nut 6-1 for the steel column head with the fixed outer circle and a cylindrical nut 6-1 for the steel column head with the fixed inner circle and a fixed outer circleThe cylindrical nut 6-2 is arranged on the column head of the ring-thread steel column, the cylindrical nut 6-1 for fixing the outer ring-thread steel column head is a circular nut with the thread size of the outer ring thread, and the screw hole size of the cylindrical nut 6-1 for fixing the outer ring-thread steel column head is D_6-1The height of the screw hole of the cylindrical nut 6-1 for fixing the outer ring threaded steel column head is H_6-1The thread size of the cylindrical nut 6-1 of the fixed outer ring threaded steel column head is matched with the outer ring threads of the cylindrical nut 6-1 of the fixed outer ring threaded steel column head, which is used for fastening a horizontally-arranged outer ring threaded semi-wrapped steel column head 3-4 of a combined floor deck, a vertically-arranged outer ring threaded semi-wrapped steel column head 3-5 of the combined floor deck, a horizontally-arranged outer ring threaded semi-wrapped steel column head 4-4 of an outer side steel template and a vertically-arranged outer ring threaded semi-wrapped steel column head 4-5 of an outer side steel template, the cylindrical nut 6-1 of the fixed outer ring threaded steel column head is used for fastening the horizontally-arranged outer ring threaded semi-wrapped steel column head 3-4 of the combined floor deck, the vertically-arranged outer ring threaded semi-wrapped steel column head 3-5 of the combined floor deck, the horizontally-arranged outer ring threaded semi-wrapped steel column head 4-4 of the outer side steel template and the vertically-arranged outer ring threaded semi-wrapped steel column head 4-5 of the outer side steel template, the cylindrical nut 6-2 for fixing the steel column head with the inner ring threads is a circular nut with the threads of the inner ring threads, and the size of the screw hole for fixing the cylindrical nut 6-2 for fixing the steel column head with the inner ring threads is D_6-2The height of the screw hole for fixing the cylindrical nut 6-2 at the head of the steel column with the inner ring threads is H_6-2The thread size of the cylindrical nut 6-2 for fixing the steel column head with the inner ring threads is matched with the inner ring threads of the cylindrical nut 6-2 for fixing the steel column head with the inner ring threads, which are used for fastening the steel column head with the inner ring threads 1-2 transversely arranged on the steel column, and the cylindrical nut 6-2 for fixing the steel column head with the inner ring threads, which is used for fastening the steel column head with the inner ring threads 1-2 transversely arranged on the steel column and the steel beam head with the inner ring threads 2-2 vertically arranged on the steel beam;

as shown in fig. 7, the hinge connection plate 7 comprises an angle steel plate 7-1, connection plate reserved screw holes 7-2 corresponding to the reserved screw holes in the steel beam span, connection plate reserved screw holes 7-3 corresponding to the reserved screw holes in the T-shaped steel frame, the connection plate reserved screw holes 7-2 corresponding to the reserved screw holes in the steel beam span are 1 row of 3 rows of reserved bolt holes corresponding to the reserved screw holes 2-3 in the steel beam span, and the bolt hole diameter D of the connection plate reserved screw holes 7-2 corresponding to the reserved screw holes in the steel beam span_7-2Bolt hole diameter D of reserved screw hole 2-3 in span with steel beam_2-3Equal, i.e. D_7-2=D_2-3(ii) a The reserved connecting plate screw holes 7-3 corresponding to the reserved T-shaped steel bone screw holes are 1 row of 3 rows of reserved screw holes corresponding to the reserved screw holes of the reserved T-shaped steel bone 3-3, and the bolt hole diameter D of the reserved connecting plate screw holes 7-3 corresponding to the reserved T-shaped steel bone screw holes_7-3And the bolt aperture D of the T-shaped steel rib 3-3 of the reserved screw hole_3-3Equal, i.e. D_7-3=D_3-3；

As shown in FIG. 8, the connecting steel rib and hinge connecting plate bolt group 8 is a 1-column 3-row bolt group connecting a reserved screw hole T-shaped steel rib 3-3 and a reserved screw hole 7-3 of the connecting plate corresponding to the reserved screw hole of the T-shaped steel rib, and the bolt diameter D of the connecting steel rib and hinge connecting plate bolt group 8₈Slightly smaller than the screw hole diameter D of the T-shaped steel rib 3-3 connecting the reserved screw hole and the reserved screw hole 7-3 of the connecting plate corresponding to the reserved screw hole of the T-shaped steel rib₈＜D_7-3=D_3-3；

As shown in fig. 9, the connecting hinge connection plate and steel beam bolt group 9 is a 2-row 3-row bolt group for connecting a connection plate reserved screw hole 7-2 corresponding to a reserved screw hole in a steel beam span and a steel beam span reserved screw hole 2-3, and the bolt diameter D of the connecting hinge connection plate and steel beam bolt group 9₉Slightly smaller than the screw hole diameters of the connecting plate reserved screw hole 7-2 corresponding to the steel beam midspan reserved screw hole and the steel beam midspan reserved screw hole 2-3, namely D₉＜D_7-2=D_2-3；

As shown in fig. 10, the head top end of the steel-pipe column transverse inner-ring thread steel head 1-2 is provided with an inner-ring thread, and the outer diameter D of the inner-ring thread at the head top end of the steel-pipe column transverse inner-ring thread steel head 1-2 is_1-2Dimension D of screw hole for fixing cylindrical nut 6-2 of steel column head with inner ring threads_6-2Equal, i.e. D_1-2=D_6-2The screw hole height H of the inner ring thread at the top end of the steel column head 1-2 with the inner ring thread at the horizontal inner ring of the steel column head_1-2The height H of the screw hole for fixing the cylindrical nut 6-2 of the steel column head with the inner ring thread_6-2Equal, i.e. H_1-2=H_6-2The side length of the square column of the threaded steel column head 1-2 of the transverse inner ring of the steel pipe column is d_1-2The steel pipe columnThe height of the square column of the transverse inner ring screw thread steel column cap 1-2 is h_1-2；

As shown in fig. 11, the top end of the column head of the steel beam vertically-arranged inner-ring thread steel column head 2-2 is provided with an inner-ring thread, and the outer diameter D of the inner-ring thread at the top end of the column head of the steel beam vertically-arranged inner-ring thread steel column head 2-2 is provided with an inner-ring thread_2-2Dimension D of screw hole for fixing cylindrical nut 6-2 of steel column head with inner ring threads_6-2Equal, i.e. D_2-2=D_6-2The steel beam is vertically provided with the thread height H of the inner ring thread at the top end of the column head of the inner ring thread steel column head 2-2_2-2The height H of the screw hole for fixing the cylindrical nut 6-2 of the steel column head with the inner ring thread_6-2Equal, i.e. H_2-2=H_6-2The side length of the square column of the threaded steel column head 2-2 with the inner ring vertically arranged on the steel beam is d_2-2The height of the square column of the steel beam vertically-arranged inner ring deformed steel column head 2-2 is h_2-2；

As shown in fig. 12, the horizontal outer ring threaded half-wrapped steel column cap 3-4 of the combined floor support plate is divided into two parts, namely a threaded side and a non-threaded side, the threaded side of the horizontal outer ring threaded half-wrapped steel column cap 3-4 of the combined floor support plate is provided with outer ring threads, and the outer diameter D of the outer ring threads of the horizontal outer ring threaded half-wrapped steel column cap 3-4 of the combined floor support plate is_3-4And the size D of the screw hole for fixing the large hexagon nut 5 with the outer ring screw-thread steel column cap₅And the size D of the screw hole for fixing the cylindrical nut 6-1 with the outer ring threaded steel column head_6-1Equal, i.e. D_3-4=D₅=D_6-1The thread height H of the outer ring thread of the semi-wrapped steel column cap 3-4 of the outer ring thread of the horizontal outer ring of the combined floor bearing plate_3-4Equal to the height h of a square column of a threaded steel column head 1-2 of a transverse inner ring of the steel pipe column_1-2I.e. H_3-4=h_1-2The thread height H of the outer ring threads of the 3-4 outer ring threads of the combined floor bearing plate horizontal outer ring threads of the semi-wrapped steel column cap_3-4Is greater than the height H of the screw hole of the big hexagonal nut 5 for fixing the external ring screw thread steel column cap₅The height H of the screw hole of the cylindrical nut 6-1 with the outer ring threaded steel column cap is fixed_6-1Sum, i.e. H_3-4＞H₅+H_6-1In order to ensure that the horizontal outer ring threaded semi-wrapped steel column head 3-4 of the combined floor support plate is completely jointed with the horizontal inner ring threaded steel column head 1-2 of the steel pipe column, the horizontal outer ring threaded semi-wrapped steel column head of the combined floor support plateThe non-threaded side of the column cap 3-4 is an inwards concave rectangular column, and the short edge length d of the combined floor bearing plate transversely-arranged outer ring threaded semi-wrapped steel column cap 3-4_s-3-4Is the length of the long side d_l-3-40.5 times of the length of the long edge of the horizontal outer ring thread semi-wrapped steel column head 3-4 concave rectangular column of the combined floor bearing plate_l-3-4Side length d of square column of threaded steel column head 1-2 of inner ring transversely arranged with steel pipe column_1-2Equal, i.e. d_s-3-4=0.5d_l-3-4=0.5d_1-2；

As shown in fig. 13, the vertically arranged outer ring threaded semi-wrapped steel column cap 3-5 of the combined floor support plate is divided into a threaded side and a non-threaded side, the threaded side of the vertically arranged outer ring threaded semi-wrapped steel column cap 3-5 of the combined floor support plate is provided with outer ring threads, and the outer diameter D of the outer ring threads of the vertically arranged outer ring threaded semi-wrapped steel column cap 3-5 of the combined floor support plate_3-5And the size D of the screw hole for fixing the large hexagon nut 5 with the outer ring screw-thread steel column cap₅And the size D of the screw hole for fixing the cylindrical nut 6-1 with the outer ring threaded steel column head_6-1Equal, i.e. D_3-5=D₅=D_6-1The thread height H of the outer ring thread of the semi-wrapped steel column cap 3-5 with the outer ring thread vertically arranged on the combined floor bearing plate_3-5Equal to the height h of the square column with the steel beam vertically arranged inner ring deformed steel column head 2-2_2-2I.e. H_3-5=h_2-2The thread height H of the outer ring thread of the semi-wrapped steel column cap 3-5 with the outer ring thread vertically arranged on the combined floor bearing plate_3-5Is greater than the height H of the screw hole of the big hexagonal nut 5 for fixing the external ring screw thread steel column cap₅The height H of the screw hole of the cylindrical nut 6-1 with the outer ring threaded steel column cap is fixed_6-1Sum, i.e. H_3-5＞H₅+H_6-1The non-threaded side of the outer ring threaded semi-wrapped steel column head 3-5 vertically arranged on the combined floor bearing plate is an inwards concave rectangular column, and in order to enable the outer ring threaded semi-wrapped steel column head 3-5 vertically arranged on the combined floor bearing plate to be completely attached to the inner ring threaded steel column head 2-2 vertically arranged on the steel beam, the short edge length d of the outer ring threaded semi-wrapped steel column head 3-5 vertically arranged on the combined floor bearing plate is the length of the short edge of the inwards concave rectangular column_s-3-5Is the length of the long side d_l-3-50.5 times of the length of the long edge of the combined floor bearing plate, the vertically arranged outer ring thread semi-wrapped steel column cap 3-5 concave rectangular columns_l-3-5Side length d of square column with inner ring deformed steel bar column head 2-2 vertically arranged with steel beam_2-2The number of the first and the second antennas is equal,i.e. d_s-3-5=0.5d_l-3-5=0.5d_2-2；

As shown in fig. 14, the outer steel form transverse outer ring threaded semi-clad steel column head 4-4 is divided into two parts, namely a threaded side and an unthreaded side, the threaded side of the outer steel form transverse outer ring threaded semi-clad steel column head 4-4 is provided with outer ring threads, and the outer diameter D of the outer ring threads of the outer steel form transverse outer ring threaded semi-clad steel column head 4-4 is_4-4And the size D of the screw hole for fixing the large hexagon nut 5 with the outer ring screw-thread steel column cap₅And the size D of the screw hole for fixing the cylindrical nut 6-1 with the outer ring threaded steel column head_6-1Equal, i.e. D_4-4=D₅=D_6-1The thread height H of the outer ring thread of the 4-4 outer ring thread of the horizontally-arranged outer ring semi-wrapped steel column cap of the outer side steel template_4-4Equal to the height h of a square column of a threaded steel column head 1-2 of a transverse inner ring of the steel pipe column_1-2I.e. H_4-4=h_1-2The thread height H of the outer ring thread of the 4-4 outer ring thread of the semi-wrapped steel column cap of the outer side steel template in the transverse position_4-4Is greater than the height H of the screw hole of the big hexagonal nut 5 for fixing the external ring screw thread steel column cap₅The height H of the screw hole of the cylindrical nut 6-1 with the outer ring threaded steel column cap is fixed_6-1Sum, i.e. H_4-4＞H₅+H_6-1The non-threaded side of the outer steel template transverse outer ring threaded semi-wrapped steel column head 4-4 is an inward concave rectangular column, and in order to enable the outer steel template transverse outer ring threaded semi-wrapped steel column head 4-4 to be completely attached to the steel pipe column transverse inner ring threaded steel column head 1-2, the short edge length d of the outer steel template transverse outer ring threaded semi-wrapped steel column head 4-4 inward concave rectangular column_s-4-4Is the length of the long side d_l-4-40.5 times of the length of the long edge of the outer steel template transversely arranged outer ring thread semi-wrapped steel column head 4-4 concave rectangular column_l-4-4Side length d of square column of threaded steel column head 1-2 of inner ring transversely arranged with steel pipe column_1-2Equal, i.e. d_s-4-4=0.5d_l-4-4=0.5d_1-2；

As shown in fig. 15, the outer steel form erecting outer ring thread semi-clad steel column head 4-5 is divided into a threaded side and a non-threaded side, the outer steel form erecting outer ring thread semi-clad steel column head 4-5 is provided with outer ring threads on the threaded side, and the outer steel form erecting outer ring thread semi-clad steel column headOuter diameter D of outer ring thread of steel-clad column cap 4-5_4-5And the size D of the screw hole for fixing the large hexagon nut 5 with the outer ring screw-thread steel column cap₅And the size D of the screw hole of the cylindrical nut 6-1 with the fixed outer ring threaded steel column cap_6-1Equal, i.e. D_4-5=D₅=D_6-1The thread height H of the outer ring thread of the semi-wrapped steel column cap 4-5 with the outer ring thread vertically arranged on the outer side steel template_4-5Equal to the height h of the square column with the steel beam vertically arranged inner ring deformed steel column head 2-2_2-2I.e. H_4-5=h_2-2The thread height H of the outer ring thread of the semi-wrapped steel column cap 4-5 with the outer ring thread vertically arranged on the outer side steel template_4-5Is greater than the height H of the screw hole of the big hexagonal nut 5 for fixing the external ring screw thread steel column cap₅The height H of the screw hole of the cylindrical nut 6-1 with the outer ring threaded steel column cap is fixed_6-1Sum, i.e. H_4-5＞H₅+H_6-1The non-threaded side of the outer ring threaded semi-wrapped steel column head 4-5 erected by the outer side steel template is an inwards concave rectangular column, and in order to enable the outer ring threaded semi-wrapped steel column head 4-5 erected by the outer side steel template to be completely attached to the inner ring threaded steel column head 2-2 erected by the steel beam, the short edge length d of the outer ring threaded semi-wrapped steel column head 4-5 inwards concave rectangular column erected by the outer side steel template is_s-4-5Is the length of the long side d_l-4-50.5 times of the length of the long edge of the outer ring thread semi-wrapped steel column head 4-5 concave rectangular columns vertically arranged on the outer side steel template_l-4-5Side length d of square column with inner ring deformed steel bar column head 2-2 vertically arranged with steel beam_2-2Equal, i.e. d_s-4-5=0.5d_l-4-5=0.5d_2-2；

The double-thread steel column head connection type steel reinforced floor support plate-beam-column system comprises the following specific construction steps:

(1) as shown in fig. 2 to 9, prefabricating a steel tube column 1 with an inner ring threaded steel column head, a steel beam 2 with an inner ring threaded steel column head, a steel rib combined floor bearing plate 3 arranged at the bottom of a steel column head with an outer ring threaded half-wrapping, a steel template 4 outside the steel column head with the outer ring threaded half-wrapping, a large hexagon nut 5 for fixing the steel column head with the outer ring threaded steel, a cylindrical nut 6 for fixing the steel column head with the inner ring threaded steel column head and the outer ring threaded steel column head, a hinged connecting plate 7, a bolt group 8 for connecting steel ribs and the hinged connecting plate, and a bolt group 9 for connecting the hinged connecting plate and the steel beam, and transporting the steel tube column to a construction site;

(2) as shown in fig. 2, performing bottom layer construction, hoisting the steel pipe column 1 with the inner ring threaded steel column cap to a specified position, and connecting the steel pipe column with the foundation;

(3) as shown in fig. 2, connecting a steel column head steel beam 2 with internal ring threads with a steel column head steel tube column (1) with internal ring threads to form a beam column frame;

(4) as shown in fig. 16, the steel column head bottom steel rib combined floor support plate 3 with the steel column head covered with the outer ring thread is assembled on a beam column frame formed by the steel column 1 with the steel column head with the inner ring thread and the steel beam 2 with the steel column head with the inner ring thread by using the large hexagon nut 5 with the steel column head with the outer ring thread and the cylindrical nut 6 for fixing the steel column head with the inner ring thread;

(5) as shown in fig. 17, the steel form 4 outside the steel column head with the external ring thread is assembled on a beam column frame formed by the steel column 1 with the steel column head with the internal ring thread and the steel beam 2 with the steel column head with the internal ring thread by using the large hexagon nut 5 of the steel column head with the external ring thread and the cylindrical nut 6 for fixing the steel column head with the internal ring thread, and is connected and fixed with the steel rib combined floor support plate 3 arranged at the bottom of the steel column head with the external ring thread;

(6) as shown in fig. 18, the bottom-mounted T-shaped steel skeleton of the bottom-mounted steel skeleton combined floor support plate 3 with the steel column head with the inner ring thread is hinged to the steel column 2 with the steel column head with the inner ring thread by using a hinged connection plate 7, a connection steel skeleton and hinged connection plate bolt group 8, and a connection hinged connection plate and steel beam bolt group 9;

(7) as shown in fig. 23, a concrete post-pouring construction process of the bottom floor slab is performed at a designated position;

(8) hoisting the steel pipe column 1 with the threaded steel column cap with the inner ring above the bottom layer, and connecting the steel pipe column with the steel pipe column of the next layer;

(9) and repeating the installation procedures from (3) to (7), and performing the construction of the combined frame with more than 2 layers until the integral assembly of the double-thread steel column head connection type steel reinforced floor bearing plate-beam-column system is completed.

In order to better explain the assembling method in the steps (4) to (5), the mounting method of the double-thread steel column head connection type steel floor bearing plate-beam-column system divided into three key positions of an inner column position, a side column position and an angle column position is explained in detail:

as shown in fig. 19, the beam-column framework at the inner-column position comprises 1 steel-pipe column with inner-ring threaded steel column head 1 and 4 steel-beam column head 2 with inner-ring threaded steel column head, 4 steel-pipe column transverse inner-ring threaded steel column heads 1-2 are welded around 1 steel-pipe column 1-1, the double-threaded steel column head connection type steel-reinforced floor deck-beam-column system at the inner-column position only performs step 5, and the refining steps are as follows: firstly, on the basis of finishing the assembly of a beam column frame at the position of an inner column, 4 steel column head bottom steel-clad combined floor bearing plates 3 with outer ring threads are arranged outside four corners of the inner column (namely 1 steel column head steel tube 1 with inner ring threads), 4 reserved square hole vertical angle steels 3-2 completely surround the four corners of the steel column head steel tube 1 with the inner ring threads, 8 combined floor bearing plates are transversely provided with outer ring thread steel column heads 3-4 to completely surround the unthreaded square columns of the steel column heads 1-2 with the inner ring threads transversely arranged 4 steel tube columns in a pairwise manner, the steel column heads 1-2 with the inner ring threads transversely arranged 4 steel tube columns are only exposed at the top end of the column head with the inner ring threads, 8n combined floor bearing plates are vertically provided with outer ring thread steel column heads 3-5 to completely surround the unthreaded square columns with the steel column heads 2-2 with the inner ring threads arranged 4n steel beams in a pairwise manner, 4n steel beams are vertically arranged on the inner ring thread steel column heads 2-2, and only the top ends of the column heads with the inner ring threads are exposed; secondly, 4n +4 large hexagon nuts 5 for fixed outer ring threaded steel column heads are installed on the outer sides of 3-4 of the horizontal outer ring threaded semi-wrapped steel column heads of 8 combined floor bearing plates and 3-5 of the vertical outer ring threaded semi-wrapped steel column heads of 8n combined floor bearing plates, and 4n +4 large hexagon nuts 5 for fixed outer ring threaded steel column heads are fastened to the bottom ends of 3-4 of the horizontal outer ring threaded semi-wrapped steel column heads of 8 combined floor bearing plates and 3-5 of the vertical outer ring threaded semi-wrapped steel column heads of 8n combined floor bearing plates, so that the horizontal outer ring threaded semi-wrapped steel column heads 3-4 of 8 combined floor bearing plates and the vertical outer ring threaded semi-wrapped steel column heads 3-5 of 8n combined floor bearing plates which are combined in a group in pairs obtain a primary fastening effect; and thirdly, 4n +4 fixed inner-outer ring threaded steel column head cylindrical nuts 6 are installed at the top ends of the column heads with the inner ring threads, exposed by 4 steel pipe column transverse inner ring threaded steel column heads 1-2 and 4n steel beam vertical inner ring threaded steel column heads 2-2, so that 4 steel pipe column transverse inner ring threaded steel column heads 1-2 and 4n steel beam vertical inner ring threaded steel column heads 2-2 are fixed to 8 combined floor bearing plate transverse outer ring threaded half-clad steel column heads 3-4 and 8n combined floor bearing plates vertical outer ring threaded half-clad steel column heads 3-5, and 8 combined floor bearing plates transverse outer ring threaded half-clad steel column heads 3-4 and 8n combined floor bearing plates vertical outer ring threaded half-clad steel column heads 3-5 are fastened again.

As shown in fig. 20, the beam-column framework at the jamb position includes 1 steel pipe column 1 with inner threaded steel column head and 3 steel beam 2 with inner threaded steel column head, 1 steel pipe column 1-1 welds 3 steel pipe columns on three sides near the inner column and transversely puts the steel pipe column head 1-2 with inner threaded steel column head, the double threaded steel column head connection type steel floor slab-beam-column system at the jamb position needs to carry out the steps (5) - (6), and the refining steps are as follows: firstly, on the basis of finishing the assembly of a beam column frame at the side column position, respectively installing 2 steel column head bottom steel-clad combined floor bearing plates 3 with outer ring threads and 2 steel column head outer side steel templates 4 with outer ring threads at two sides of the side column (namely 1 steel column head steel tube 1 with inner ring threads) close to and far away from an inner column, 2 reserved square hole vertical angle steels 3-2 and 2 reserved square hole vertical steel plates 4-3 surround three surfaces of 1 steel column head steel tube 1 with inner ring threads close to the inner column, completely surrounding unthreaded square columns of 3 steel tube column transverse inner ring threaded steel column heads 1-2 by 4 combined floor bearing plates transversely arranged outer ring threaded steel column heads 3-4 and 2 steel column head steel plates transversely arranged outer ring threaded steel column heads 4-4 in a pairwise mode, and only exposing the column head top ends with inner ring threads of 3 steel tube column heads 1-2 transversely arranged inner ring threaded steel column heads, the method comprises the following steps that 4n combined floor bearing plates are provided with outer ring threaded semi-wrapped steel column heads 3-5 in a vertical mode, 2n outer side steel templates are provided with outer ring threaded semi-wrapped steel column heads 4-5 in a vertical mode, the thread-free square columns with 3n steel beams provided with inner ring threaded steel column heads 2-2 in a vertical mode are completely surrounded in a pairwise mode, and 3n steel beams are provided with inner ring threaded steel column heads 2-2 in a vertical mode, and only the top ends of the column heads with inner ring threads are exposed; secondly, 3-4 outer ring thread semi-wrapped steel column heads are transversely arranged on 4 combined floor bearing plates, 4-4 outer ring thread semi-wrapped steel column heads are transversely arranged on 2 outer side steel templates, 3-5 outer ring thread semi-wrapped steel column heads are vertically arranged on 4-4 n combined floor bearing plates, 3n +3 large hexagon nuts 5 for fixed outer ring thread semi-wrapped steel column heads are vertically arranged on the outer sides of 4-5 outer ring thread semi-wrapped steel column heads are vertically arranged on 2n outer side steel templates, 3-4 outer ring thread semi-wrapped steel column heads are transversely arranged on 4 outer side steel templates, 3-5 outer ring thread semi-wrapped steel column heads are vertically arranged on 4n combined floor bearing plates, and the bottom end of 4-5 outer ring thread semi-wrapped steel column heads is vertically arranged on 2n outer side steel templates, so that 4 combined floor bearing plates in a group are transversely arranged on the outer ring thread semi-wrapped steel column heads, 3-4 combined floor bearing plates in a group, 2 outer side steel templates are transversely provided with outer ring threaded half-wrapped steel column heads 4-4, 4n combined floor bearing plates are vertically provided with outer ring threaded half-wrapped steel column heads 3-5, and 2n outer side steel templates are vertically provided with outer ring threaded half-wrapped steel column heads 4-5 to obtain a primary fastening effect; thirdly, 3n +3 fixed inner and outer ring threaded steel column cylindrical nuts 6 are installed at the top ends of the exposed columns with the inner ring threads of 3 steel pipe column horizontal inner ring threaded steel columns 1-2 and 3n steel beam vertical inner ring threaded steel columns 2-2, so that not only are 3 steel pipe column horizontal inner ring threaded steel columns 1-2 and 3n steel beam vertical inner ring threaded steel columns 2-2 fixed to 4 combined floor bearing plate horizontal outer ring threaded semi-clad steel columns 3-4, 2 outer side steel plate horizontal outer ring threaded semi-clad steel columns 4-4, 4n combined floor bearing plate vertical outer ring threaded semi-clad steel columns 3-5, 2n outer side steel plates vertical outer ring threaded semi-clad steel columns 4-5, but also 4 combined floor bearing plate horizontal outer ring threaded semi-clad steel columns 3-4, 2 outer side steel plate horizontal outer ring threaded semi-clad steel columns 4-4, 4, The 4n combined floor bearing plates are vertically provided with 3-5 outer ring thread semi-wrapped steel column heads, and the 2n outer side steel templates are vertically provided with 4-5 outer ring thread semi-wrapped steel column heads to be fastened again.

As shown in fig. 21, the beam-column framework at the corner-column position includes 1 steel pipe column 1 with a threaded steel column head and 2 steel beam 2 with a threaded steel column head, 1 steel pipe column 1-1 is welded with 2 steel pipe columns on two sides of the inner column, the threaded steel column head 1-2 is transversely arranged on the inner column, the double-threaded steel column head connection type steel floor slab-beam-column system at the corner-column position needs to perform steps (5) - (6), and the refining steps are as follows: firstly, on the basis of finishing the assembly of a beam column frame at the position of a corner column, respectively installing 1 bottom steel-clad combined floor support plate 3 with outer ring thread and 2 outside steel form plates 4 with outer ring thread and half steel-clad column head at two sides of the corner column (namely 1 steel tube column 1 with inner ring thread) close to and far away from the inner column, 1 reserved square hole vertical angle steel 3-2 and 2 reserved square hole vertical steel plates 4-3 surround two surfaces of 1 steel tube column 1 with inner ring thread and close to the inner column, 2 combined floor support plates transversely arrange the outer ring thread and half steel column head 3-4 and 2 outside steel form plates transversely arrange the outer ring thread and half steel column head 4-4 in a group to completely surround the unthreaded square column of 2 steel tube column transversely arranged inner ring thread steel column head 1-2, 2 steel tube column transversely arrange the inner ring thread and steel column head 1-2 and only expose the top end with inner ring thread, 2n combined floor bearing plates are vertically provided with outer ring threaded semi-clad steel column heads 3-5 and 2n outer side steel templates are vertically provided with outer ring threaded semi-clad steel column heads 4-5, the 2n steel beams are vertically provided with the unthreaded square columns of the inner ring threaded steel column heads 2-2 and completely surround the unthreaded square columns in a pairwise manner, and the 2n steel beams are vertically provided with the inner ring threaded steel column heads 2-2 and only expose the top ends of the column heads with inner ring threads; secondly, 2n +2 large hexagon nuts 5 for fixed outer ring threaded steel column caps are arranged on the outer sides of 3-4 for the horizontally-arranged outer ring threaded semi-clad steel column caps of 2 combined floor bearing plates, 3-5 for the vertically-arranged outer ring threaded semi-clad steel column caps of 2n combined floor bearing plates and 4-5 for the vertically-arranged outer ring threaded semi-clad steel column caps of 2n outer side steel plates, 2n +2 large hexagon nuts 5 for fixed outer ring threaded steel column caps are fastened to 3-4 for the horizontally-arranged outer ring threaded semi-clad steel column caps of 2 combined floor bearing plates, 4-4 for the horizontally-arranged outer ring threaded semi-clad steel column caps of 2 outer side steel plates, 3-5 for the vertically-arranged outer ring threaded semi-clad steel column caps of 2n combined floor bearing plates and the lowest end of 4-5 for the vertically-arranged outer ring threaded semi-clad steel column caps of 2n outer side steel plates, so that two groups of 2 combined floor bearing plates are provided with the horizontally-arranged outer ring threaded semi-clad steel column caps 3-4, 2 outer steel templates are transversely provided with outer ring threaded half-wrapped steel column heads 4-4, 2n combined floor bearing plates are vertically provided with outer ring threaded half-wrapped steel column heads 3-5, and 2n outer steel templates are vertically provided with outer ring threaded half-wrapped steel column heads 4-5 to obtain a primary fastening effect; thirdly, 2n +2 fixed inner-outer ring threaded steel column head cylindrical nuts 6 are installed at the top ends of the exposed column heads with the inner ring threads of 2-2 steel tube column transverse inner ring threaded steel column heads 1-2 and 2n steel beam vertical inner ring threaded steel column heads 2-2, so that not only are the 2 steel tube column transverse inner ring threaded steel column heads 1-2 and 2n steel beam vertical inner ring threaded steel column heads 2-2 fixed to 2 combined floor deck transverse outer ring threaded half-clad steel column heads 3-4, 2 outer side steel deck transverse outer ring threaded half-clad steel column heads 4-4, 2n combined floor deck vertical outer ring threaded half-clad steel column heads 3-5, 2n outer side steel decks vertical outer ring threaded half-clad steel column heads 4-5, but also the 2 combined floor deck transverse outer ring threaded half-clad steel column heads 3-4, 2 outer side steel deck transverse outer ring threaded half-clad steel column heads 4-4, 2, 3-5 outer ring thread semi-wrapped steel column heads are vertically arranged on the 2n combined floor bearing plates, and 4-5 outer ring thread semi-wrapped steel column heads are vertically arranged on the 2n outer side steel templates and are fastened again.

Further, as shown in fig. 22, the principle of the connection of the double-threaded steel stud is as follows: taking the installation and connection of a steel beam 2 with an inner ring threaded steel column head and a steel rib combined floor bearing plate 3 arranged at the bottom of a half-wrapped steel column head with an outer ring threaded steel as an example, firstly, welding a steel beam vertically-arranged inner ring threaded steel column head 2-2 to an upper flange of the steel beam 2-1; secondly, mounting a steel rib combined floor bearing plate 3 with an outer ring threaded half-wrapped steel column head and a bottom on a steel beam 2 with an inner ring threaded steel column head, wherein the inward concave rectangular column on the unthreaded side of the combined floor bearing plate with the vertically arranged outer ring threaded half-wrapped steel column head 3-5 is completely attached to one side of the square column with the vertically arranged inner ring threaded steel column head 2-2 of the steel beam; thirdly, installing the other steel rib combined floor bearing plate 3 with the outer ring thread half-wrapped steel column head at the bottom onto the steel beam 2 with the inner ring thread steel column head, wherein the concave rectangular column at the non-thread side of the outer ring thread half-wrapped steel column head 3-5 vertically arranged on the combined floor bearing plate is completely attached to the other side of the square column of the steel beam vertically arranged on the inner ring thread steel column head 2-2, the threaded side of the outer ring thread half-wrapped steel column head 3-5 vertically arranged on the two combined floor bearing plates forms a complete outer ring thread, and the concave rectangular column at the non-thread side of the outer ring thread half-wrapped steel column head 3-5 vertically arranged on the two combined floor bearing plates completely wraps the square column of the steel beam vertically arranged on the inner ring thread steel column head 2-2; fourthly, mounting the large hexagon nut 5 of the outer ring threaded steel column cap on the threaded side of the vertically arranged outer ring threaded semi-wrapped steel column cap 3-5 of the two combined floor bearing plates to form a complete outer ring thread, and screwing the outer ring threaded semi-wrapped steel column cap to the bottommost end, so that the vertically arranged outer ring threaded semi-wrapped steel column cap 3-5 of the two combined floor bearing plates obtains a preliminary fastening effect; fifthly, installing and fixing an inner and outer ring threaded steel column head cylindrical nut 6 at the top end of the exposed column head with the inner ring threads of the steel beam vertically-arranged inner ring threaded steel column head 2-2, wherein the fixed outer ring threaded steel column head cylindrical nut 6-1 is matched with the outer ring threads of the two combined floor bearing plates vertically-arranged outer ring threaded semi-wrapped steel column heads 3-5, and the fixed inner ring threaded steel column head cylindrical nut 6-2 is matched with the inner ring threads of the top end of the steel beam vertically-arranged inner ring threaded steel column head 2-2, so that not only the steel beam vertically-arranged inner ring threaded steel column head 2-2 is fixed on the vertically-arranged outer ring threaded semi-wrapped steel column head 3-5 of the 2 combined floor bearing plates, but also the vertically-arranged outer ring threaded semi-wrapped steel column head 3-5 of the 2 combined floor is fastened again.

The steel pipe column 1-1 can be a steel pipe column or a steel pipe concrete column, the welding distance of the head 2-2 of the steel beam vertically provided with the inner ring thread steel can be adjusted according to actual needs, the aperture, the pitch, the number of holes and the distribution form of the holes of the reserved screw holes 2-3 in the span of the steel beam can be adjusted according to actual needs, the steel bottom plate 3-1 of the combined floor support plate can be a common steel plate, a coated steel plate, an alloy steel plate and the like, the aperture, the pitch, the number of holes and the distribution form of the holes of the reserved screw hole T-shaped steel rib 3-3 can be adjusted according to actual needs, the distance of the vertically provided outer ring thread semi-wrapped steel head 3-5 of the combined floor support plate can be adjusted according to actual needs, the reinforcing steel bar distribution form of the prefabricated reinforced concrete plate 3-6 can be adjusted according to actual needs and design specifications, the distance between the outer ring thread semi-wrapped steel column heads 4-5 vertically arranged on the outer side steel formwork can be adjusted according to actual needs, the aperture, the pitch, the number of holes and the hole distribution form of connecting plate reserved screw holes 7-2 corresponding to the steel beam midspan reserved screw holes can be adjusted according to actual needs, and the aperture, the pitch, the number of holes and the hole distribution form of connecting plate reserved screw holes 7-3 corresponding to the T-shaped steel beam reserved screw holes can be adjusted according to actual needs.

The embodiments of the present invention are described in detail above with reference to the drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various modifications, substitutions and variations can be made in the embodiments without departing from the spirit and scope of the invention.

Claims

1. The double-threaded steel column head connection type steel rib floor bearing plate-beam-column system is characterized by comprising a steel tube column (1) with an inner ring threaded steel column head, a steel column head steel beam (2) with an inner ring threaded steel, a steel rib combined floor bearing plate (3) arranged at the bottom of the steel column head with an outer ring threaded half-wrapping steel, a steel template (4) outside the steel column head with an outer ring threaded half-wrapping steel, a large hexagon nut (5) for fixing the steel column head with an outer ring threaded steel, a cylindrical nut (6) for fixing the steel column head with an inner ring threaded steel column head and an outer ring threaded steel column head, a hinged connecting plate (7), a bolt group (8) for connecting steel ribs and the hinged connecting plate, and a bolt group (9) for connecting the hinged connecting plate and the steel beam;

the steel column head steel pipe column (1) with the inner ring thread steel column head and the steel column head steel beam (2) with the inner ring thread steel column head are connected to form a beam column framework, the steel rib combined floor bearing plate (3) with the bottom of the steel column head with the outer ring thread steel column head and the steel column head outer side steel template (4) with the outer ring thread steel column head are assembled on the beam column framework formed by the steel column head steel pipe column (1) with the inner ring thread steel column head and the steel beam (2) with the inner ring thread steel column head through a large hexagon nut (5) with a fixed outer ring thread steel column head and a cylindrical nut (6) with a fixed inner ring thread steel column head, and the bottom T-shaped steel rib of the steel column head combined floor bearing plate (3) with the outer ring thread steel column head is hinged and connected to the steel column head steel beam (2) with the inner ring thread through a hinged connecting plate (7), a connecting steel rib and a hinged connecting plate and a steel beam bolt group (9).

2. The double-threaded steel column head connection type steel floor deck-beam-column system according to claim 1, wherein the steel tube column (1) with the inner-ring threaded steel column head comprises a steel tube column (1-1) and a steel tube column transverse inner-ring threaded steel column head (1-2), the steel tube column transverse inner-ring threaded steel column head (1-2) is welded to the steel tube column (1-1), and the welding height of the steel tube column transverse inner-ring threaded steel column head (1-2) is H_1-2The method comprises the following steps that 1 steel pipe column transverse inner ring deformed steel bar column head (1-2) is welded on the periphery of 1 steel pipe column (1-1) at the position of an inner column, 1 steel pipe column (1-1) at the position of a side column is welded on three sides of the middle column close to the middle column, 1 steel pipe column transverse inner ring deformed steel bar column head (1-2) is welded on two sides of 1 steel pipe column (1-1) at the position of an angle column close to the middle column, and 1 steel pipe column transverse inner ring deformed steel bar column head (1-2) is welded on two sides of the middle column;

the steel beam (2) with the inner ring threaded steel column head comprises a steel beam (2-1), the steel beam is vertically provided with the inner ring threaded steel column head (2-2), a screw hole (2-3) is reserved in a steel beam span, the steel beam is vertically provided with the inner ring threaded steel column head (2-2) and is longitudinally welded to the upper flange of the steel beam (2-1) along a row, and the welding distance between the steel beam and the inner ring threaded steel column head (2-2) is L_2-2The middle reserved screw holes (2-3) of the steel beam span are 2 rows of 3 rows of bolt holes in the middle of the steel beam (2-1), and the hole diameter of the bolt holes of the middle reserved screw holes (2-3) of the steel beam span is D_2-3；

The steel rib combined floor bearing plate (3) with the bottom of the steel column head with the outer ring thread comprises a combined floor bearing plate steel bottom plate (3-1), reserved square hole vertical angle steel (3-2), reserved screw hole T-shaped steel ribs (3-3), a combined floor bearing plate horizontal outer ring thread half-wrapped steel column head (3-4), a combined floor bearing plate vertical outer ring thread half-wrapped steel column head (3-5) and prefabricated reinforced concrete plates (3-6), a row of square holes are reserved around the combined floor bearing plate steel bottom plate (3-1), and the square hole of the combined floor bearing plate steel bottom plate (3-1) is D in diameter_3-1The square hole interval L of the steel bottom plate (3-1) of the combined floor bearing plate_3-1Welding distance L between steel beam and inner ring screw-thread steel column cap (2-2) vertically arranged_2-2Are equal, i.e. L_3-1=L_2-2Square holes are reserved at two ends of the angle steel of the reserved square hole vertical angle steel (3-2), and the diameter of the square hole of the reserved square hole vertical angle steel (3-2) is D_3-2The height H of the center of the square hole of the reserved square hole vertical angle steel (3-2)_3-2The welding height H of the threaded steel column head (1-2) of the inner ring transversely arranged with the steel pipe column_1-2In agreement, i.e. H_3-2=H_1-2The prefabricated building support plate steel bottom plate is characterized in that the reserved square hole vertical angle steel (3-2) is welded to four corners of a combined building support plate steel bottom plate (3-1), 4 reserved square hole vertical angle steel (3-2) are welded on 1 combined building support plate steel bottom plate (3-1), 1 row of 3 rows of bolt holes are reserved at two ends of the reserved screw hole T-shaped steel rib (3-3), and the diameter of a bolt hole of the reserved screw hole T-shaped steel rib (3-3) is D_3-3The reserved screw hole T-shaped steel rib (3-3) is welded to the middle lower end of a steel bottom plate (3-1) span of the combined floor support plate, the combined floor support plate transversely-arranged outer ring threaded semi-wrapped steel column head (3-4) is welded to the reserved square hole of the reserved square hole vertical angle steel (3-2), and the combined floor support plate transversely-arranged outer ring threaded semi-wrapped steel column head (3-4) is welded at a height H_3-4The welding height H of the threaded steel column head (1-2) of the inner ring transversely arranged with the steel pipe column_1-2In agreement, i.e. H_3-4=H_1-2=H_3-21 reserved square hole vertical angle steel (3-2) is welded with 2 combined floor bearing plate horizontal outer ring threaded semi-wrapped steel column heads (3-4), and the combined floor bearing plate vertical outer ring threaded semi-wrapped steel column heads (3-5) are arranged alongThe welding space L of the square holes reserved on the periphery of the steel bottom plate (3-1) of the combined floor bearing plate is longitudinally welded, and the combined floor bearing plate is vertically provided with an outer ring thread semi-wrapped steel column head (3-5)_3-5Welding distance L between steel beam and inner ring screw-thread steel column cap (2-2) vertically arranged_2-2Coincidence, i.e. L_3-5=L_2-2The prefabricated reinforced concrete slab (3-6) is poured above the steel bottom plate (3-1) of the combined floor bearing plate;

the outer steel template (4) with the outer ring threaded semi-clad steel column head comprises an outer steel template steel bottom plate (4-1), an outer steel template vertical steel plate (4-2), a reserved square hole vertical steel plate (4-3), an outer steel template transverse outer ring threaded semi-clad steel column head (4-4) and an outer steel template vertical outer ring threaded semi-clad steel column head (4-5), a column of square holes are reserved on one side of the outer steel template steel bottom plate (4-1), and the square hole interval L of the outer steel template steel bottom plate (4-1)_4-1Welding distance L between steel beam and inner ring screw-thread steel column cap (2-2) vertically arranged_2-2Are equal, i.e. L_4-1=L_2-2The outer side steel template vertical steel plate (4-2) is welded to the other side of the reserved square hole of the outer side steel template steel base plate (4-1), a square hole is reserved at one end of the reserved square hole vertical steel plate (4-3), and the square hole diameter D of the reserved square hole vertical steel plate (4-3)_4-3Square holes D are reserved around the steel bottom plate (3-1) of the combined floor bearing plate_3-1Coincidence, i.e. D_4-3=D_3-1The height H of the center of the square hole of the reserved square hole vertical steel plate (4-3)_4-3The welding height H of the threaded steel column head (1-2) of the inner ring transversely arranged with the steel pipe column_1-2In agreement, i.e. H_4-3=H_1-2The reserved square hole vertical steel plate (4-3) is welded to two ends of an outer side steel template steel bottom plate (4-1), 1 outer side steel template steel bottom plate (4-1) is welded with 1 outer side steel template vertical steel plate (4-2) and 2 reserved square hole vertical steel plates (4-3), the outer side steel template transverse outer ring thread semi-clad steel column head (4-4) is welded to the reserved square hole of the reserved square hole vertical steel plate (4-3), and the outer side steel template transverse outer ring thread semi-clad steel column head (4-4) is welded with the welding height H_4-4The welding height H of the threaded steel column head (1-2) of the inner ring transversely arranged with the steel pipe column_1-2In agreement, i.e. H_4-4=H_1-2=H_4-31 vertical steel plate (4-3) with reserved square hole is welded with 1 lateral steel template transversely arrangedThe outer ring thread semi-clad steel column head (4-4), the outer ring thread semi-clad steel column head (4-5) is vertically arranged on the outer side steel template, and is longitudinally welded to a row of square holes of the outer side steel template steel bottom plate (4-1), and the welding distance L of the outer ring thread semi-clad steel column head (4-5) is vertically arranged on the outer side steel template_4-5Welding distance L between steel beam and inner ring screw-thread steel column cap (2-2) vertically arranged_2-2Coincidence, i.e. L_4-5=L_2-2=L_4-1；

The large hexagon nut (5) for fixing the outer ring threaded steel column cap is a large hexagon nut with the thread size of the outer ring threads, and the screw hole size of the large hexagon nut (5) for fixing the outer ring threaded steel column cap is D₅The height of the screw hole of the large hexagonal nut (5) for fixing the outer ring threaded steel column cap is H₅The thread size of the large hexagon nut (5) for the fixed outer ring threaded steel column cap is matched with the outer ring thread half-wrapped steel column cap (3-4) for the combined floor support plate which is transversely provided with the outer ring threads, the combined floor support plate which is vertically provided with the outer ring thread half-wrapped steel column cap (3-5), the outer side steel template which is transversely provided with the outer ring threads half-wrapped steel column cap (4-4) and the outer side steel template which is vertically provided with the outer ring threads half-wrapped steel column cap (4-5), the large hexagon nut (5) for the fixed outer ring threaded steel column cap is used for fastening the combined floor support plate which is transversely provided with the outer ring threads half-wrapped steel column cap (3-4), the combined floor support plate which is vertically provided with the outer ring threads half-wrapped steel column cap (3-5), the outer side steel template which is transversely provided with the outer ring threads half-wrapped steel column cap (4-4) and the outer side steel template which is vertically provided with the outer ring threads half-wrapped steel column cap (4-5);

the fixed cylindrical nut (6) with the inner and outer ring threaded steel column heads comprises a fixed cylindrical nut (6-1) with the outer ring threaded steel column head and a fixed cylindrical nut (6-2) with the inner ring threaded steel column head, the fixed cylindrical nut (6-1) with the outer ring threaded steel column head is a circular nut with the thread size of outer ring threads, and the screw hole size of the fixed cylindrical nut (6-1) with the outer ring threaded steel column head is D_6-1The height of a screw hole of the cylindrical nut (6-1) for fixing the outer ring threaded steel column head is H_6-1The thread size of the fixed outer ring threaded steel column head cylindrical nut (6-1) and the fixed outer ring threaded steel column head cylindrical nut (6-1) are used for fastening a combined floor support plate transverse outer ring threaded semi-clad steel column head (3-4), a combined floor support plate vertical outer ring threaded semi-clad steel column head (3-5) and an outer side steel template transverse outer ring threaded semi-clad steel column head (3-5)The thread semi-wrapped steel column head (4-4) and the outer ring thread of the outer ring thread semi-wrapped steel column head (4-5) are matched, the fixed outer ring thread steel column head cylindrical nut (6-1) is used for fastening the combined floor bearing plate horizontal outer ring thread semi-wrapped steel column head (3-4), the combined floor bearing plate vertical outer ring thread semi-wrapped steel column head (3-5), the outer side steel template horizontal outer ring thread semi-wrapped steel column head (4-4) and the outer side steel template vertical outer ring thread semi-wrapped steel column head (4-5), the fixed inner ring thread steel column head cylindrical nut (6-2) is a circular nut with the thread size of an inner ring thread, and the screw hole size of the fixed inner ring thread steel column head cylindrical nut (6-2) is D_6-2The height of a screw hole of the cylindrical nut (6-2) for fixing the threaded steel column head of the inner ring is H_6-2The thread size of the cylindrical nut (6-2) for fixing the steel pipe column with the inner ring threaded steel column head is matched with the inner ring threads of the cylindrical nut (6-2) for fixing the steel pipe column with the transverse inner ring threaded steel column head (1-2) and the steel beam with the vertical inner ring threaded steel column head (2-2), and the cylindrical nut (6-2) for fixing the steel pipe column with the transverse inner ring threaded steel column head (1-2) and the steel beam with the vertical inner ring threaded steel column head (2-2) are used for fastening the steel pipe column with the transverse inner ring threaded steel column head (1-2) and the steel beam with the vertical inner ring threaded steel column head (2-2);

the hinged connecting plate (7) comprises angle steel plates (7-1), connecting plate reserved screw holes (7-2) corresponding to the reserved screw holes in the steel beam span and connecting plate reserved screw holes (7-3) corresponding to the reserved screw holes in the T-shaped steel frame, the reserved screw holes (7-2) corresponding to the reserved screw holes in the steel beam span are 1 row of 3 rows of reserved bolt holes corresponding to the reserved screw holes (2-3) in the steel beam span, and the bolt hole diameter D of the reserved screw holes (7-2) of the connecting plate corresponding to the reserved screw holes in the steel beam span_7-2The diameter D of the bolt hole of the screw hole (2-3) reserved in the span of the steel beam_2-3Equal, i.e. D_7-2=D_2-3(ii) a The reserved screw holes (7-3) of the connecting plate corresponding to the reserved screw holes of the T-shaped steel bones are 1 row of 3 rows of reserved screw holes corresponding to the reserved screw holes of the T-shaped steel bones (3-3) of the reserved screw holes, and the bolt hole diameter D of the reserved screw hole (7-3) of the connecting plate corresponding to the reserved screw holes of the T-shaped steel bones_7-3And the bolt aperture D of the T-shaped steel rib (3-3) with the reserved screw hole_3-3Equal, i.e. D_7-3=D_3-3；

The connecting steel rib and the hinged connecting plate bolt group (8) are1 column of 3 rows of bolt groups for connecting T-shaped steel ribs (3-3) with reserved connecting plate screw holes (7-3) corresponding to the reserved T-shaped steel ribs screw holes, wherein the bolt diameter D of the connecting steel ribs and the bolt groups (8) for hinging the connecting plates₈Slightly smaller than the screw hole diameter D of the T-shaped steel rib (3-3) connected with the reserved screw hole and the reserved screw hole (7-3) of the connecting plate corresponding to the reserved screw hole of the T-shaped steel rib₈＜D_7-3=D_3-3；

The connecting hinged connecting plate and the steel beam bolt group (9) are 2 rows of 3 rows of bolt groups which are used for connecting plate reserved screw holes (7-2) corresponding to the reserved screw holes in the steel beam span and the reserved screw holes (2-3) in the steel beam span, and the bolt diameter D of the connecting hinged connecting plate and the steel beam bolt group (9)₉Slightly smaller than the screw hole diameters of the connecting plate reserved screw hole (7-2) corresponding to the steel beam midspan reserved screw hole and the steel beam midspan reserved screw hole (2-3), namely D₉＜D_7-2=D_2-3。

3. The double-threaded steel column head connection type steel floor deck-beam-column system according to claim 2, wherein the top end of the transverse inner-threaded steel column head (1-2) of the steel tube column is provided with inner threads, and the outer diameter D of the inner threads at the top end of the transverse inner-threaded steel column head (1-2) of the steel tube column is larger than that of the inner threads at the top end of the transverse inner-threaded steel column head (1-2)_1-2The size D of a screw hole for fixing a cylindrical nut (6-2) at the head of a steel column with inner ring threads_6-2Equal, i.e. D_1-2=D_6-2The screw hole height H of the inner ring thread at the top end of the steel column head (1-2) with the steel column head transversely arranged on the inner ring thread_1-2The height H of a screw hole of a cylindrical nut (6-2) for fixing the head of the steel column with the inner ring threads_6-2Equal, i.e. H_1-2=H_6-2The side length of the square column of the threaded steel column head (1-2) of the inner ring of the steel pipe column in the transverse position is d_1-2The height of the square column of the threaded steel column head (1-2) of the transverse inner ring of the steel pipe column is h_1-2；

The top end of the column head of the steel beam vertical inner ring thread steel column head (2-2) is provided with an inner ring thread, and the outer diameter D of the inner ring thread at the top end of the column head of the steel beam vertical inner ring thread steel column head (2-2)_2-2The size D of a screw hole for fixing a cylindrical nut (6-2) at the head of a steel column with inner ring threads_6-2Equal, i.e. D_2-2=D_6-2The steel beam is vertically provided with the thread height H of the inner thread at the top end of the column head of the inner thread steel column head (2-2)_2-2The height H of a screw hole of a cylindrical nut (6-2) for fixing the head of the steel column with the inner ring threads_6-2Equal, i.e. H_2-2=H_6-2The side length of the square column of the steel beam vertically-arranged inner ring deformed steel column head (2-2) is d_2-2The height of the square column of the steel beam vertically provided with the threaded steel column head (2-2) of the inner ring is h_2-2；

The combined floor bearing plate transverse outer ring thread semi-wrapped steel column head (3-4) is divided into two parts, namely a threaded side and a non-threaded side, the threaded side of the combined floor bearing plate transverse outer ring thread semi-wrapped steel column head (3-4) is provided with outer ring threads, and the outer diameter D of the outer ring threads of the combined floor bearing plate transverse outer ring thread semi-wrapped steel column head (3-4)_3-4The size D of a screw hole of a large hexagonal nut (5) for fixing an outer ring threaded steel column head₅And a screw hole dimension D for fixing the cylindrical nut (6-1) with the outer ring threaded steel column head_6-1Equal, i.e. D_3-4=D₅=D_6-1The thread height H of the outer ring thread of the horizontal outer ring thread half-wrapped steel column cap (3-4) of the combined floor bearing plate_3-4Equal to the square column height h of the transverse inner ring thread steel column head (1-2) of the steel pipe column_1-2I.e. H_3-4=h_1-2The thread height H of the outer ring thread of the horizontal outer ring thread half-wrapped steel column cap (3-4) of the combined floor bearing plate_3-4Is greater than the height H of the screw hole of the big hexagonal nut (5) for fixing the outer ring screw steel column cap₅And the height H of a screw hole of a cylindrical nut (6-1) with a fixed outer ring threaded steel column head_6-1Sum, i.e. H_3-4＞H₅+H_6-1The unthreaded side of the horizontal outer ring threaded semi-wrapped steel column head (3-4) of the combined floor bearing plate is an inwards concave rectangular column, and the short edge length d of the horizontal outer ring threaded semi-wrapped steel column head (3-4) of the combined floor bearing plate is the length of the short edge of the inwards concave rectangular column_s-3-4Is the length of the long side d_l-3-40.5 times of the length of the long edge of the horizontal outer ring thread half-wrapped steel column head (3-4) concave rectangular column of the combined floor bearing plate_l-3-4Side length d of square column of threaded steel column head (1-2) with inner ring transversely arranged on steel pipe column_1-2Equal, i.e. d_s-3-4=0.5d_l-3-4=0.5d_1-2；

Combined floor support plate vertically-arranged outer ring threaded half-bagThe steel column cap (3-5) is divided into a threaded side and a non-threaded side, the threaded side of the combined floor bearing plate with the outer ring thread of the semi-wrapped steel column cap (3-5) vertically arranged is provided with the outer ring thread, and the outer diameter D of the outer ring thread of the combined floor bearing plate with the outer ring thread of the semi-wrapped steel column cap (3-5) vertically arranged_3-5The size D of a screw hole for fixing a large hexagonal nut (5) with an outer ring threaded steel column cap₅And a screw hole dimension D for fixing the cylindrical nut (6-1) with the outer ring threaded steel column head_6-1Equal, i.e. D_3-5=D₅=D_6-1The thread height H of the outer ring thread of the semi-wrapped steel column cap (3-5) with the outer ring thread vertically arranged on the combined floor bearing plate_3-5Equal to the height h of a square column with a steel beam vertically provided with an inner ring screw-thread steel column head (2-2)_2-2I.e. H_3-5=h_2-2The thread height H of the outer ring thread of the semi-wrapped steel column cap (3-5) with the outer ring thread vertically arranged on the combined floor bearing plate_3-5Is greater than the height H of the screw hole of the big hexagonal nut (5) for fixing the outer ring screw steel column cap₅And the height H of a screw hole of a cylindrical nut (6-1) with a fixed outer ring threaded steel column head_6-1Sum, i.e. H_3-5＞H₅+H_6-1The non-threaded side of the combined floor bearing plate vertically-arranged outer ring threaded semi-wrapped steel column head (3-5) is an inwards-concave rectangular column, and the short edge length d of the combined floor bearing plate vertically-arranged outer ring threaded semi-wrapped steel column head (3-5) inwards-concave rectangular column_s-3-5Is the length of the long side d_l-3-50.5 times of the length of the long edge of the combined floor bearing plate, the vertically arranged outer ring thread semi-wrapped steel column cap (3-5) concave rectangular column_l-3-5Side length d of square column with inner ring screw-thread steel column head (2-2) vertically arranged with steel beam_2-2Equal, i.e. d_s-3-5=0.5d_l-3-5=0.5d_2-2；

The steel column head (4-4) of the steel template with the transversely-arranged outer ring threads is divided into two parts, namely a threaded side and a non-threaded side, the threaded side of the steel column head (4-4) with the transversely-arranged outer ring threads is provided with the outer ring threads, and the outer diameter D of the outer ring threads of the steel column head (4-4) with the transversely-arranged outer ring threads of the steel template with the transversely-arranged outer ring threads is_4-4The size D of a screw hole for fixing a large hexagonal nut (5) with an outer ring threaded steel column cap₅And a screw hole dimension D for fixing the cylindrical nut (6-1) with the outer ring threaded steel column head_6-1Equal, i.e. D_4-4=D₅=D_6-1The thread height H of the outer ring thread of the semi-wrapped steel column cap (4-4) transversely arranged on the outer side steel template_4-4Equal to the height h of a square column of a threaded steel column head (1-2) of the transverse inner ring of the steel pipe column_1-2I.e. H_4-4=h_1-2The thread height H of the outer ring thread of the semi-wrapped steel column cap (4-4) transversely arranged on the outer side steel template_4-4Is greater than the height H of the screw hole of the big hexagonal nut (5) for fixing the outer ring screw steel column cap₅And the height H of a screw hole of a cylindrical nut (6-1) with a fixed outer ring threaded steel column head_6-1Sum, i.e. H_4-4＞H₅+H_6-1The non-threaded side of the outer-side steel formwork horizontal outer-ring threaded semi-wrapped steel column head (4-4) is an inwards concave rectangular column, and the short edge length d of the outer-side steel formwork horizontal outer-ring threaded semi-wrapped steel column head (4-4) inwards concave rectangular column_s-4-4Is the length of the long side d_l-4-40.5 times of the length of the long edge of the concave rectangular column head (4-4) of the outer ring thread of the steel form on the outer side_l-4-4Side length d of square column of threaded steel column head (1-2) with inner ring transversely arranged on steel pipe column_1-2Equal, i.e. d_s-4-4=0.5d_l-4-4=0.5d_1-2；

The outer side steel formwork is vertically provided with an outer ring thread semi-wrapped steel column head (4-5) which is divided into two parts, namely a threaded side and a non-threaded side, the outer side steel formwork is vertically provided with an outer ring thread on the threaded side of the outer ring thread semi-wrapped steel column head (4-5), and the outer side steel formwork is vertically provided with an outer diameter D of an outer ring thread of the outer ring thread semi-wrapped steel column head (4-5)_4-5The size D of a screw hole for fixing a large hexagonal nut (5) with an outer ring threaded steel column cap₅And a screw hole dimension D for fixing the cylindrical nut (6-1) with the outer ring threaded steel column head_6-1Equal, i.e. D_4-5=D₅=D_6-1The thread height H of the outer ring thread of the semi-wrapped steel column cap (4-5) with the outer ring thread vertically arranged on the outer side steel template_4-5Equal to the height h of a square column with a steel beam vertically provided with an inner ring screw-thread steel column head (2-2)_2-2I.e. H_4-5=h_2-2The thread height H of the outer ring thread of the semi-wrapped steel column cap (4-5) with the outer ring thread vertically arranged on the outer side steel template_4-5Is greater than the height H of the screw hole of the big hexagonal nut (5) for fixing the outer ring screw steel column cap₅And the height H of a screw hole of a cylindrical nut (6-1) with a fixed outer ring threaded steel column head_6-1Sum, i.e. H_4-5＞H₅+H_6-1The non-threaded side of the outer ring threaded semi-wrapped steel column head (4-5) vertically arranged on the outer side steel template is an inwards concave rectangular column, and the short edge length d of the inner concave rectangular column head (4-5) vertically arranged on the outer ring threaded semi-wrapped steel column head of the outer side steel template is the length d_s-4-5Is the length of the long side d_l-4-50.5 times of the length of the long edge of the concave rectangular column head (4-5) with the outer ring thread vertically arranged on the outer steel template_l-4-5Side length d of square column with inner ring screw-thread steel column head (2-2) vertically arranged with steel beam_2-2Equal, i.e. d_s-4-5=0.5d_l-4-5=0.5d_2-2。

4. Use of the double-threaded steel stud connection type steel floor deck-beam-column system according to any one of claims 1 to 3, characterized by comprising the following steps:

(1) prefabricating a steel tube column (1) with an inner ring threaded steel column head, a steel beam (2) with an inner ring threaded steel column head, a steel rib combined floor bearing plate (3) arranged at the bottom of a steel column head with an outer ring threaded half-wrapping steel column head, a steel template (4) outside the steel column head with the outer ring threaded half-wrapping steel column head, a large hexagon nut (5) for fixing the steel column head with the outer ring threaded steel column head, a cylindrical nut (6) for fixing the steel column head with the inner ring threaded steel column head and the outer ring threaded steel column head, a hinged connecting plate (7), a bolt group (8) for connecting steel ribs and the hinged connecting plate, and a hinged connecting plate and a steel beam bolt group (9), and transporting the steel tube column head to a construction site;

(2) carrying out bottom layer construction, hoisting the steel pipe column (1) with the steel column head with the inner ring thread to a specified position, and connecting the steel pipe column with the foundation;

(3) connecting the steel column head steel beam (2) with the internal ring thread with the steel column head steel tube column (1) with the internal ring thread to form a beam column framework;

(4) assembling the steel rib combined floor bearing plate (3) arranged at the bottom of the steel column head with the outer ring thread on a beam column frame formed by the steel column head with the inner ring thread and the steel beam (2) with the inner ring thread on the steel column head with the inner ring thread by using the large hexagon nut (5) of the steel column head with the outer ring thread and the cylindrical nut (6) for fixing the steel column head with the inner ring thread and the outer ring thread;

(5) assembling an outer steel template (4) of the half-wrapped steel column head with the outer ring thread on a beam column framework formed by the steel column head with the inner ring thread (1) and the steel beam (2) of the steel column head with the inner ring thread by using an outer ring thread steel column head large hexagon nut (5) and a fixed inner and outer ring thread steel column head cylindrical nut (6), and connecting and fixing the steel template with the steel combined floor bearing plate (3) arranged at the bottom of the steel column head with the outer ring thread;

(6) the bottom T-shaped steel rib of the bottom steel rib combined floor support plate (3) with the steel column head with the outer ring thread is hinged and connected to the steel column head steel beam (2) with the inner ring thread by using a hinged connection plate (7), a connection steel rib and hinged connection plate bolt group (8) and a connection hinged connection plate and steel beam bolt group (9);

(7) carrying out a concrete pouring construction procedure of the bottom floor slab at a specified position;

(8) hoisting the steel pipe column (1) with the steel column head with the inner ring threads above the bottom layer, and connecting the steel pipe column with the next layer;