CN103195163A - Multiple high-level assembly steel structure system capable of realizing rigid node connections - Google Patents

Abstract

The invention relates to a multi-high-rise assembled steel structure system that realizes node rigid connection and belongs to the technical field of structural engineering. The prefabricated steel structure system is composed of prefabricated floor slabs and prefabricated flange columns assembled with bolts; the prefabricated floor slabs include plate A, plate B and plate C, and the prefabricated floor slabs are spliced with bolts to form The entire floor of a building. The column base of the prefabricated floor slab and the surrounding beams are all welded in the factory, which can effectively realize the rigid connection of the nodes, ensure the welding quality, and is beneficial to the stress of the structure. The multi-high-rise assembled steel structure system of the present invention combines modularization, factoryization and assembly, realizes factory production, rapid assembly on site, improves construction speed, shortens construction period, reduces project cost, and reduces environmental pollution. Steel is recyclable and is a green and environmentally friendly structural system.

Description

A multi-story prefabricated steel structure system that realizes the rigid connection of nodes

technical field

The invention relates to a multi-high-rise assembled steel structure system which realizes node rigid connection, and belongs to the technical field of structural engineering.

Background technique

According to the statistics of China Iron and Steel Association, in 2011, my country's steel output exceeded 700 million tons, ranking first in the world's steel output. The steel structure building area in the United States accounted for more than 50% of the total building area, and Japan accounted for 80%, while my country accounted for less than 40%. %. China, as a big steel production country in the world, lags far behind in the development of steel structure housing.

my country's "Twelfth Five-Year Plan" proposes to bring the construction industry into the era of energy conservation, emission reduction and green environmental protection. The "Green Building Evaluation Standards" issued by the Ministry of Housing and Urban-Rural Development defines green buildings as follows: In the whole life cycle, maximize resource saving (land saving, energy saving, water saving, material saving), protect the environment and reduce pollution, provide people with healthy, applicable and efficient use of space, and a building that coexists harmoniously with nature. Steel structure residences can better reflect the essence of green buildings, and the "Twelfth Five-Year Plan" really provides a major opportunity for the innovation and industrialization of the corresponding system of steel structure in my country.

The research on multi-high-rise prefabricated steel structure systems at home and abroad is still in its infancy, and the innovation of industrialized prefabricated high-rise steel structure systems is imperative. A lot of welding is used in the construction of traditional steel structure residential buildings, the construction speed is slow, and the pollution to the environment is serious. The most important thing is that the quality of the welds is not suitable for control, which seriously affects the safety performance of the building.

At present, the problem of the existing multi-high-rise fabricated steel structure system in my country is that the splicing position of the floor slab is located at the node of the beam-column connection. Only relying on a limited number of high-strength bolts cannot realize the rigid connection of the node, which is not conducive to the stress of the structure. The splicing form of the floors adopted by the present invention can effectively realize the rigid connection of the nodes, and overcome the deficiency of the existing system.

Contents of the invention

The invention proposes a multi-high-rise assembled steel structure system belonging to the technical field of structural engineering. Its purpose is to combine modularization, factoryization, standardization and assembly in the production and construction of the steel structure system to realize factory production and rapid assembly on site. shorten the construction period and reduce the project cost.

Technical scheme of the present invention is as follows:

A multi-high-rise fabricated steel structure system that realizes just-connected joints, characterized in that the multi-high-rise fabricated steel structure system is assembled from fabricated floor slabs and fabricated flange columns using bolts; the steel structure system The joints are welded in the factory, which can realize rigid connection; the prefabricated floor is spliced by three kinds of prefabricated floors A, B and C. The advantage is that the splicing position is located in the beam where the bending moment and shear force are relatively small. The location, the joints spliced with the columns are prefabricated in the factory, which can well meet the requirements of rigid joints.

The A plate is composed of short main beam I, long main beam I, short main beam II, secondary beams, stiffening plates, floor slabs, column bases and main beam end plates; all components of the A plate are processed and manufactured in the factory , and then each member is assembled into the new prefabricated floor A by welding and shear key connection; short main beam I and short main beam II are placed vertically, and short main beam I and short main beam Ⅱ for connection, the upper and lower flange plates of the column base are respectively flush with the upper and lower flanges of short main beam Ⅰ and short main beam Ⅱ, and the two sides of the stiffening plate are respectively connected with the wings of short main beam Ⅰ and short main beam Ⅱ. The two stiffeners are connected to the upper flange and the lower flange respectively, and all the connection parts are welded; the two short main girders I are placed on the same line and connected through the column base. The up and down method of the column base The blue plate is flush with the upper and lower flanges of the two short main beams I, and all the connection parts are welded; the secondary beam is parallel to the short main beam II, perpendicular to the two short main beams I, and passes through the column seat and the stiffener It is connected with two short main beams I, the upper and lower flange plates of the column base are respectively flush with the upper and lower flanges of the secondary beam, and the two sides of the stiffening plate are respectively connected with the short main beam I and the flanges of the secondary beam. The stiffening plates are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the long main beam Ⅰ is parallel to the two short main beams Ⅰ, perpendicular to the two short main beams Ⅱ and the secondary beam, through The stiffening plate and the main beam end plate are connected with the two short main beam II and the secondary beam; the main beam end plate is located at the end of the short main beam II, and the upper and lower ends of the main beam end plate are connected with the flange One side is connected with the web of the short main beam II; the two sides of the stiffened plate are connected with the flanges of the long main beam I and the short main beam II, and the flanges connecting the long main beam I and the secondary beam, The stiffeners are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the floor is placed on the plane surrounded by each beam, and the floor is connected to each beam by using shear keys.

The B-slab is composed of long main girder I, secondary girder, stiffening plate, floor slab, main girder end plate, long main girder II and short main girder III; all components of the B-slab are processed in the factory and then passed Welding and shear key connections assemble the components into the new prefabricated floor B. The long main girder I and the short main girder III are placed vertically, and the two long main girders I and the two short main girders III are connected at the ends of the beams through the stiffening plate and the main girder end plate to form a rectangular frame; the main girder The end plate is located at the end of the short main beam III, the upper and lower ends of the main beam end plate are connected with the flange of the short main beam III, and one side is connected with the web of the short main beam III; the two sides of the stiffening plate are respectively It is connected with the flanges of the long main girder I and the short main girder III, and two stiffening plates are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the long main girder II and the long main girder The beam Ⅰ is parallel to the short main beam Ⅲ, and the long main beam Ⅱ is located in the middle of the two long main beams Ⅰ. The two ends of the long main beam Ⅱ are respectively connected to the middle of the two short main beams Ⅲ by stiffening plates. The two sides of the stiffening plate are respectively connected to the flanges of the long main beam II and the short main beam III, and the two stiffening plates are connected to the upper flange and the lower flange respectively, and all the connecting parts are welded ; The secondary beam is parallel to the short main beam III and placed vertically with the long main beam I and the long main beam II. The two sides of the stiffening plate connected to the long main beam I are respectively connected to the secondary beam and the flange of the long main beam I, and the two stiffening plates are connected to the upper flange and the lower flange respectively. The two sides of the stiffening plate at the connecting end of the main beam II are respectively connected to the flange of the secondary beam and the long main beam II, and the two stiffening plates are respectively connected to the upper flange and the lower flange, and all the connecting parts are Welding; the floor is placed on the plane surrounded by each beam, and the floor is connected to each beam by using a shear key.

The C-plate is composed of short main beam I, long main beam I, short main beam II, secondary beam, stiffening plate, floor slab, column base and main beam end plate; all components of the C-plate are processed and manufactured in the factory , and then each component is assembled into the new prefabricated floor C by welding and shear key connection. The two short main girders II are placed on the same straight line and connected by column bases. The upper and lower flanges of the column bases are respectively flush with the upper and lower flanges of the short main girder II. Opposite sides, all connections are welded; the long girder I and short girder II are vertically placed, as the other two opposite sides of the rectangular prefabricated floor C, all connections are welded; The plate connects the four sides of the C plate to form a rectangular frame. The two sides of the stiffened plate are respectively connected to the flanges of the long main beam I and the short main beam II, and the two stiffened plates are respectively connected to the upper flange and the lower flange. On the flange, all the connection parts are welded; the main beam end plate is located at the end where the short main beam II and the long main beam I are connected, and the upper and lower ends of the main beam end plate are connected with the flange of the short main beam II. One side is connected to the web of the short main beam II, and all the connection parts are welded; the ends of the two short main beams I and the two secondary beams are respectively connected to the four sides of the column base, and the up and down method of the column base The blue plate is flush with the upper and lower flanges of the two short main beams I and two secondary beams respectively, the two short main beams I are on a straight line, the two secondary beams are on a straight line, and the column seat is located in the center of the C plate. The adjacent short main beam I and the secondary beam are connected by a stiffening plate, the two sides of the stiffening plate are respectively connected with the flanges of the short main beam I and the secondary beam, and the two stiffening plates are respectively connected to the upper flange and the lower flange, all the connection parts are welded; the other end of the short main beam I is connected to the column seat in the middle of the two short main beam II, and the upper and lower flange plates of the column seat are respectively connected to the short main beam I The upper and lower flanges are flush, and the short main beam I is connected to the edge of the C plate composed of the column base and two short main beams II through the stiffener plate and the column base. The two sides of the stiffener plate are connected to the short main beam I It is connected to the flange of the short main beam II, and two stiffening plates are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the other end of the secondary beam is connected to the middle of the long main beam I, Stiffeners are used for connection, and the two sides of the stiffeners are respectively connected with the flange of the secondary beam and the long main beam I, and the two stiffeners are connected with the upper flange and the lower flange respectively, and all the connection parts are Welding; the floor is placed on the plane surrounded by each beam, and the floor is connected to each beam by using shear keys;

The column base is composed of two flange plates and a square steel pipe I, and the two flange plates are respectively located on the two ends of the square steel pipe I, and all connections are welded; the flange column is composed of a square steel pipe II and two flange plates, the two flange plates are respectively located on the two ends of the square steel pipe II, and all connections are welded; the flange column is connected with the column base to form a steel frame structure system, and all connections are connected by bolts;

The prefabricated floor plate A is spliced with the prefabricated floor plate B, and the splicing method is to splice the long main beam I of the A plate and the long main beam I of the B plate, and all the splicing uses bolts for on-site splicing; The prefabricated floor plate B is spliced with the prefabricated floor plate C. The splicing method is to splice the long main beam I of the B plate and the long main beam I of the C plate, and all the splicing uses bolts for on-site splicing; The basic constituent units of the prefabricated floor system are A board, B board and C board. The two ends of the prefabricated floor system are A board units, and the B board unit is connected to the A board unit, which is connected to the other side of the B board unit. The first is the C-slab unit, and the middle part of the floor system is the alternate splicing of the B-slab unit and the C-slab unit.

The short main beam I, short main beam II, secondary beam, long main beam II and short main beam III are H-shaped steel, or the equivalent H-shaped steel formed by splicing two channel steels back to back, or two T-shaped steels An equivalent H-shaped steel spliced together, or an equivalent H-shaped steel spliced by four angle steels; the long main girder I is a channel steel, or an equivalent channel steel spliced by two angle steels;

All the beams are shaped steel beams, or honeycomb steel beams with openings at the webs of the beams, which are convenient for various pipelines to pass through, which not only saves steel materials, but also effectively increases the net height of the house.

Beneficial effects: the multi-high-rise fabricated steel structure system that realizes node rigid connection proposed by the present invention is an innovative structural system in the steel structure system of fabricated high-rise buildings. It combines modularization, factoryization and assembly, realizes factory production, rapid assembly on site, improves construction speed, shortens construction period, reduces project cost, reduces environmental pollution, and the steel can be recycled after dismantling. It is a green Environmentally friendly structural system.

Description of drawings

Fig. 1 is the splicing plane layout diagram of the assembled floor slab of the present invention

Fig. 2 is the schematic diagram of prefabricated floor A plate of the present invention

Fig. 3 is the unit exploded view of prefabricated floor A plate of the present invention

Fig. 4 is the schematic diagram of the prefabricated floor B board of the present invention

Fig. 5 is the unit exploded view of the prefabricated floor B board of the present invention

Fig. 6 is the schematic diagram of the prefabricated floor C plate of the present invention

Fig. 7 is the unit exploded view of the prefabricated floor C plate of the present invention

Fig. 8 is an exploded view of the assembled floor column base unit of the present invention

Fig. 9 is an exploded view of the assembled flange column unit of the present invention

Fig. 10 is a schematic diagram of the opening of the beam in the prefabricated floor slab of the present invention

Fig. 11 is the assembly effect diagram of the multi-story fabricated steel structure system of the present invention

Among them: 1—short main beam Ⅰ, 2—long main beam Ⅰ, 3—short main beam Ⅱ, 4—secondary beam, 5—stiffening plate, 6—floor slab, 7—column seat, 8—main beam end plate, 9 —long main beam II, 10—short main beam III, 11—flange plate, 12—square steel pipe I, 13—flange column, 14—square steel pipe II.

Detailed ways

Below in conjunction with accompanying drawing 1-11 the present invention is described in detail:

As shown in accompanying drawings 1-11, in the multi-high-rise fabricated steel structure system proposed by the present invention to realize the rigid connection of nodes, the multi-high-rise fabricated steel structure system is assembled by using bolts to assemble floor slabs and fabricated flange columns. The basic components of the prefabricated floor system are A board, B board and C board. The C-slab unit is connected on one side, and the middle part of the floor system is alternately spliced with B-slab units and C-slab units.

As shown in accompanying drawings 2 and 3, in the multi-story fabricated steel structure system proposed by the present invention that realizes joint rigid connection, the A plate is composed of short main beam I1, long main beam I2, short main beam II3, secondary Beam 4, stiffening plate 5, floor slab 6, column base 7 and main beam end plate 8; all the components of the A plate are processed and manufactured in the factory, and then each component is assembled into the described A by welding and shear key connection. New prefabricated floor A. The short main beam I1 and the short main beam II3 are vertically placed, and the short main beam I1 and the short main beam II3 are connected by the column base 7 and the stiffening plate 5, and the upper and lower flange plates 11 of the column base 7 are respectively connected with the short main beam I1 and the The upper and lower flanges of the short main girder II3 are flush, and the two sides of the stiffening plate 5 are respectively connected to the flanges of the short main girder I1 and the short main girder II3, and the two stiffening plates 5 are respectively connected to the upper flange and the lower wing On the edge, all the connection parts are welded; the two short main beams I1 are placed on the same straight line and connected by the column base 7, the upper and lower flange plates 11 of the column base 7 are connected with the upper and lower wings of the two short main beams I1 respectively. The edges are flush, and all the connection parts are welded; the secondary beam 4 is parallel to the short main beam II3, perpendicular to the two short main beams I1, and connected to the two short main beams I1 through the column seat 7 and the stiffening plate 5. The upper and lower flange plates 11 of the seat 7 are respectively flush with the upper and lower flanges of the secondary beam 4, and the two sides of the stiffening plate 5 are respectively connected with the flanges of the short main beam I1 and the secondary beam 4, and the two stiffening plates 5 are respectively It is connected to the upper flange and the lower flange, and all the connection parts are welded; the long main beam I2 is parallel to the two short main beams I1, perpendicular to the two short main beams II3 and the secondary beam 4, and passes through the stiffening plate 5 The main beam end plate 8 is connected with the two short main beam II3 and the secondary beam 4; the main beam end plate 8 is located at the end of the short main beam II3, and the upper and lower ends of the main beam end plate 8 are connected to the The flanges are connected, and one side is connected to the web of the short main beam II3; the two sides of the stiffening plate 5 are connected to the flanges of the long main beam I2 and the short main beam II3, and connected to the long main beam I2 and the secondary beam 4 The stiffeners 5 are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the floor 6 is placed on the plane surrounded by each beam, and the floor 6 is connected to the on each beam.

As shown in accompanying drawing 4 and accompanying drawing 5, in the multi-high-rise assembled steel structure system that the present invention proposes to realize the rigid connection of joints, the B plate is composed of a long main beam I2, a secondary beam 4, a stiffening plate 5, a floor slab 6, The main beam end plate 8, the long main beam II9 and the short main beam III10; all the components of the B-slab are processed and manufactured in the factory, and then the components are assembled into the new prefabricated floor by welding and shear key connection b. The long main beam I2 and the short main beam III10 are placed vertically, and the two long main beams I2 and the two short main beams III10 are connected at the ends of the beams through the stiffening plate 5 and the main beam end plate 8 to form a rectangular frame; The main beam end plate 8 is located at the end of the short main beam III10, the upper and lower ends of the main beam end plate 8 are connected with the flange of the short main beam III10, and one side is connected with the web of the short main beam III10; the stiffening plate 5 The two sides of the main girder are respectively connected with the flanges of the long girder I2 and the short girder III10, and two stiffening plates 5 are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the long girder The main beam II9 is parallel to the long main beam I2 and placed vertically with the short main beam III10. The long main beam II9 is located in the middle of the two long main beams I2. The middle part of a short main girder III10; the two sides of the stiffening plate 5 are respectively connected with the flanges of the long main girder II9 and the short main girder III10, and two stiffening plates 5 are respectively connected to the upper flange and the lower flange. Above, all the connection parts are welded; the secondary beam 4 is parallel to the short main beam III10, placed vertically with the long main beam I2 and the long main beam II9, and the beam end of the secondary beam 4 is connected to the long main beam through the stiffening plate 5 In the middle of the beam I2 and the long main beam II9, the two sides of the stiffening plate 5 at the end where the secondary beam 4 is connected to the long main beam I2 are respectively connected to the flange of the secondary beam 4 and the long main beam I2, and two stiffening plates 5 are set. Connected to the upper flange and the lower flange respectively, the two sides of the stiffening plate 5 at the end where the secondary beam 4 is connected to the long main beam II9 are respectively connected to the flanges of the secondary beam 4 and the long main beam II9, and the two stiffeners are set The plates 5 are respectively connected to the upper flange and the lower flange, and all the joints are welded; the floor 6 is placed on the plane surrounded by each beam, and the floor 6 is connected to each beam by using a shear key.

As shown in accompanying drawings 6 and 7, in the multi-story fabricated steel structure system proposed by the present invention that realizes rigid connection of nodes, the C-plate is composed of short main girder I1, long main girder I2, short main girder II3, secondary Beam 4, stiffening plate 5, floor slab 6, column base 7 and main beam end plate 8; all components of the C plate are processed and manufactured in the factory, and then each component is assembled into the described C plate by welding and shear key connection. New prefabricated floor C. The two short main beams II3 are placed on the same straight line and connected by the column base 7. The upper and lower flange plates 11 of the column base 7 are respectively flush with the upper and lower flanges of the short main beam II3, forming a rectangular prefabricated floor plate C The two opposite sides of the slab are all connected by welding; the long girder Ⅰ2 and the short girder II3 are vertically placed as the other two opposite sides of the rectangular prefabricated floor slab C, and all connections are welded; through the stiffening plate 5 The four sides of the C plate are connected with the main beam end plate 8 to form a rectangular frame. The two sides of the stiffening plate 5 are respectively connected with the flanges of the long main beam I2 and the short main beam II3, and the two stiffening plates 5 are respectively It is connected to the upper flange and the lower flange, and all the connecting parts are welded; the main beam end plate 8 is located at the end where the short main beam II3 and the long main beam I2 are connected, and the upper and lower ends of the main beam end plate 8 are connected to the The flanges of the short main beam II3 are connected, and one side is connected with the web of the short main beam II3, and all the connection parts are welded; one end of the two short main beams I1 and two secondary beams 4 are respectively connected to the column base 7 On the four sides, the upper and lower flange plates 11 of the column base 7 are respectively flush with the upper and lower flanges of the two short main beams I1 and the two secondary beams 4, the two short main beams I1 are on a straight line, and the two secondary beams 4 The beam 4 is on a straight line, the column seat 7 is located in the center of the C plate, and the adjacent short main beam I1 and the secondary beam 4 are connected by a stiffening plate 5, and the two sides of the stiffening plate 5 are respectively connected with the short main beam I1 is connected to the flange of the secondary beam 4, and two stiffening plates 5 are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the other end of the short main beam I1 is connected to two short main beams. On the column base 7 in the middle of the beam II3, the upper and lower flange plates 11 of the column base 7 are respectively flush with the upper and lower flanges of the short main beam I1. The sides of the C plate composed of two short main girders II3 are connected, and the two sides of the stiffening plate 5 are respectively connected with the flanges of the short main girder I1 and the short main girder II3, and two stiffening plates 5 are connected to the upper flange and the short main girder II3 respectively. On the lower flange, all the connection parts are welded; the other end of the secondary beam 4 is connected to the middle part of the long main beam I2, and is connected by a stiffening plate 5, and the two sides of the stiffening plate 5 are connected with the secondary beam respectively. 4 is connected to the flange of the long main girder I2, and two stiffening plates 5 are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the floor 6 is placed on the plane surrounded by each beam, and the The shear key connects the floor 6 to each beam;

As shown in accompanying drawing 8 and accompanying drawing 9, in the multi-story assembled steel structure system proposed by the present invention to realize rigid connection of joints, the column seat 7 is composed of two flange plates 11 and a square steel pipe I12, two The flange plates 11 are respectively located on the two ends of the square steel pipe I12, and all connections are welded; the flange column 13 is composed of a square steel pipe II14 and two flange plates 11, and the two flange plates 11 are respectively located on On the two ends of the square steel pipe II14, all connections are welded; the flange column 13 is connected with the column base 7 to form a steel frame structure system, and all connections are bolted;

In the multi-high-rise assembled steel structure system proposed by the present invention that realizes node rigid connection, the assembled floor slab A and the assembled floor slab B are spliced, and the splicing method is to connect the long main beam I2 of the A slab and the B slab The long main beam I2 of the prefabricated floor is spliced, and all the splicing is carried out on-site splicing with bolts; the prefabricated floor plate B is spliced with the prefabricated floor C plate, and the splicing method is to connect the long main beam I2 of the B plate and the C plate Splicing of the long main girder Ⅰ2, all splicing shall be spliced on site with bolts;

As shown in the accompanying drawing 10, in the multi-story fabricated steel structure system that realizes rigid connection of nodes proposed by the present invention, all the beams mentioned above can adopt honeycomb steel beams with openings at the webs of the beams, which is convenient for various The pipeline goes through.

The multi-high-rise assembled steel structure system proposed by the present invention, which realizes the rigid connection of nodes, subverts the traditional steel structure residential building, and fully exerts the advantages of the steel structure residential building.

Claims (3)

1. A multi-high-rise prefabricated steel structure system that realizes node rigid connection, is characterized in that: the multi-high-rise prefabricated steel structure system is assembled by a prefabricated floor slab and a prefabricated flange column using bolts; the steel structure The nodes of the system are welded in the factory, which can realize rigid connection; the prefabricated floor is spliced by three kinds of prefabricated floors A, B and C; The A plate consists of short main beam I (1), long main beam I (2), short main beam II (3), secondary beam (4), stiffening plate (5), floor slab (6), column seat (7 ) and the main beam end plate (8); all components of the A plate are processed and manufactured in the factory, and then each component is assembled into the prefabricated floor A by welding and shear key connection; the short main beam I ( 1) and the short main beam II (3) are vertically placed, and the short main beam I (1) and the short main beam II (3) are connected through the column base (7) and the stiffening plate (5), and the column base (7) The upper and lower flange plates (11) are respectively flush with the upper and lower flanges of the short main beam I (1) and short main beam II (3), and the two sides of the stiffening plate (5) are respectively flush with the short main beam I ( 1) It is connected to the flange of the short main beam II (3), and two stiffening plates (5) are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the two short main beams I (1 ) placed on the same straight line and connected by the column base (7), the upper and lower flange plates (11) of the column base (7) are respectively flush with the upper and lower flanges of the two short main girders I (1), and all connections The parts are all welded; the secondary beam (4) is parallel to the short main beam II (3), perpendicular to the two short main beams I (1), and connected to the two short main The beam I (1) is connected, the upper and lower flange plates (11) of the column base (7) are respectively flush with the upper and lower flanges of the secondary beam (4), and the two sides of the stiffening plate (5) are respectively connected to the short main beam I (1) is connected to the flange of the secondary beam (4), and two stiffeners (5) are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the long main beam I (2) Parallel to the two short main girders I (1), perpendicular to the two short main girders II (3) and the secondary girders (4), through the stiffening plate (5) and the end plate of the main girder (8) and the two short main girders II (3) is connected to the secondary beam (4); the main beam end plate (8) is located at the end of the short main beam II (3), and the upper and lower ends of the main beam end plate (8) are connected to the short main beam II ( 3) is connected to the flange, and one side is connected to the web of the short main beam II (3); the two sides of the stiffening plate (5) are connected to the long main beam I (2) and the short main beam II (3) The flange of the long main girder I (2) and the flange of the secondary girder (4) are connected, and the stiffener plate (5) is respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the floor slab (6) Place it on the plane surrounded by each beam, and use shear keys to connect the floor (6) to each beam; The B-slab consists of long main beam I (2), secondary beam (4), stiffening plate (5), floor slab (6), main beam end plate (8), long main beam II (9) and short main beam III (10) Composition; all the components of the B slab are processed and manufactured in the factory, and then assembled into the prefabricated floor B by welding and shear key connections; the long main girder I (2) and the short main girder Ⅲ(10) is placed vertically, and the two long main beams Ⅰ(2) and two short main beams Ⅲ(10) are connected at the end of the beams through the stiffening plate (5) and the main beam end plate (8), forming Rectangular frame; the main beam end plate (8) is located at the end of the short main beam III (10), the upper and lower ends of the main beam end plate (8) are connected with the flange of the short main beam III (10), and one side It is connected with the web of the short main beam III (10); the two sides of the stiffening plate (5) are respectively connected with the flanges of the long main beam I (2) and the short main beam III (10). Stiffeners (5) are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the long main beam II (9) is parallel to the long main beam I (2), and the short main beam III ( 10) Placed vertically, the long main beam II (9) is located in the middle of the two long main beams I (2), and the two ends of the long main beam II (9) are respectively connected to the two short main beams by stiffening plates (5). The middle part of the main beam III (10); the two sides of the stiffening plate (5) are respectively connected with the flanges of the long main beam II (9) and the short main beam III (10), and the two stiffening plates (5 ) are respectively connected to the upper and lower flanges, and all the connection parts are welded; the secondary beam (4) is parallel to the short main beam III (10), and is connected to the long main beam I (2) and the long main beam II (9) is placed vertically, and the beam end of the secondary beam (4) is connected to the middle of the long main beam I (2) and the long main beam II (9) through the stiffening plate (5), and the secondary beam (4) and the long main beam The two sides of the stiffening plate (5) at the connected end of the beam I (2) are respectively connected to the flange of the secondary beam (4) and the long main beam I (2), and the two stiffening plates (5) are respectively connected to the upper On the flange and the lower flange, the two sides of the stiffening plate (5) at the end where the secondary beam (4) is connected to the long main beam II (9) are respectively connected to the wings of the secondary beam (4) and the long main beam II (9). The two stiffeners (5) are connected to the upper flange and the lower flange respectively, and all the connection parts are welded; the floor (6) is placed on the plane surrounded by each beam, and the shear resistance keys to connect the floor (6) to each beam; The C plate consists of short main beam I (1), long main beam I (2), short main beam II (3), secondary beam (4), stiffening plate (5), floor slab (6), column seat (7 ) and the main beam end plate (8); all components of the C plate are processed and manufactured in the factory, and then each component is assembled into the prefabricated floor C by welding and shear key connection; the two short The main beam II (3) is placed on the same straight line and connected by the column base (7). The upper and lower flange plates (11) of the column base (7) are respectively flush with the upper and lower flanges of the short main beam II (3). As the two opposite sides of the C-slab of the rectangular prefabricated floor, all connections are welded; the long main girder I (2) and the short main girder II (3) are vertically placed as the other two sides of the C-slab of the rectangular prefabricated floor On the opposite side, all connections are welded; the four sides of the C plate are connected through the stiffening plate (5) and the main beam end plate (8) to form a rectangular frame, and the two sides of the stiffening plate (5) are respectively connected to the long The flanges of the main girder I (2) and the short main girder II (3) are connected, and two stiffening plates (5) are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the main girder The end plate (8) is located at the end where the short main beam II (3) is connected with the long main beam I (2), and the upper and lower ends of the main beam end plate (8) are connected with the flange of the short main beam II (3). The side is connected to the web of the short main beam II (3), and all the connection parts are welded; one end of the two short main beams I (1) and two secondary beams (4) are respectively connected to the column seat (7) On the four sides of , the upper and lower flange plates (11) of the column base (7) are respectively flush with the upper and lower flanges of the two short main beams I (1) and the two secondary beams (4), and the two short main beams Ⅰ (1) is on a straight line, two secondary beams (4) are on a straight line, the column base (7) is located in the center of C plate, between adjacent short main beams Ⅰ (1) and secondary beams (4) The connection is carried out through the stiffening plate (5), the two sides of the stiffening plate (5) are respectively connected with the flanges of the short main beam I (1) and the secondary beam (4), and the two stiffening plates (5) are respectively connected in On the upper flange and the lower flange, all the connection parts are welded; the other end of the short main beam I (1) is connected to the column seat (7) in the middle of the two short main beam II (3), and the column The upper and lower flange plates (11) of the seat (7) are respectively flush with the upper and lower flanges of the short main beam I (1), and the short main beam I (1) is connected to the The seat (7) is connected to the edge of the C plate composed of two short main beams II (3), and the two sides of the stiffening plate (5) are respectively connected to the short main beam I (1) and the short main beam II (3) The two stiffeners (5) are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the other end of the secondary beam (4) is connected to the long main beam I (2 ) is connected by a stiffening plate (5), the two sides of the stiffening plate (5) are connected with the flange of the secondary beam (4) and the long main beam I (2) ) are respectively connected to the upper flange and the lower flange, and all the connection parts are welded; the floor slab (6) is placed on the plane surrounded by each beam, and the floor slab (6) is connected to each beam; The column seat (7) is composed of two flange plates (11) and a square steel pipe I (12), and the two flange plates (11) are respectively located on the two ends of the square steel pipe I (12). The connections are all welded; the flange column (13) is composed of a square steel pipe II (14) and two flange plates (11), and the two flange plates (11) are respectively located on the two ends of the square steel pipe II (14). On each end, all connections are welded; the flange column (13) is connected with the column base (7) to form a steel frame structure system, and all connections are bolted; The prefabricated floor plate A is spliced with the prefabricated floor plate B. The splicing method is to splice the long main beam I (2) of the A plate and the long main beam I (2) of the B plate. All the splicing is Bolts are used for on-site splicing; the prefabricated floor plate B is spliced with the prefabricated floor plate C, and the splicing method is to connect the long main beam I (2) of the B plate and the long main beam I (2) of the C plate Splicing, all splicing uses bolts for on-site splicing; the basic components of the prefabricated floor system are A plate, B plate and C plate, and the two ends of the prefabricated floor system are A plate units, and the A plate unit is connected It is the B-slab unit, and the C-slab unit is connected to the other side of the B-slab unit. In the middle of the floor system, the B-slab unit and the C-slab unit are spliced alternately. 2. A multi-story fabricated steel structure system that realizes rigid connection of nodes according to claim 1, characterized in that: the short main girder I (1), the short main girder II (3), the secondary girder (4 ), the long main beam II (9) and the short main beam III (10) are H-shaped steel, or the equivalent H-shaped steel formed by splicing two channel steels back to back, or the equivalent H-shaped steel formed by splicing two T-shaped steels Section steel, or an equivalent H-section steel spliced by four angle steels; the long main girder I (2) is a channel steel, or an equivalent channel steel spliced by two angle steels. 3. A multi-story prefabricated steel structure system for realizing rigid connection of nodes according to claim 1, characterized in that: all beams are shaped steel beams, or honeycomb steel beams with openings at the webs of the beams , to facilitate the passage of various pipelines.

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