CN118461765A - Full prefabricated steel tube concrete column-PEC beam assembled rigid joint and preparation method - Google Patents
Full prefabricated steel tube concrete column-PEC beam assembled rigid joint and preparation method Download PDFInfo
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- CN118461765A CN118461765A CN202410515595.8A CN202410515595A CN118461765A CN 118461765 A CN118461765 A CN 118461765A CN 202410515595 A CN202410515595 A CN 202410515595A CN 118461765 A CN118461765 A CN 118461765A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/185—Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
一种全预制钢管混凝土柱‑PEC梁装配式刚接节点及制备方法，属于装配式建筑工程技术领域，包括预制钢管混凝土柱和预制PEC梁。所述预制钢管混凝土柱被上隔板和下隔板贯穿，并与柱端纵向腹板焊接形成柱端短箱梁；所述预制PEC梁端部设置封盖板，封盖板外侧翼缘板与梁端纵向腹板焊接形成梁端短箱梁；所述柱端短箱梁和梁端短箱梁通过翼缘外连接板、腹板外连接板和高强螺栓进行拼接装配。本发明钢管混凝土柱和PEC梁均能实现工厂预制后现场直接装配，解决传统PEC结构梁柱节点现场焊接及混凝土二次浇筑问题，避免湿作业，提高施工效率和施工质量。
A fully prefabricated steel tube concrete column-PEC beam assembled rigid joint and preparation method, belonging to the field of assembled building engineering technology, including prefabricated steel tube concrete column and prefabricated PEC beam. The prefabricated steel tube concrete column is penetrated by an upper partition and a lower partition, and is welded with the longitudinal web of the column end to form a short box beam at the column end; a cover plate is arranged at the end of the prefabricated PEC beam, and the outer flange plate of the cover plate is welded with the longitudinal web of the beam end to form a short box beam at the beam end; the short box beam at the column end and the short box beam at the beam end are spliced and assembled by flange external connection plates, web external connection plates and high-strength bolts. The steel tube concrete column and PEC beam of the present invention can be directly assembled on site after factory prefabrication, solving the problems of on-site welding and secondary pouring of concrete at the beam-column node of the traditional PEC structure, avoiding wet operations, and improving construction efficiency and quality.
Description
Technical Field
The invention relates to the technical field of assembly type constructional engineering, in particular to a fully prefabricated concrete filled steel tubular column-PEC beam assembly type rigid joint and a preparation method thereof.
Background
In order to reduce the wet operation of a construction site, the green development concept is practiced, the sustainable development of the building industry is realized, the country is greatly pushing energy-saving, environment-friendly and efficient assembled building, and based on the assembled building, the partially-coated steel-concrete combined structure (PEC structure) is applied to the fields of large-span structures, high-rise buildings and the like due to the easy assembly.
The PEC structure is a combined structure formed by welding connecting rods and longitudinal ribs in H-shaped steel and pouring concrete, and has the advantages of high bearing capacity, easiness in assembly, good fire resistance and corrosion resistance and the like. On the one hand, the beam column rigid connection node of the traditional PEC structure adopts a bolt welding connection mode, so that spot welding work exists, and the construction quality is difficult to guarantee; on the other hand, the node area needs procedures such as binding reinforcing steel bars, supporting a formwork, secondary pouring concrete and the like, wet operation exists, the green development concept is not met, and compared with a PEC structure Liang Zhujiang shaft node, the weak shaft node is relatively poor in bearing capacity and ductility due to the fact that belly concrete lacks of section steel constraint.
The method solves the problems that the rigid joint of the beam column of the traditional PEC structure has the defects, fully exerts the material performance of the component, improves the relatively poor bearing capacity and ductility of the weak shaft joint, and realizes the complete assembly production, which is the problem to be solved urgently at present.
Disclosure of Invention
The invention discloses a fully prefabricated steel tube concrete column-PEC beam assembled rigid joint and a preparation method thereof, wherein a PEC column is replaced by a prefabricated steel tube concrete column, and a fully bolted connection mode is adopted, so that the problems of the beam column rigid joint of the traditional PEC structure can be solved, and the fully prefabricated assembled production is realized.
In order to achieve the above purpose, the invention adopts the following technical means:
The utility model provides a full prefabricated steel core concrete column-PEC roof beam assembled rigid connection node which characterized in that: the prefabricated steel tube concrete column comprises a prefabricated steel tube concrete column and a prefabricated PEC beam, wherein the node area of the prefabricated steel tube concrete column is penetrated by an upper partition plate and a lower partition plate and welded with a longitudinal web plate at the outer column end to form a column end short box beam; the end part of the prefabricated PEC beam is provided with a cover plate, and an outer side flange plate of the cover plate is welded with a longitudinal web of the outer beam end to form a short beam end box beam; the short box girder at the column end and the short box girder at the beam end are spliced and assembled through a flange outer connecting plate, a flange high-strength bolt, a web outer connecting plate and a web high-strength bolt.
Further, the prefabricated steel pipe concrete column steel pipe is welded with the upper partition plate and the lower partition plate in a penetration way, the upper partition plate and the lower partition plate are provided with concrete grouting holes with the thickness of not less than 200mm and ventilation holes with the thickness of not less than 25mm, and the overhanging length l is preferably 40-60 mm.
Further, the thicknesses of the upper partition plate and the lower partition plate are consistent with the thickness of the flange of the short box girder at the column end; the thickness of the flange of the short box girder at the column end is consistent with that of the flange of the short box girder at the girder end; the thickness of the short box girder web at the column end is consistent with that of the short box girder web at the girder end.
Furthermore, the flanges of the short box girder at the column end and the flanges of the short box girder at the girder end are provided with a plurality of flange bolt holes, and are spliced and assembled through flange outer connecting plates and flange high-strength bolts.
Further, a plurality of web bolt pore channels are formed in the column end longitudinal web and the beam end longitudinal web, and the column end longitudinal web and the beam end longitudinal web are assembled by splicing web external connecting plates and web high-strength bolts.
The design of the connecting plate and the bolt at the connecting position adopts an equal-strength connecting design method, the connecting strength is higher than that of the test piece, and the safe and reliable connection is ensured.
Further, the thicknesses of the column end longitudinal web and the beam end longitudinal web can be adjusted according to actual conditions, so that the bending rigidity and the bending bearing capacity of the column end short box girder and the beam end short box girder are not smaller than those of the prefabricated PEC girder, and the thicknesses of the column end longitudinal web and the beam end longitudinal web can be properly increased to meet the design concept of strong-node weak components, so that the purpose of outward movement of the plastic hinge is achieved.
On the other hand, the invention also discloses a fully prefabricated steel tube concrete column-PEC beam assembled rigid joint and a preparation method thereof, comprising the following steps:
S1, respectively reserving concrete grouting holes, ventilation holes and flange bolt pore channels on an upper partition plate and a lower partition plate, and welding with a steel pipe in a penetration manner to form a prefabricated steel pipe concrete column profile steel skeleton;
s2, welding a column end longitudinal web plate between the upper partition plate and the lower partition plate, reserving a web plate bolt pore canal on one side of the column end longitudinal web plate, and welding the other side of the column end longitudinal web plate with the outer wall of the steel pipe to form a column end short box girder;
S3, arranging sealing plates at two ends of the H-shaped steel beam to form two cavities, arranging beam longitudinal ribs in the cavities, overlapping the two ends of the beam longitudinal ribs on the welding plates, arranging a plurality of C-shaped connecting rods at certain intervals outside the beam longitudinal ribs, welding the bent sections of the C-shaped connecting rods at the inner sides of the flange plates of the H-shaped steel beam, and connecting the H-shaped steel beam, the sealing plates, the welding plates, the beam longitudinal ribs and the C-shaped connecting rods into a whole to form a prefabricated PEC beam profile steel framework;
s4, reserving flange bolt pore canals at the end parts of the flange plates of the H-shaped steel beams, welding longitudinal webs at the beam ends at the outer sides of the cover plates, and reserving the flange bolt pore canals at the other sides to form short box beams at the beam ends;
S5, pouring beam filling concrete in the cavity of the prefabricated PEC beam profile steel skeleton, and pouring column filling concrete in the prefabricated steel tube concrete column profile steel skeleton, wherein the beam filling concrete needs to be poured on two sides, and pouring the other side after the concrete strength of one side reaches 70% of yield strength;
S6, pre-screwing flange high-strength bolts at flange plates of the beam end short box beams and the column end short box beams, pre-screwing web high-strength bolts at column end longitudinal webs and beam end longitudinal webs, and pre-spot-welding the heads of the high-strength bolts on the inner sides of the box bodies to ensure that falling does not occur in the transportation and hoisting processes;
And S7, transporting the prefabricated steel tube concrete column and the prefabricated PEC beam to the site, and carrying out site assembly by using the flange outer connecting plate, the web outer connecting plate, the flange high-strength bolts and the web high-strength bolts.
The advantages of the invention are mainly expressed in the following aspects:
1. The invention adopts the combination form of the prefabricated steel tube concrete column and the prefabricated PEC beam, and solves the problems of relatively poor bearing capacity and ductility of the weak-axis node of the traditional PEC structure by utilizing the interaction between the steel tube concrete column and the concrete.
2. According to the invention, full-bolt connection is adopted, the steel tube concrete column and the PEC beam are prefabricated in a factory, the construction site is only required to be installed by adopting a connecting plate and a high-strength bolt, the construction efficiency is greatly improved, and the site construction steps are simplified.
3. The invention adopts a dry operation construction mode, solves the problems that the node area of the beam column of the traditional PEC structure needs to be bound with reinforcing steel bars, supported by a formwork, concreted for the second time and the like, saves energy and protects the environment in the construction process, and accords with the green development concept of the fabricated building.
4. The invention adopts the beam end short box beam and the column end short box beam to connect the prefabricated steel pipe concrete column and the prefabricated PEC beam, and can construct the different rigidity and bearing capacity ratio of the prefabricated PEC beam and the short box beam section by adjusting the thickness of the longitudinal web of the beam end short box beam and the column end short box beam, thereby enhancing the rigidity and bearing capacity of the beam end of the node domain, leading the thin and weak surface of the beam end to be far away from the node domain and meeting the design concept of strong-node weak components.
5. Compared with the traditional PEC structure beam column rigid joint node, the invention adopts full-bolt connection, the rotation capacity of the node is enhanced, and the ductility and the energy consumption capacity are increased.
Drawings
For a clearer description of the technical solutions of the present invention, the following brief description is given to the drawings in the description of the prior art or the embodiments:
FIG. 1 is a schematic view of an assembled rigid joint node of a fully prefabricated concrete filled steel tubular column-PEC beam;
FIG. 2 is a schematic view of a fully prefabricated concrete filled steel tubular column-PEC beam assembled rigid-joint node steel skeleton structure;
FIG. 3 is an elevation view of a fully precast concrete filled steel tubular column-PEC beam assembled rigid joint;
FIG. 4 is a top view of a fully precast concrete filled steel tubular column-PEC beam assembled rigid joint;
FIG. 5 is a schematic view of a precast concrete filled steel tubular column;
FIG. 6 is a schematic view of a prefabricated PEC beam structure;
FIG. 7 is a schematic view of a flange outer web and a web outer web;
FIG. 8 is a schematic view of a section steel skeleton structure according to a second embodiment of the present invention;
Fig. 9 is an assembly schematic diagram of a second embodiment of the present invention.
In the figure: 1. precast steel pipe concrete column 2, precast PEC beams 3, upper separator 4, lower separator 5, column end longitudinal web 6, beam end longitudinal web 7, steel pipe 8, column filled concrete, 9, h-beam, 10, beam longitudinal bar 11, c-shaped tie 12, closure plate 13, welded plate 14, beam filled concrete 15, flange outer web 16, flange high strength bolts 17, web outer web 18, web high strength bolts 19, flange bolt channels 20, web bolt channels 21, flange connecting web bolt channels 22, web connecting web bolt channels 23, column end short box beams 24, beam end short box beams 25, mounting holes 26, flange inner web 27, web inner web
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention.
The invention discloses a full prefabricated steel tube concrete column-PEC beam assembled rigid joint, which comprises a prefabricated steel tube concrete column 1 and a prefabricated PEC beam 2, wherein the joint area of the prefabricated steel tube concrete column 1 is penetrated by an upper partition plate 3 and a lower partition plate 4 and forms a column end short box beam 23 with an external column end longitudinal web 5; the end part of the prefabricated PEC beam 2 is provided with a cover plate 12, and a beam end short box beam 24 is formed by an outer side flange plate of the cover plate 12 and an outer beam end longitudinal web 6; the short column-end box girder 23 and the short beam-end box girder 24 are assembled through the flange outer connecting plate 15, the flange high-strength bolts 16, the web outer connecting plate 17 and the web high-strength bolts 18.
Example 1
As shown in fig. 1-7, the prefabricated steel tube concrete column 1 comprises a steel tube 7 arranged along the length direction of the column body and column filling concrete 8 poured in the steel tube, the steel tube 7 is welded with an upper partition plate 3 and a lower partition plate 4 in a penetration manner, and the upper partition plate 3 and the lower partition plate 4 are welded with an external column end longitudinal web 5 to form a column end short box girder 23.
The prefabricated PEC beam 2 comprises an H-shaped steel beam 9 and beam longitudinal ribs 10 which are arranged along the length direction of the beam, wherein a plurality of beam longitudinal ribs 10 are arranged along two cavities of the H-shaped steel beam 9, and a plurality of C-shaped connecting rods 11 are arranged along a certain interval outside the beam longitudinal ribs 10; the H-shaped steel beam 9, the beam longitudinal ribs 10, the C-shaped connecting rods 11 and the beam filling concrete 14 are connected into a whole to form the prefabricated PEC beam 2.
The end of the prefabricated PEC beam 2 is provided with a cover plate 12, a beam end longitudinal web 6 is welded outside the cover plate 12, and a beam end short box beam 24 is formed by the cover plate and a flange plate at the end of the prefabricated PEC beam 2.
The flanges of the short column-end box beams 24 and the flanges of the short column-end box beams 23 are provided with a plurality of flange bolt holes 19, the flange bolt holes 19 and the flange high-strength bolts 16 are spliced and assembled through the flange outer connecting plates 15, the number of the flange bolt holes 19 and the number of the flange high-strength bolts 16 are set to meet the strength requirement, the flange outer connecting plates 15 are provided with the same number of flange connecting plate bolt holes 21, and the size of the flange outer connecting plates 15 is consistent with that of the beam flanges.
The column end longitudinal web 5 and the beam end longitudinal web 6 are provided with a plurality of web bolt pore channels 20, the web bolt pore channels 20 and the web high-strength bolts 18 are arranged to meet the strength requirement through splicing and assembling of web outer connecting plates 17 and web high-strength bolts 18, the web outer connecting plates 17 are provided with the same number of web connecting plate bolt pore channels 22, and the size of the web outer connecting plates 17 is consistent with that of the beam web.
Meanwhile, the first embodiment provides a preparation method of the assembled rigid joint of the full precast concrete filled steel tubular column-PEC beam, comprising the following steps:
S1, respectively reserving concrete grouting holes, ventilation holes and flange bolt pore channels 19 on an upper partition plate 3 and a lower partition plate 4, and performing penetration welding with a steel pipe 7 to form a steel skeleton of the prefabricated steel pipe concrete column 1;
S2, welding a column end longitudinal web 5 between the upper partition plate 3 and the lower partition plate 4, reserving a web bolt pore channel 20 on one side of the column end longitudinal web 5, and welding the other side of the column end longitudinal web 5 with the outer wall of the steel pipe 7 to form a column end short box girder 23;
S3, arranging sealing plates 12 at two ends of the H-shaped steel beam 9 to form two cavities, arranging beam longitudinal ribs 10 in the cavities, overlapping two ends of the beam longitudinal ribs 10 on welding plates 13, arranging a plurality of C-shaped connecting rods 11 at certain intervals outside the beam longitudinal ribs 10, welding bent sections of the C-shaped connecting rods 11 at the inner sides of flange plates of the H-shaped steel beam 9, and connecting the H-shaped steel beam 9, the sealing plates 12, the welding plates 13, the beam longitudinal ribs 10 and the C-shaped connecting rods 11 into a whole to form a prefabricated PEC beam 2 steel skeleton;
S4, reserving flange bolt pore channels 19 at the end part of a flange plate of the H-shaped steel beam 9, welding a beam end longitudinal web 6 at the outer side of the cover plate 12, and reserving the flange bolt pore channels 19 at the other side to form a beam end short box beam 24;
S5, pouring beam filling concrete 14 in the cavity of the prefabricated PEC beam 2 type steel skeleton, pouring column filling concrete 8 in the prefabricated steel tube concrete column 1 type steel skeleton, wherein the beam filling concrete 14 needs to be poured on two sides, and pouring the other side after the concrete strength of one side reaches 70% of yield strength;
s6, pre-screwing flange high-strength bolts 16 at flange plates of the beam end short box beams 24 and the column end short box beams 23, pre-screwing web high-strength bolts 18 at column end longitudinal webs 5 and beam end longitudinal webs 6, and ensuring that falling does not occur in the transportation and hoisting processes;
And S7, transporting the prefabricated steel tube concrete column 1 and the prefabricated PEC beam 2 to the site, and carrying out site assembly through the flange outer connecting plate 15, the web outer connecting plate 17, the flange high-strength bolts 16 and the web high-strength bolts 18.
Example two
As shown in fig. 8-9, on the basis of the first embodiment, the installation holes are formed in the column end longitudinal web, the installation holes meet the requirements of the steel structural design specification, the flange outer connecting plate and the flange inner connecting plate are connected with the flange of the H-shaped steel beam through flange high-strength bolts, and the web outer connecting plate and the web inner connecting plate assemble the beam end longitudinal web and the column end longitudinal web together through web high-strength bolts.
In the preparation process of the second node, a web bolt pore 20 is reserved on one side of a longitudinal web 5 at a column end, a mounting hole 25 is formed in the other side, a flange inner connecting plate 26 is mounted at a flange plate of a short box girder at the girder end, a flange high-strength bolt 16 is pre-screwed, a web inner connecting plate 27 is mounted at a longitudinal web 6 at the girder end, a web high-strength bolt 18 is pre-screwed, the fact that falling off does not occur in the transportation and hoisting processes is guaranteed, the pre-tightening high-strength bolt is loosened during assembly, and site assembly is carried out through the mounting hole 25 by using the flange outer connecting plate 15, the flange inner connecting plate 26, the web outer connecting plate 17, the web inner connecting plate 27, the flange high-strength bolt 16 and the web high-strength bolt 18, and the fact that the high-strength bolt reaches the pre-tightening force is guaranteed.
In the patent, the reliability of the full-bolt connection is ensured, the connection calculation adopts an equal-strength connection design method, the high-strength friction bolt is required to reach the expected pretightening force, the processing method of the contact surface of the connecting part component meets the standard requirement, and the rigidity of the connecting part meets the rigid joint judgment standard.
In this patent, steel core concrete column end adopts baffle through connection form, and PEC beam end moment of flexure and shear force can be passed into the steel core concrete column inside, and the power transmission route is clear and reliable, of course, to steel core concrete column other traditional connection forms, like interior baffle, outer annular plate type etc. equally be applicable to this patent.
The above selected embodiments are merely intended to help illustrate the invention. The examples selected do not detail all of the invention nor limit the invention to the specific form described. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention.
Claims (8)
1. The full prefabricated steel tube concrete column-PEC beam assembled rigid joint comprises a prefabricated steel tube concrete column (1) and a prefabricated PEC beam (2), wherein the joint area of the prefabricated steel tube concrete column (1) is penetrated by an upper partition plate (3) and a lower partition plate (4) and forms a column end short box beam (23) with an external column end longitudinal web plate (5); a cover plate (12) is arranged at the end part of the prefabricated PEC beam (2), and a beam end short box beam (24) is formed by an outer side flange plate of the cover plate (12) and an outer beam end longitudinal web (6); the short box girder (23) at the column end and the short box girder (24) at the girder end are spliced and assembled through a flange outer connecting plate (15), a flange high-strength bolt (16), a web outer connecting plate (17) and a web high-strength bolt (18);
Two sealing plates (12) are arranged at two ends of an H-shaped steel beam (9) to form two cavities, beam longitudinal ribs (10) are arranged in the cavities, two ends of the beam longitudinal ribs (10) are lapped on welding plates (13), a plurality of C-shaped connecting rods (11) are arranged at the outer sides of the beam longitudinal ribs (10) along a certain distance, bent sections of the C-shaped connecting rods (11) are welded at the inner sides of flange plates of the H-shaped steel beam (9), and the H-shaped steel beam (9), the sealing plates (12), the welding plates (13), the beam longitudinal ribs (10) and the C-shaped connecting rods (11) are connected into a whole to form a prefabricated PEC beam (2) steel skeleton.
2. A fully precast concrete filled steel tubular column-PEC beam assembled rigid joint according to claim 1, characterized in that: the prefabricated steel tube concrete column (1) is welded with the upper partition plate (3) and the lower partition plate (4) in a penetration way, and the upper partition plate (3) and the lower partition plate (4) are provided with concrete grouting holes and ventilation holes.
3. A fully precast concrete filled steel tubular column-PEC beam assembled rigid joint according to claim 1, characterized in that: the thickness of the flange of the short box girder (23) at the column end is consistent with that of the flange of the short box girder (24) at the girder end; the web thickness of the short column end box girder (23) is consistent with the web thickness of the short column end box girder (24).
4. A fully precast concrete filled steel tubular column-PEC beam assembled rigid joint according to claim 1, characterized in that: the flanges of the short box beams (24) at the column ends and the flanges of the short box beams (23) at the beam ends are provided with a plurality of flange bolt holes (19), and are assembled in a spliced mode through the flange outer connecting plates (15) and the flange high-strength bolts (16).
5. A fully precast concrete filled steel tubular column-PEC beam assembled rigid joint according to claim 1, characterized in that: the column end longitudinal web (5) and the beam end longitudinal web (6) are provided with a plurality of web bolt pore channels (20), and are assembled in a spliced mode through web outer connecting plates (17) and web high-strength bolts (18).
6. A fully precast concrete filled steel tubular column-PEC beam assembled rigid joint according to claim 5, characterized in that: the flange outer connecting plate (15), the flange high-strength bolts (16), the web outer connecting plate (17) and the web high-strength bolts (18) are designed by adopting an equal-strength connection design method, so that the connection reliability is ensured.
7. A fully precast concrete filled steel tubular column-PEC beam assembled rigid joint according to claim 1, characterized in that: the thicknesses of the column end longitudinal webs (5) and the beam end longitudinal webs (6) must ensure that the bending rigidity and the bending bearing capacity of the column end short box beams (23) and the beam end short box beams (24) are not smaller than those of the prefabricated PEC beams (2).
8. Preparing the fully prefabricated concrete filled steel tube column-PEC beam assembly rigid joint according to claim 1, wherein: comprises the following steps:
s1, respectively reserving concrete grouting holes, ventilation holes and flange bolt pore channels (19) on an upper partition plate (3) and a lower partition plate (4), and performing penetration welding with a steel pipe (7) to form a profile steel framework of the prefabricated steel pipe concrete column (1);
s2, welding a column end longitudinal web plate (5) between the upper partition plate (3) and the lower partition plate (4), reserving a web bolt pore passage (20) on one side of the column end longitudinal web plate (5), and welding the other side of the column end longitudinal web plate with the outer wall of the steel pipe (7) to form a column end short box girder (23);
S3, arranging sealing plates (12) at two ends of an H-shaped steel beam (9) to form two cavities, arranging beam longitudinal ribs (10) in the cavities, overlapping two ends of the beam longitudinal ribs (10) on a welding plate (13), arranging a plurality of C-shaped connecting rods (11) at a certain interval outside the beam longitudinal ribs (10), welding the bent sections of the C-shaped connecting rods (11) at the inner sides of flange plates of the H-shaped steel beam (9), and connecting the H-shaped steel beam (9), the sealing plates (12), the welding plate (13), the beam longitudinal ribs (10) and the C-shaped connecting rods (11) into a whole to form a prefabricated PEC beam (2) steel skeleton;
s4, reserving flange bolt pore channels (19) at the end parts of flange plates of the H-shaped steel beams (9), welding a longitudinal web (6) at the beam end at the outer side of the cover plate (12), and reserving the flange bolt pore channels (19) at the other side to form a beam end short box beam (24);
s5, pouring beam filling concrete (14) in the cavity of the profile steel skeleton of the prefabricated PEC beam (2), and pouring column filling concrete (8) in the profile steel skeleton of the prefabricated steel tube concrete column (1), wherein the beam filling concrete (14) needs to be poured on two sides, and the other side is poured after the concrete strength of one side reaches 70% of yield strength;
S6, pre-screwing a flange high-strength bolt (16) at a flange plate of the beam end short box beam (24) and a flange high-strength bolt of the column end short box beam (23), pre-screwing a web high-strength bolt (18) at a column end longitudinal web (5) and a beam end longitudinal web (6), and pre-spot-welding the heads of the high-strength bolts on the inner side of the box body;
And S7, transporting the prefabricated steel tube concrete column (1) and the prefabricated PEC beam (2) to the site, and carrying out site assembly by using a flange outer connecting plate (15), a web outer connecting plate (17), a flange high-strength bolt (16) and a web high-strength bolt (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410515595.8A CN118461765A (en) | 2024-04-26 | 2024-04-26 | Full prefabricated steel tube concrete column-PEC beam assembled rigid joint and preparation method |
Applications Claiming Priority (1)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN121556635A (en) * | 2025-12-08 | 2026-02-24 | 启迪设计集团股份有限公司 | Concrete column corner external steel beam connection structure and construction method thereof |
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