Fabricated beam-column joint structure adopting double-step energy consumption T-shaped connecting pieces

Abstract

The utility model relates to the technical field of beam column assembly structures, in particular to an assembly type beam column joint structure adopting a double-step energy consumption T-shaped connecting piece, which comprises the T-shaped connecting piece made of low-yield-strength steel and used for simultaneously connecting a column flange of a steel column and a beam flange of a steel beam, and the T-shaped connecting piece is a double-step energy consumption piece. The flange comprises a flange bottom plate and a web plate, strip-shaped holes parallel to the flange bottom plate are formed in the web plate, and the strip-shaped holes form a perforated structure; the connecting cover plate is made of common steel, the connecting cover plate is buckled on the web plate, and the strip-shaped holes are formed in the inner side of the covering surface of the connecting cover plate; the flange bottom plate is also provided with a structure with holes; compared with the mode that a traditional T-shaped piece purely depends on a flange bottom plate or a web plate for stretching, the T-shaped piece achieves double-step energy consumption by arranging a shear energy consumption structural form on the web plate of the T-shaped piece and adding a connecting cover plate; the T-shaped connecting piece solves the technical problems that a T-shaped connecting piece is poor in energy dissipation capacity and prone to fatigue damage.

Description

Technical Field

[0001] The utility model relates to the technical field of beam-column assembly structures, in particular to an assembled beam-column node structure adopting a double-stage energy-absorbing T-shaped connector. Background Art

[0002] The beam-column joint is the intersection of the beams and columns of a frame structure and is a crucial component of a building structure. In traditional steel frame structure design, beam-column joints are often designed as rigid or hinged joints. However, numerous studies have shown that many beam-column joints are semi-rigid, falling somewhere between rigid and hinged joints. The T-connected beam-column joint is a typical example of a semi-rigid joint. As an energy-absorbing damage element, the deformation of the T-connector dissipates seismic energy during strong earthquakes, protecting the main structure of the beam or column from damage or minimal damage. However, the energy dissipation capacity of conventional T-connectors is also limited by the performance of the welds.

[0003] For example, the patent document with authorization announcement number CN211735760U discloses a prefabricated beam-column node that can be replaced after an earthquake, which includes a vertically arranged H-shaped column and an H-shaped beam with its end vertically connected to the column flange; two T-shaped connectors are symmetrically arranged between the H-shaped column and the H-shaped beam, the vertical plate of the T-shaped connector is connected to the column flange, and the horizontal plate is affixed to and fastened to the upper and lower beam flanges; a number of vertical strip holes are evenly arranged on the vertical plate, and the vertical strip holes are corresponding to the bolt holes on the column flange, and the fasteners fasten the vertical plate to the column flange through the vertical strip holes and the bolt holes; the utility model arranges vertical strip holes on the T-shaped connector to ensure that the T-shaped connector has good hysteresis energy absorption capacity.

[0004] It can be seen that the above-mentioned beam-column node adopts a T-type connector. The disadvantage of the T-type connector is that the connector relies on the deformation of the flange bottom plate to dissipate seismic energy, but the connector is prone to fracture and damage at the weld connection. The low-cycle fatigue performance of the weld determines the energy dissipation capacity of the connector, so the seismic performance of the node is limited by the welding process; if the T-type connector adopts a thickened flange bottom plate, the web is prone to buckling deformation under strong earthquakes, and is more prone to low-cycle fatigue damage. Utility Model Content

[0005] The utility model provides an assembled beam-column node structure using a double-stage energy-absorbing T-shaped connector, so as to solve the technical problems in the prior art that the T-shaped connector has poor energy-absorbing capacity and is prone to fatigue damage.

[0006] To solve the above problems, the utility model provides an assembled beam-column node structure using a double-stage energy-absorbing T-shaped connector, which adopts the following technical solutions:

[0007] A prefabricated beam-column node structure using a double-stage energy-absorbing T-shaped connector includes a T-shaped connector for simultaneously connecting a column flange of a steel column and a beam flange of a steel beam. The T-shaped connector is made of low-yield strength steel and is a double-stage energy-absorbing component. It includes a longitudinally extending flange base plate and a transversely extending web plate. The web plate is further provided with strip holes parallel to the flange base plate. The strip holes form a perforated configuration.

[0008] It also includes a connecting cover plate made of ordinary steel, which is buckled onto the web, and the strip-shaped hole is located on the inner side of the covering surface of the connecting cover plate;

[0009] The flange bottom plate is also provided with a hole configuration.

[0010] Furthermore, there are three strip-shaped holes, two of which are arranged in a collinear manner and respectively pass through the side portions of the web, and the other strip-shaped hole is located at the width center of the web.

[0011] Furthermore, the flange base plate is connected to the column flange with four high-strength bolts, and the web plate is connected to the beam flange with eight high-strength bolts. After the earthquake, the bolt assembly is easy to replace, and the structure can be quickly restored to function.

[0012] Furthermore, the flange base plate and the web are connected together by means of full penetration welds, and the connecting cover plate is connected to the web by four ordinary bolts. There are four bolt holes arranged correspondingly on the web, two of which are circular holes and the other two are oblong holes.

[0013] Furthermore, the hole configuration on the flange bottom plate includes circular holes located at non-edge positions and arc-shaped openings located at edge positions.

[0014] Furthermore, an L-shaped connector is included, which is used to connect the column flange and the beam web by bolts. The bolt assembly method has the advantages of easy replacement and rapid restoration of structural functions.

[0015] Furthermore, the L-shaped connecting piece is made of steel.

[0016] The advantageous effects of the assembled beam-column joint structure using a dual-stage energy-dissipating T-connector provided by the present invention are as follows: Under earthquake action, the dual-stage energy-dissipating low-yield-strength steel T-connector, by providing a small shear band on the web, causes the web to shear first, i.e., the web dissipates shear energy first. At this time, due to the presence of the oblong bolt holes in the connecting cover, the connecting cover is not subjected to stress and deformation. The hole-shaped configuration can maximize the shear deformation energy dissipation capacity of the web.

[0017] As the shear deformation of the web increases, the bolts at the oblong bolt holes of the connecting cover plate contact the edge of the hole. At this time, the plates on both sides of the strip holes on the side of the web are connected together through the connecting cover plate, so that the weak link of the T-type connector is transferred to the bottom flange base plate. The bottom flange base plate undergoes a large bending deformation, dissipating seismic energy through bending deformation. At this stage, the main energy dissipation is borne by the flange base plate of the T-type connector. Therefore, the T-type connector can achieve the purpose of dual-stage seismic energy dissipation. Compared with the traditional T-type connector that simply relies on the bending energy dissipation of the flange base plate or the tensile and compressive energy dissipation of the web, the shear energy dissipation structure is set on the web of the T-type connector, and the connecting cover plate is added to achieve the dual-stage energy dissipation of the T-type connector.

[0018] Through the above arrangement, the utility model effectively solves the technical problems in the prior art that T-shaped connectors have poor energy dissipation capacity and are prone to fatigue damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0020] Figure 1 A three-dimensional diagram of the application of the assembled beam-column node structure using a double-stage energy-absorbing T-shaped connector provided by the utility model Figure 1 ;

[0021] Figure 2 A three-dimensional diagram of the application of the assembled beam-column node structure using a double-stage energy-absorbing T-shaped connector provided by the utility model Figure 2 ;

[0022] Figure 3 A three-dimensional diagram of the T-shaped connector and cover plate in the assembled beam-column node structure using a double-stage energy-absorbing T-shaped connector provided by the utility model Figure 1 ;

[0023] Figure 4 A three-dimensional diagram of the T-shaped connector and cover plate in the assembled beam-column node structure using a double-stage energy-absorbing T-shaped connector provided by the utility model Figure 2 .

[0024] Description of reference numerals:

[0025] 1. Steel column; 2. Column flange; 3. Steel beam; 4. Beam flange; 5. T-type connector; 6. Flange base plate; 7. Web; 8. Strip hole; 9. Connecting cover plate; 10. High-strength bolt; 11. Round hole; 12. Arc-shaped opening; 13. L-type connector; 14. Beam web; 15. Ordinary bolt; 16. Oblong bolt hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0027] By replacing the T-shaped member in the prior art with the T-shaped connector 5 made of low-yield strength steel with a double-stage energy dissipation effect in the present application, under the action of an earthquake, the double-stage energy dissipation T-shaped connector 5 reduces the shear section on the web 7, so that the T-shaped connector 5 first undergoes shear deformation of the web 7, that is, shear energy dissipation of the web 7 occurs first. At this time, due to the presence of the oblong bolt holes 16 in the connecting cover plate 9, the connecting cover plate 9 is not subjected to force and is not deformed. The perforated configuration can give full play to the shear deformation energy dissipation capacity of the web 7; as the shear deformation of the web 7 increases, the bolts at the oblong holes 16 of the connecting cover plate 9 contact the edge of the hole. At this time, the plates on both sides of the strip holes 8 on the side of the web 7 are connected together through the connecting cover plate 9, so that the weak link of the T-type connector 5 is transferred to the bottom flange base plate 6. The bottom flange base plate 6 undergoes a large bending deformation and dissipates seismic energy through bending deformation. At this stage, the main energy dissipation is borne by the flange base plate 6 of the T-type connector 5, so the T-type connector 5 can achieve the purpose of double-stage dissipation of seismic energy; compared with the traditional T-type connector that simply relies on the bending energy dissipation of the flange base plate 6 or the tensile and compressive energy dissipation of the web 7, by arranging a shear energy dissipation structure on the web 7 of the T-type connector 5 and adding the connecting cover plate 9, the double-stage energy dissipation of the T-type connector 5 is achieved; so as to solve the technical problems in the prior art that the T-type connector 5 has poor energy dissipation capacity and is prone to fatigue damage.

[0028] After introducing the basic principles of the present invention, various non-limiting embodiments of the present invention are described in detail below. The numbers of any elements in the drawings are for illustration only and not for limitation, and any names are for distinction only and do not have any limiting meaning.

[0029] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0030] The utility model provides an embodiment of an assembled beam-column node structure using a double-stage energy-absorbing T-shaped connector:

[0031] like Figures 1 to 3 As shown, the assembled beam-column node structure using a double-stage energy-absorbing T-type connector includes a T-type connector 5 for simultaneously connecting the column flange 2 of the steel column 1 and the beam flange 4 of the steel beam 3. The T-type connector 5 is made of low-yield strength steel and is a double-stage energy-absorbing part. It includes a longitudinally extending flange base plate 6 and a transversely extending web 7. The web 7 is also provided with a strip hole 8 parallel to the flange base plate 6, and the strip hole 8 constitutes a hole-shaped configuration; it also includes a connecting cover plate 9 made of ordinary steel, which is buckled on the web 7, and the strip hole 8 is located on the inner side of the covering surface of the connecting cover plate 9; the flange base plate 6 is also provided with a hole-shaped configuration, and the web 7 is also provided with a shear band.

[0032] Regarding the strip-shaped holes 8 , there are three strip-shaped holes 8 , two of which are arranged in a collinear manner and respectively pass through the sides of the web 7 , and the other strip-shaped hole 8 is located at the width center of the web 7 .

[0033] Regarding the arrangement of the flange base plate 6, it is connected to the column flange 2 of the steel column 1 via four high-strength bolts 10, while the web 7 is connected to the beam flange 4 via eight high-strength bolts 10. After the earthquake, the bolt assembly allows for easy replacement, allowing for rapid restoration of structural functionality. In other embodiments, the number of high-strength bolts can be adjusted based on actual needs.

[0034] In addition, the flange base plate 6 and the web 7 are connected together by means of full penetration welds, and the connecting cover plate 9 is connected to the web 7 by four ordinary bolts 15. There are four bolt holes correspondingly arranged on the web, two of which are circular and the other two are oblong bolt holes 16.

[0035] Regarding the hole configuration on the flange bottom plate 6, the hole configuration on the flange bottom plate 6 includes a circular hole 11 located at a non-edge position and an arc-shaped opening 12 located at an edge position.

[0036] Finally, the entire structure includes an L-shaped connector 13, which is used to bolt the column flange 2 to the beam web 14. Bolted assembly offers the advantages of easy replacement and rapid restoration of structural functionality. In this embodiment, the L-shaped connector 13 is made of ordinary steel.

[0037] The force mechanism of the assembled beam-column node structure using the double-stage energy-absorbing T-shaped connector provided by the present invention is as follows:

[0038] Under a small earthquake, the T-shaped connector 5 and the L-shaped connector 13 work together to withstand the earthquake and undergo minor deformation, achieving the purpose of not being damaged by a small earthquake;

[0039] Under moderate earthquakes, the web 7 of the T-shaped connector 5 undergoes shear deformation. Under the action of the connecting cover 9, the web 7 is not easily buckled and the seismic energy is dissipated through shear deformation, protecting the main structure from plastic deformation.

[0040] Under a major earthquake, the web 7 of the T-connector 5 undergoes significant shear deformation. The design of the oblong bolt holes 16 on the web 7 allows the cover plate to begin to intervene in the stress of the web 7 of the T-connector 5. It can bear part of the stress of the web 7 and limit the shear deformation of the web 7. At this time, the flange base plate 6 of the T-connector 5 becomes a weak link and begins to dissipate energy through bending deformation. At the same time, the web 7 can also dissipate part of the energy through limited shear deformation. The two work together to dissipate the energy of the major earthquake. This achieves the goal of not collapsing in a major earthquake. In addition, under moderate and major earthquakes, the T-connector 5 undergoes plastic deformation, but it is more likely to recover faster after the earthquake, and the function of the structure can be quickly restored.

[0041] This new type of double-stage energy dissipation T-type connector 5 can realize rapid assembly connection during the construction of beam-column nodes, as well as rapid repair after an earthquake. Through reasonable design, the web 7 in the T-type connector 5 first undergoes shear deformation to dissipate earthquake energy. Under larger deformation, the energy dissipation of the flange bottom plate 6 of the T-type connector 5 is achieved through the action of the connecting cover plate 9, thereby achieving the purpose of double-stage energy dissipation. The design of the connecting cover plate 9 can suppress the buckling of the web 7 of the T-type connector 5, and the design of the oblong bolt hole 16 in the web 7 can limit the shear deformation of the web 7 to a certain range, thereby preventing the web 7 from breaking and damaging before the second-stage energy dissipation of the flange.

[0042] This double-stage energy dissipation T-type connector 5 uses low-yield strength steel, which can give full play to the advantages of low-yield strength steel in deformation ability and strong energy dissipation capacity, as well as excellent low-cycle fatigue performance, and provide a new type of assembled beam-column node with double-stage energy dissipation T-type connector, realizing high energy dissipation and easy replacement of the beam-column node shock-absorbing structure, further compensating for the defect of conventional T-type connectors relying solely on the web 7 or flange for energy dissipation, and solving the problem that conventional T-type connectors are prone to low-cycle fatigue fracture damage at the welding point between the web and the flange.

Claims

1. An assembled beam-column joint structure using a double-stage energy-dissipating T-connector, comprising a T-connector for simultaneously connecting a column flange of a steel column and a beam flange of a steel beam, characterized in that: The T-shaped connector is made of low-yield strength steel and is a two-stage energy dissipation component. It includes a longitudinally extending flange base plate and a transversely extending web plate. The web plate is also provided with strip holes parallel to the flange base plate. The strip holes form a perforated configuration. It also includes a connecting cover plate made of ordinary steel, which is buckled onto the web, and the strip-shaped hole is located on the inner side of the covering surface of the connecting cover plate; The flange bottom plate is also provided with a hole configuration.

2. The assembled beam-column node structure using a double-stage energy-dissipating T-shaped connector according to claim 1 is characterized in that: There are three strip-shaped holes, two of which are arranged in a collinear manner and respectively pass through the side portions of the web, and the other strip-shaped hole is located at the width center of the web.

3. The assembled beam-column node structure using a double-stage energy-dissipating T-shaped connector according to claim 2 is characterized in that: The flange bottom plate is connected to the column flange of the steel column through four high-strength bolts, and the web is connected to the beam flange through eight high-strength bolts.

4. The assembled beam-column node structure using a double-stage energy-absorbing T-shaped connector according to any one of claims 1 to 3, characterized in that: The flange bottom plate and the web are connected together by means of full penetration welds, and the connecting cover plate is connected to the web by four ordinary bolts. There are four bolt holes arranged correspondingly on the web, two of which are circular holes and the other two are oblong holes.

5. The assembled beam-column node structure using a double-stage energy-absorbing T-shaped connector according to any one of claims 1 to 3, characterized in that: The hole configuration on the flange bottom plate includes circular holes located at non-edge positions and arc-shaped openings located at edge positions.

6. The assembled beam-column node structure using a double-stage energy-absorbing T-shaped connector according to any one of claims 1 to 3, characterized in that: Also included are L-shaped connectors used to connect column flanges and beam webs via bolts.

7. The assembled beam-column node structure using a double-stage energy-dissipating T-shaped connector according to claim 6 is characterized in that: The L-shaped connecting piece is made of steel.

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