Fabricated beam-column joint structure adopting T-shaped shear energy consumption 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 T-shaped shear energy consumption connecting piece, which comprises the T-shaped connecting piece made of low-yield-strength steel, the T-shaped connecting piece comprises a flange bottom plate and a web plate, and the thickness of the flange bottom plate is larger than that of the web plate. A stiffening rib is further arranged between the flange bottom plate and the web plate and is of a right triangle structure, the two right-angle sides of the stiffening rib are attached to the flange bottom plate and the web plate respectively, the web plate in the T-shaped connecting piece bears the bending moment of the beam, the L-shaped common steel connecting piece at the position of the web plate of the beam bears the shearing force of the beam, and the web plate of the T-shaped connecting piece can generate obvious shearing deformation. Due to the restraint effect of the stiffening ribs, the web of the T-shaped connecting piece cannot be bent, the advantage of high shear energy consumption of the web can be exerted, and it is guaranteed that the beam column main body structure is elastically deformed; the T-shaped connecting piece effectively solves the technical problems that in the prior art, 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 using a T-shaped shear energy-absorbing 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 T-shaped shear energy-absorbing 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 present invention provides an assembled beam-column node structure using T-shaped shear energy dissipation connectors, which adopts the following technical solutions:

[0007] A prefabricated beam-column node structure using a T-shaped shear energy-absorbing connector includes a T-shaped connector for simultaneously connecting the column flange of a steel column and the beam flange of a steel beam. The T-shaped connector is made of low-yield strength steel and includes a longitudinally extending flange base plate and a transversely extending web plate. The web plate has a shear band, and the thickness of the flange base plate is greater than the thickness of the web plate. There is also a stiffening rib between the flange base plate and the web plate. The stiffening rib is a right-angled triangle structure, and the two right-angled sides are respectively arranged in contact with the flange base plate and the web plate.

[0008] Furthermore, the stiffening rib is centrally arranged on the flange bottom plate, and two right-angled sides of the stiffening rib are respectively perpendicular to the flange bottom plate and the web plate.

[0009] 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 six high-strength bolts. After the earthquake, the bolt assembly is easy to replace, and the structure can be quickly restored to function.

[0010] Furthermore, the flange bottom plate and the web are connected together by penetration welds, and the stiffening ribs are fixed to the flange bottom plate and the web by welding.

[0011] Furthermore, the web has two strip-shaped holes, one on either side of the stiffening rib. The end of each strip-shaped hole closest to the stiffening rib also has a semicircular hole. Each strip-shaped hole opens into the side of the web, away from the stiffening rib. In the event of a major earthquake, compression occurs at the strip-shaped holes, further enhancing the bearing capacity of the flange baseplate and resisting the effects of the earthquake, thereby ensuring the bearing capacity of the node section under strong earthquakes.

[0012] Furthermore, the web also has a row of elliptical holes located on both sides of the stiffening rib, and a strip hole is provided at the center of the web at the top of the stiffening rib. The two ends of the strip hole have semicircular holes respectively, and the hole edges of the semicircular holes are flush with the hole edges of the elliptical holes on both sides of the stiffening rib.

[0013] 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.

[0014] Furthermore, the L-shaped connecting piece is made of steel.

[0015] The beneficial effects of the assembled beam-column node structure using T-type shear energy-absorbing connectors provided by the utility model are as follows: when an earthquake occurs, the T-type connector, as the weak link in the beam-column node, fully plays the role of damage control and concentrated energy consumption, the web in the T-type connector bears the bending moment of the beam, and the L-type connector at the web of the beam bears the shear force of the beam. Since the thickness of the bottom plate of the flange of the T-type connector is greater than the thickness of the web, and due to the strengthening effect of the stiffening ribs, the shear band at the elliptical opening of the web of the low-yield strength steel T-type connector will undergo obvious shear deformation, and due to the restraining effect of the stiffening ribs, the web of the T-type connector will not bend, and its advantage of strong shear energy consumption can be brought into play, ensuring that the main structure of the beam-column undergoes elastic deformation, and the connection can protect the main structure under earthquake; through the above-mentioned arrangement, the utility model effectively solves the technical problems in the prior art that the T-type connector has poor energy dissipation capacity and is prone to fatigue damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 A three-dimensional diagram of the use of the assembled beam-column node structure using a T-shaped shear energy dissipation connector provided by the utility model Figure 1 ;

[0018] Figure 2 A three-dimensional diagram of the use of the assembled beam-column node structure using a T-shaped shear energy dissipation connector provided by the utility model Figure 2 ;

[0019] Figure 3 This is a three-dimensional schematic diagram of a T-shaped connector in an assembled beam-column node structure using a T-shaped shear energy-absorbing connector provided by the present invention.

[0020] Description of reference numerals:

[0021] 1. Steel column; 2. Column flange; 3. Steel beam; 4. Beam flange; 5. T-type connector; 6. Flange base plate; 7. Web; 8. Stiffener; 9. High-strength bolt; 10. Strip hole; 11. L-type connector; 12. Semicircular hole; 13. Beam web; 14. Elliptical hole; 15. Shear band. DETAILED DESCRIPTION

[0022] 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.

[0023] It should be noted that the main idea of ​​the present invention is to use low yield strength steel to make T-type connectors, which can give full play to the advantages of low yield strength steel in terms of ductility, shear energy dissipation capacity and good low cycle fatigue performance. By improving the structure of the T-connector 5, when an earthquake occurs, the T-connector 5, as the weak link in the beam-column node, fully plays the role of damage control and concentrated energy consumption. The web 7 in the T-connector 5 bears the bending moment of the beam, and the L-shaped connector 11 at the web 13 of the beam bears the shear force of the beam. Since the thickness of the flange bottom plate 6 of the T-connector 5 is greater than the thickness of the web 7, and due to the reinforcing effect of the stiffening rib 8, the web 7 of the low-yield strength steel T-connector 5 will undergo obvious shear deformation at the shear zone 15, and due to the restraining effect of the stiffening rib 8, the web 7 of the T-connector 5 will not buckle, which can give full play to the advantage of strong shear energy consumption of low-yield strength steel, ensure that the main structure of the beam-column undergoes elastic deformation, and the connection can protect the main structure under earthquake; so as to solve the technical problem that the T-connector 5 in the prior art has poor energy consumption capacity and is prone to fatigue damage.

[0024] 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.

[0025] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0026] Example 1 of the assembled beam-column node structure using T-shaped shear energy dissipation connectors provided by the present invention:

[0027] like Figures 1 to 3 As shown, the assembled beam-column node structure using T-shaped shear energy-absorbing connectors made of low-yield strength steel includes a T-shaped 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-shaped connector is made of low-yield strength steel, and includes a longitudinally extending flange base plate 6 and a transversely extending web 7. The web 7 has a shear band 15, and the thickness of the flange base plate 6 is greater than the thickness of the web 7. There is also a stiffening rib 8 between the flange base plate 6 and the web 7. The stiffening rib 8 is a right-angled triangle structure, and the two right-angled sides are respectively arranged in contact with the flange base plate 6 and the web 7.

[0028] Regarding the arrangement of the stiffening rib 8. The stiffening rib 8 is arranged centrally on the flange base plate 6, and the two right-angled sides of the stiffening rib 8 are respectively perpendicular to the flange base plate 6 and the web 7. In other embodiments, the stiffening rib 8 may also be arranged in a non-central arrangement.

[0029] Specifically, the flange base plate 6 is connected to the column flange 2 of the steel column 1 via four high-strength bolts 9, and the web 7 is connected to the beam flange 4 via six high-strength bolts 9. 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 9 can be adjusted based on actual needs.

[0030] Regarding the formation of the flange bottom plate 6 and the web plate 7, the flange bottom plate 6 and the web plate 7 are connected together by penetration welds, and the stiffening ribs 8 are fixed to the flange bottom plate 6 and the web plate 7 by welding.

[0031] To ensure the bearing capacity of the node structure, the web 7 also has two strip holes 10 located on either side of the stiffener 8. The end of each strip hole 10 closest to the stiffener 8 also has a semicircular hole 12. Each strip hole 10 opens into the side of the web 7 away from the stiffener 8. In the event of a major earthquake, compression occurs at the strip holes 10, further enhancing the bearing capacity of the flange base plate 6 and thus ensuring the bearing capacity of the node under strong earthquakes.

[0032] The web 7 also has a row of elliptical holes 14 located on both sides of the stiffening rib 8, and a strip hole is provided at the center of the web 7 at the top of the stiffening rib 8. The two ends of the strip hole have semicircular holes 12 respectively, and the hole edges of the semicircular hole are flush with the hole edges of the elliptical holes 14 on both sides of the stiffening rib.

[0033] Finally, the entire structure includes an L-shaped connector 11, which is used to bolt the column flange 2 to the beam web 13. Bolted assembly offers the advantages of easy replacement and rapid restoration of structural functionality. In this embodiment, the L-shaped connector 11 is made of ordinary steel.

[0034] The stress mechanism of the assembled beam-column node structure using T-shaped shear energy dissipation connectors provided by the present invention is as follows:

[0035] Under a small earthquake, the T-shaped connector 5 and the L-shaped connector 11 work together to withstand the earthquake and undergo minor deformation, achieving the purpose of not being damaged by a small earthquake;

[0036] Under the constraint of the stiffening rib 8, the web 7 of the T-shaped connecting piece 5 plays the characteristics of not easy to bend and the advantage of strong energy dissipation capacity. Since the strip-shaped hole 10 and the elliptical hole 14 are arranged on the web 7, the web 7 can have a large shear plastic deformation at the shear band 15, fully dissipate the seismic energy, and protect the main structure from plastic deformation;

[0037] Under the large earthquake, the shear band 15 of the web 7 of the T-shaped connecting piece 5 will have a large shear deformation, the strip-shaped hole 10 of the web 7 will be extruded, and then the load-carrying capacity of the flange can be played, further to resist the action of the earthquake, to ensure the partial load-carrying capacity of the joint, so as to achieve the purpose of not falling under the large earthquake. In addition, under the medium earthquake and the large earthquake, the T-shaped connecting piece 5 has plastic deformation, but it is easy to recover faster after the earthquake, and the function of the structure can be quickly restored.

Claims

1. An assembled beam-column joint structure using a T-shaped shear energy dissipation connector, comprising a T-shaped 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 includes a longitudinally extending flange base plate and a transversely extending web plate. The web plate has a shear band, and the thickness of the flange base plate is greater than that of the web plate. There are also stiffening ribs between the flange base plate and the web plate. The stiffening ribs are a right-angled triangle structure, and the two right-angled sides are arranged in contact with the flange base plate and the web plate respectively.

2. The assembled beam-column node structure using T-shaped shear energy dissipation connectors according to claim 1 is characterized in that: The stiffening rib is arranged centrally on the flange base plate, and the two right-angled sides of the stiffening rib are perpendicular to the flange base plate and the web plate respectively.

3. The assembled beam-column node structure using T-shaped shear energy dissipation connectors 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 six high-strength bolts.

4. The assembled beam-column node structure using T-shaped shear energy dissipation connectors according to any one of claims 1 to 3, characterized in that: The flange bottom plate and the web plate are connected together by using a penetration weld, and the stiffening ribs are fixed to the flange bottom plate and the web plate by welding.

5. The assembled beam-column node structure using a T-shaped shear energy dissipation connector according to any one of claims 1 to 3, characterized in that: The web also has two strip holes located on both sides of the stiffening rib respectively. The end of the strip hole close to the stiffening rib also has a semicircular hole. Each strip hole opens on the side of the web away from the stiffening rib.

6. The assembled beam-column node structure using T-shaped shear energy dissipation connectors according to claim 5 is characterized in that: The web also has a row of elliptical holes located on both sides of the stiffening rib, and a strip hole is provided at the center of the web at the top of the stiffening rib. The two ends of the strip hole have semicircular holes respectively, and the hole edges of the semicircular holes are flush with the hole edges of the elliptical holes on both sides of the stiffening rib.

7. The assembled beam-column joint structure using T-shaped shear energy dissipation connectors 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.

8. The assembled beam-column node structure using T-shaped shear energy dissipation connectors according to claim 7 is characterized in that: The L-shaped connecting piece is made of steel.

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