Fabricated steel structure beam-column joint with replaceable arc-shaped energy consumption plates

Abstract

The invention relates to an assembly type steel structure beam-column joint with replaceable arc-shaped energy dissipation plates. The assembly type steel structure beam-column joint mainly comprises an H-shaped steel column, an H-shaped steel beam, a plurality of sets of arc-shaped energy dissipation plates and a plurality of connecting pieces. According to the technical scheme, the H-shaped steel column is connected with the upper flange and the lower flange of the H-shaped steel beam through the T-shaped piece and the energy consumption device composed of the multiple sets of arc-shaped energy consumption plates so as to bear the bending moment effect; the H-shaped steel column is connected with a web of the H-shaped steel beam through a T-shaped piece so as to bear vertical shearing force. Under the action of an earthquake, the beam component can rotate around the end part of the upper flange, so that the damage to a floor slab is effectively reduced; and the post-earthquake damage of the joint is concentrated on the arc-shaped energy consumption plate which is easy to detect and replace, and the main body beam column component is not damaged, so that the post-earthquake recovery capability of the joint is greatly improved. In addition, the geometric configuration of the arc-shaped energy consumption plate can be flexibly adjusted, so that the mechanical parameters of the joint have high adjustability.

Description

Technical Field

[0001] The invention relates to the field of energy dissipation and shock absorption in civil engineering, and in particular to an assembled steel structure beam-column node with a replaceable arc-shaped energy dissipation plate. Background Art

[0002] Steel frame structures have excellent earthquake resistance and are widely used in modern buildings. The beam-column components in traditional steel frame structures are usually connected by welding, bolt-welding hybrid connection or full bolt connection. The above connection methods make the steel frame structure first dissipate earthquake energy by forming plastic hinges at the beam ends, which will cause obvious plastic damage and residual deformation of the frame beam itself, bringing difficulties to the post-earthquake repair work of the structure.

[0003] In order to improve the seismic performance and post-earthquake recoverability of steel frame beam-column nodes, researchers proposed prefabricated steel structure beam-column nodes with replaceable energy-absorbing components. By separating the load-bearing and energy-absorbing functions of beam-column nodes, the damage at the post-earthquake node can be concentrated on the replaceable energy-absorbing components, while the main beam-column components remain intact, thereby greatly improving the post-earthquake recoverability of the beam-column node. However, the existing prefabricated steel structure beam-column nodes with replaceable energy-absorbing components still have some shortcomings. For example, the replaceable energy-absorbing components are usually arranged symmetrically at the upper and lower flanges of the beam. The "opening-closing" mechanism at the beam-column interface under earthquake action will cause serious damage to the floor slab, and the presence of the floor slab will also have a significant impact on the mechanical properties of the node. The commonly used replaceable energy-absorbing components in beam-column nodes are buckling-constrained steel plates or steel bars. Such energy-absorbing components require additional lateral restraint components to ensure stable hysteresis performance, which also makes it impossible to directly detect the post-earthquake damage of the energy-absorbing components. In addition, due to the limitations of the geometric configuration of replaceable energy-absorbing components, the mechanical performance parameters of existing beam-column nodes cannot usually be flexibly adjusted, making it difficult for the structure to meet different design objectives. Summary of the invention

[0004] Based on the problems existing in the existing assembled steel structure beam-column nodes with replaceable energy-absorbing components, the present invention proposes an assembled steel structure beam-column node with replaceable arc-shaped energy-absorbing plates.

[0005] The present invention is achieved through the following technical solutions:

[0006] A prefabricated steel structure beam-column node with a replaceable arc-shaped energy dissipation plate, comprising an H-shaped steel column (1), an H-shaped steel beam (2), a arc-shaped energy dissipation plate (3), a first T-shaped member (4), a second T-shaped member (5), a third T-shaped member (6) and a fourth T-shaped member (7);

[0007] A plurality of groups of the arc-shaped energy-absorbing plates (3) are connected to form an integral energy-absorbing device through first T-shaped pieces (4) arranged at both ends of the arc-shaped energy-absorbing plates (3); the H-shaped steel column (1) is connected to the upper flange of the H-shaped steel beam (2) through a second T-shaped piece (5), and the H-shaped steel column (1) is connected to the web of the H-shaped steel beam (2) through a third T-shaped piece (6); the lower flange of the H-shaped steel beam (2) is welded to a fourth T-shaped piece (7) to form a whole, and the H-shaped steel column (1) is connected to the lower flange of the H-shaped steel beam (2) through the first T-shaped pieces (4) at both ends of the arc-shaped energy-absorbing plates (3).

[0008] In a preferred embodiment: the H-shaped steel column (1) is welded with horizontal stiffening plates at the height of the upper and lower flanges of the steel beam (2), and the right flange of the H-shaped steel column (1) is provided with a first circular bolt hole in the vicinity of the stiffening plate.

[0009] In a preferred embodiment: a second circular bolt hole is opened at the left end of the upper flange of the H-shaped steel beam (2), and an oblong hole is opened at the left end of the web.

[0010] In a preferred embodiment, the H-shaped steel column (1) and the H-shaped steel beam (2) are made of ordinary strength steel or high strength steel.

[0011] In a preferred embodiment, there is a certain gap between the H-shaped steel column (1) and the H-shaped steel beam (2).

[0012] In a preferred embodiment: circular holes are opened at both ends of the arc-shaped energy-absorbing plate (3), and the arc-shaped energy-absorbing plates (3) in the same plane are arranged in an O shape, and the plane where the arc-shaped energy-absorbing plate (3) is located is parallel to the plane where the flange of the H-shaped steel beam (2) is located.

[0013] In a preferred embodiment: the first T-shaped member (4), the second T-shaped member (5), the third T-shaped member (6) and the fourth T-shaped member (7) are all provided with a third circular bolt hole.

[0014] In a preferred embodiment: the connecting bolts of the flange of the first T-shaped member (4) apply a pre-tightening force, while the connecting bolts of the web do not apply a pre-tightening force; the connecting bolts of the flange and the web of the second T-shaped member (5) both apply a pre-tightening force; the connecting bolts of the flange of the third T-shaped member (6) apply a pre-tightening force, while the connecting bolts of the web do not apply a pre-tightening force; the connecting bolts of the flange of the fourth T-shaped member (7) apply a pre-tightening force.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention provides an assembled steel structure beam-column node with a replaceable arc-shaped energy-absorbing plate. The assembled parts at the construction site are all connected by bolts, thereby avoiding the adverse effects of welding.

[0017] The present invention provides an assembled steel structure beam-column node with a replaceable arc-shaped energy-absorbing plate. After an earthquake, the damage to the beam-column node is concentrated on the replaceable arc-shaped energy-absorbing plate, while the main beam-column components always maintain elasticity, so the post-earthquake repair cost of the node is greatly reduced. The normal use function of the node can be quickly restored by dismantling the bolts and replacing the damaged arc-shaped energy-absorbing plate.

[0018] The present invention provides an assembled steel structure beam-column node with a replaceable arc-shaped energy-absorbing plate, which has stable hysteresis performance without the need for additional lateral restraint devices, and its hysteresis characteristics can be flexibly adjusted by changing its geometric configuration. However, the geometric configuration of existing buckling restraint energy-absorbing components is usually fixed, so the hysteresis characteristics cannot be flexibly adjusted.

[0019] The present invention provides an assembled steel structure beam-column node with a replaceable arc-shaped energy-absorbing plate. Since the arc-shaped energy-absorbing plate does not require an additional lateral restraint device, post-earthquake damage detection is very convenient.

[0020] The present invention provides an assembled steel structure beam-column node with a replaceable arc-shaped energy-absorbing plate. Under the action of an earthquake, the H-shaped steel beam in the beam-column node rotates around the upper flange end of the steel beam, which can effectively reduce the damage to the floor slab. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall schematic diagram of the present invention;

[0022] Figure 2 It is a disassembly schematic diagram of the present invention;

[0023] Figure 3 It is an elevation view of the present invention;

[0024] Figure 4 It is a right side view of the present invention;

[0025] Figure 5 A top view of the overall energy dissipation device of the present invention;

[0026] Figure 6 It is a side view of the overall energy dissipation device of the present invention;

[0027] Among them, there are H-shaped steel columns 1, H-shaped steel beams 2, arc-shaped energy absorption plates 3, first T-shaped pieces 4, second T-shaped pieces 5, third T-shaped pieces 6, and fourth T-shaped pieces 7. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below through the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "left", "right", "upper", "lower" and the like indicate directions or positional relationships based on the attached Figure 1 and attached Figure 2 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] like Figure 1-Figure 6 As shown, this embodiment provides an assembled steel structure beam-column node with a replaceable arc-shaped energy absorption plate, including an H-shaped steel column 1, an H-shaped steel beam 2, a arc-shaped energy absorption plate 3, a first T-shaped member 4, a second T-shaped member 5, a third T-shaped member 6 and a fourth T-shaped member 7.

[0031] The H-shaped steel column 1 and the H-shaped steel beam 2 can be made of ordinary strength steel, such as Q355 steel, or high strength steel, such as Q460 and Q690 steel.

[0032] The H-shaped steel column 1 is welded with horizontal stiffening plates at the height of the upper and lower flanges of the H-shaped steel beam 2. A first circular bolt hole is opened in the right flange of the H-shaped steel column 1 near the stiffening plate, and the hole diameter is 1 to 2 mm larger than the diameter of the connecting bolt.

[0033] A second circular bolt hole is opened at the left end of the upper flange of the H-shaped steel beam 2, and the hole diameter is 1 to 2 mm larger than the diameter of the connecting bolt; an oblong hole is opened at the left end of the web, and the hole diameter should be as close as possible to the bolt diameter, and the hole length is determined according to the rotation displacement requirements of the H-shaped steel beam 2.

[0034] There is a certain gap between the H-shaped steel column 1 and the H-shaped steel beam 2, and this gap should ensure that the lower flange of the H-shaped steel beam 2 will not contact the flange of the H-shaped steel column 1 during the rotation of the H-shaped steel beam 2 around the left end of the upper flange.

[0035] The arc-shaped energy-absorbing plate 3 is made of steel with a low yield point, such as Q235, LY100 or LY225 steel, and has circular holes at both ends. The diameter of the circular holes should be as close as possible to the diameter of the connecting bolts. The two arc-shaped energy-absorbing plates 3 in the same plane are arranged in an O shape, and the plane where the two arc-shaped energy-absorbing plates 3 are located is parallel to the plane where the flange of the H-shaped steel beam 2 is located. The two arc-shaped energy-absorbing plates 3 in the same plane form an energy-absorbing plate group. The number of energy-absorbing plate groups shown in this embodiment is two, and the actual number of energy-absorbing plate groups can be determined according to design requirements.

[0036] The first T-shaped member 4, the second T-shaped member 5, the third T-shaped member 6 and the fourth T-shaped member 7 are welded from two steel plates and are all provided with a third circular bolt hole. The bolt hole diameter of the flange of the first T-shaped member 4 is 1 to 2 mm larger than the diameter of the connecting bolt, and the bolt hole diameter of the web should be as close to the connecting bolt diameter as possible; the bolt hole diameters of the flange and web of the second T-shaped member 5 are 1 to 2 mm larger than the corresponding connecting bolt diameter; the bolt hole diameter of the flange of the third T-shaped member 6 is 1 to 2 mm larger than the connecting bolt diameter, and the bolt hole diameter of the web should be as close to the connecting bolt diameter as possible; the bolt hole diameter of the flange of the fourth T-shaped member 7 is 1 to 2 mm larger than the connecting bolt diameter.

[0037] The first T-shaped member 4 has a preload applied to the connecting bolts on the flange, but no preload is applied to the connecting bolts on the web; the second T-shaped member 5 has a preload applied to the connecting bolts on both the flange and the web; the third T-shaped member 6 has a preload applied to the connecting bolts on the flange, but no preload is applied to the connecting bolts on the web; the fourth T-shaped member 7 has a preload applied to the connecting bolts on the flange. The preload value applied to the connecting bolts is determined according to the current specifications.

[0038] The assembly process of the assembled steel structure beam-column node with replaceable arc-shaped energy dissipation plate proposed in this embodiment is as follows:

[0039] Step 1: Weld the H-shaped steel beam 2 and the fourth T-shaped member 7 into a whole;

[0040] Step 2: Connect the multiple groups of arc-shaped energy-absorbing plates 3 and the first T-shaped pieces 4 at both ends into a whole by bolts;

[0041] Step 3: Connect the H-shaped steel column 1, the upper flange of the H-shaped steel beam 2 and the second T-shaped member 5 by bolts;

[0042] Step 4: Connect the H-shaped steel column 1, the web of the H-shaped steel beam 2 and the third T-shaped member 6 by bolts;

[0043] Step 5: Connect the fourth T-shaped piece 7 welded at the lower flange of the H-shaped steel column 1 and the H-shaped steel beam 2 and the first T-shaped pieces 4 at both ends of the arc-shaped energy absorption plate 3 by bolts.

[0044] So far, the assembly work of the present invention is completed.

[0045] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. An assembled steel structure beam-column node with replaceable arc-shaped energy-absorbing plates, Features: It comprises an H-shaped steel column (1), an H-shaped steel beam (2), an arc-shaped energy-absorbing plate (3), a first T-shaped member (4), a second T-shaped member (5), a third T-shaped member (6) and a fourth T-shaped member (7); A plurality of groups of the arc-shaped energy-absorbing plates (3) are connected to form an integral energy-absorbing device through first T-shaped pieces (4) arranged at both ends of the arc-shaped energy-absorbing plates (3); the H-shaped steel column (1) is connected to the upper flange of the H-shaped steel beam (2) through a second T-shaped piece (5), and the H-shaped steel column (1) is connected to the web of the H-shaped steel beam (2) through a third T-shaped piece (6); the lower flange of the H-shaped steel beam (2) is welded to a fourth T-shaped piece (7) to form a whole, and the H-shaped steel column (1) is connected to the lower flange of the H-shaped steel beam (2) through the first T-shaped pieces (4) at both ends of the arc-shaped energy-absorbing plates (3).

2. According to claim 1, a prefabricated steel structure beam-column node with replaceable arc-shaped energy-absorbing plates, Features: The H-shaped steel column (1) is welded with horizontal stiffening plates at the height of the upper and lower flanges of the steel beam (2), and the right flange of the H-shaped steel column (1) is provided with a first circular bolt hole in the vicinity of the stiffening plate.

3. According to claim 1, a prefabricated steel structure beam-column node with replaceable arc-shaped energy-absorbing plates, Features: A second circular bolt hole is provided at the left end of the upper flange of the H-shaped steel beam (2), and an oblong hole is provided at the left end of the web.

4. The assembled steel structure beam-column node with replaceable arc-shaped energy-absorbing plate according to claim 1, Features: The H-shaped steel column (1) and the H-shaped steel beam (2) are made of ordinary strength steel or high strength steel.

5. The assembled steel structure beam-column node with replaceable arc-shaped energy-absorbing plate according to claim 1, Features: There is a certain gap between the H-shaped steel column (1) and the H-shaped steel beam (2).

6. The assembled steel structure beam-column node with replaceable arc-shaped energy-absorbing plate according to claim 1, Features: Circular holes are opened at both ends of the arc-shaped energy-absorbing plate (3), and the arc-shaped energy-absorbing plates (3) in the same plane are arranged in an O shape, and the plane where the arc-shaped energy-absorbing plate (3) is located is parallel to the plane where the flange of the H-shaped steel beam (2) is located.

7. The assembled steel structure beam-column node with replaceable arc-shaped energy-absorbing plate according to claim 1, Features: The first T-shaped piece (4), the second T-shaped piece (5), the third T-shaped piece (6) and the fourth T-shaped piece (7) are all provided with a third circular bolt hole.

8. The assembled steel structure beam-column node with replaceable arc-shaped energy-absorbing plate according to claim 1, Features: The connecting bolts of the flange of the first T-shaped member (4) apply a pre-tightening force, while the connecting bolts of the web do not apply a pre-tightening force; the connecting bolts of the flange and the web of the second T-shaped member (5) both apply a pre-tightening force; the connecting bolts of the flange of the third T-shaped member (6) apply a pre-tightening force, while the connecting bolts of the web do not apply a pre-tightening force; the connecting bolts of the flange of the fourth T-shaped member (7) apply a pre-tightening force.

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