An assembled beam-column joint with damper and construction method

Abstract

The application relates to the technical field of beam-column joint, and provides an assembled beam-column joint with a damper and a construction method, which comprises a steel column, a sleeve, a steel beam and a damping device; the sleeve is sleeved outside the steel column; one end of the steel beam is fixedly connected with the steel column; the damping device comprises a sector-shaped damper and a high-performance spring; the sector-shaped damper comprises a viscoelastic material plate arranged along the arc length direction of the sector-shaped damper; one end of the sector-shaped damper along the arc length direction is connected with the high-performance spring, and the other end is connected with the sleeve; one end of the high-performance spring, which is opposite to the sector-shaped damper, is connected with the steel beam. The high-performance spring is combined with the viscoelastic material plate, energy consumption is cooperatively carried out by multiple energy consumption components, when bending deformation occurs at the joint, the beam-column joint can store and consume energy, the joint can be better protected, and the structure can be better protected. The on-site welding workload can be greatly reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of beam-column joint technology, specifically relating to a prefabricated beam-column joint with a damper and its construction method. Background Technology

[0002] Some prefabricated frame structures have suffered severe damage after earthquakes, primarily due to breaches in connections between components and at the joints of prefabricated parts, leading to overall structural disintegration and collapse. Their seismic performance is weaker than that of cast-in-place joints, making it difficult to meet the design principle of "strong joints, weak components." Dampers, also known as damping devices, are devices designed to rapidly attenuate vibrations caused by impacts. Viscoelastic materials, as high-molecular polymers, are high-performance energy-dissipating materials. Existing technologies disclose various beam-column joints with metal dampers or viscoelastic material dampers, but their energy dissipation effects are not ideal, and installation is inconvenient, hindering construction efficiency. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a prefabricated beam-column joint with damper and a construction method, which has the characteristics of convenient processing, beautiful joint shape, convenient on-site installation, high precision and easy construction.

[0004] In a first aspect, the present invention proposes an assembled beam-column joint with a damper, comprising: a steel column, a sleeve, a steel beam, and a damping device; the sleeve is fitted onto the outside of the steel column; one end of the steel beam is fixedly connected to the steel column; the damping device comprises a sector-shaped damper and a high-performance spring; the sector-shaped damper comprises a viscoelastic material plate arranged along its arc length direction; one end of the sector-shaped damper along its arc length direction is connected to the high-performance spring, and the other end is connected to the sleeve; the end of the high-performance spring facing away from the sector-shaped damper is connected to the steel beam.

[0005] Furthermore, the damping device includes a column end connecting plate, a spring connecting plate, and a beam end connecting plate arranged sequentially at intervals along the arc length direction of the sector-shaped damper; the sector-shaped damper is connected between the column end connecting plate and the spring connecting plate, and the high-performance spring is connected between the spring connecting plate and the beam end connecting plate; the column end connecting plate is connected to the sleeve, and the beam end connecting plate is connected to the steel beam.

[0006] Furthermore, the sector-shaped damper includes a middle steel plate and an outer steel plate; the viscoelastic material plate is connected between the middle steel plate and the outer steel plate; one end of the middle steel plate is connected to the column end connecting plate, and the other end is kept at a distance from the spring connecting plate; one end of the outer steel plate is connected to the spring connecting plate, and the other end is kept at a distance from the column end connecting plate.

[0007] Furthermore, the sector damper also includes an angle steel; one end of the angle steel is connected to the intermediate steel plate, and the other end is connected to the column end connecting plate.

[0008] Furthermore, a viscoelastic material plate is provided on each side of the intermediate steel plate, one end of the viscoelastic material plate is connected to the angle steel, and the other end is kept at a distance from the spring connecting plate.

[0009] Furthermore, the sector-shaped damper also includes an upper tie plate and a lower tie plate that clamp and fix the two outer steel plates in opposite directions; the upper tie plate is disposed at the upper end of the sector-shaped damper, and the lower tie plate is disposed at the lower end of the sector-shaped damper.

[0010] Furthermore, a metal adhesive is provided between the intermediate steel plate and the viscoelastic material plate, and between the outer steel plate and the viscoelastic material plate.

[0011] Furthermore, the outer steel plate has pre-drilled holes for bolts to pass through, and the outer steel plate is connected to the viscoelastic material plate by bolts, wherein the bolts are embedded in but do not penetrate the viscoelastic material plate.

[0012] Furthermore, the steel beam is a variable cross-section beam; the steel beam includes a large cross-section H-beam, stiffening ribs, and a small cross-section H-beam; one end of the large cross-section H-beam is fixedly connected to the steel column, and the other end is connected to the small cross-section H-beam; the stiffening ribs are arranged on both sides of the large cross-section H-beam; the beam end connecting plate is connected to the beam flange plate of the large cross-section H-beam.

[0013] Furthermore, there are multiple fan-shaped dampers and multiple high-performance springs, and the multiple fan-shaped dampers and multiple high-performance springs are respectively arranged at intervals along the length direction of the spring connecting plate.

[0014] Secondly, the present invention provides a construction method for the above-mentioned prefabricated beam-column joint with damper, comprising the following steps:

[0015] After inserting the steel column into the sleeve, connect and fix it; fix one end of the steel beam to one side of the steel column below the sleeve; assemble multiple sector-shaped dampers and multiple high-performance springs of the damping device, wherein the multiple high-performance springs are distributed along the width direction of the beam flange of the steel beam, and the multiple sector-shaped dampers are distributed along the width direction of the sleeve; connect the end of the sector-shaped damper opposite to the high-performance spring to the sleeve, and connect the end of the high-performance spring opposite to the sector-shaped damper to the beam flange of the steel beam.

[0016] The beneficial effects of this invention are as follows: Viscoelastic materials possess both viscosity and elasticity. Under seismic loads, when significant deformation occurs at the core of a joint, a portion of energy can be stored for buffering. The high-performance spring dissipates this stored energy, reducing the possibility of tearing of the viscoelastic material. By combining the high-performance spring with a viscoelastic material plate, multiple energy-dissipating components work together to absorb energy. When bending deformation occurs at the joint, the beam-column joint as a whole can both store and dissipate energy, better protecting the joint and preventing or minimizing damage. It absorbs energy while simultaneously enhancing energy dissipation capabilities, thus better protecting the structure. Furthermore, all components of this invention can be mass-produced in a factory and transported to the construction site for installation and assembly, significantly reducing on-site welding work and improving construction efficiency. All components of this invention can be effectively and quickly replaced after damage under stress, reducing costs. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the prefabricated beam-column joint with damper of the present invention;

[0018] Figure 2 for Figure 1 An explosion diagram;

[0019] Figure 3 This is a three-dimensional structural diagram of the damping device of the present invention;

[0020] Figure 4 This is an exploded schematic diagram of the damping device of the present invention;

[0021] Figure 5 This is an exploded view of a sector-shaped damper in the damping device of the present invention;

[0022] Figure 6 This is a three-dimensional structural diagram of the steel beam of the present invention, which is a variable cross-section beam.

[0023] In the diagram: 1-Steel column; 2-Sleeve; 3-Damping device; 31-Fan-shaped damper; 311-Outer steel plate; 312-Viscoelastic material plate; 313-Intermediate steel plate; 314-Angle steel; 315-Upper tie plate; 316-Lower tie plate; 32-Column end connecting plate; 33-Spring connecting plate; 34-High-performance spring; 35-Beam end connecting plate; 36-Bolt; 4-Steel beam; 41-Large cross-section H-beam; 42-Stiffening rib; 43-Small cross-section H-beam. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1-5The prefabricated beam-column joint with damper shown includes: a steel column 1, a sleeve 2, a steel beam 4, and a damping device 3. In this embodiment, the steel column 1 is a square steel column 1, and the sleeve 2 is a corresponding square sleeve 2. The steel beam 4 is a variable cross-section beam. The sleeve 2 is fitted onto the outside of the steel column 1 and is fixed by bolts 36.

[0026] Combined with appendix Figure 1 , Figure 6 As shown, the variable cross-section beam includes a large-section H-beam 41, stiffening ribs 42, and a small-section H-beam 43. One end of the large-section H-beam 41 is welded and fixed to one side of the steel column 1, with the welded joint located below the sleeve 2 of the steel column 1. The other end of the large-section H-beam 41 is connected to the small-section H-beam 43. The location of the variable cross-section is designed according to the seismic design code. Using the large-section H-beam 41 can improve the seismic performance at the core of the joint, while using the small-section H-beam 43 can reduce the self-weight. Stiffening ribs 42 are provided on both sides of the large-section H-beam 41.

[0027] like Figure 1 , Figure 2 As shown, a steel beam 4 is provided in each of the four directions of the steel column 1, and a damping device 3 is provided at the connection node between each steel beam 4 and the steel column 1.

[0028] like Figure 3 , Figure 4 As shown, each damping device 3 includes a sector-shaped damper 31, a high-performance spring 34, and column-end connecting plates 32, spring connecting plates 33, and beam-end connecting plates 35 arranged sequentially and at intervals along the arc length of the sector-shaped damper 31. The sector-shaped damper 31 is connected between the column-end connecting plate 32 and the spring connecting plate 33, and the high-performance spring 34 is connected between the spring connecting plate 33 and the beam-end connecting plate 35. The column-end connecting plate 32 is connected to the sleeve 2 by bolts 36, and the beam-end connecting plate 35 is connected to the beam flange plate of the large-section H-shaped steel beam 41 by bolts 36, thereby realizing the installation of each damping device 3 at the connection node between the steel beam 4 and the steel column 1.

[0029] The sector damper 31 includes an outer steel plate 311, a viscoelastic material plate 312, a middle steel plate 313, an angle steel 314, an upper tie steel plate 315, and a lower tie steel plate 316.

[0030] The viscoelastic material plate 312 is a sector-shaped plate made of viscoelastic material, and the arc length direction of the sector-shaped plate is the arc length direction of the sector-shaped damper 31 described in this embodiment.

[0031] In this embodiment, each sector damper 31 includes two outer steel plates 311 and two viscoelastic material plates 312.

[0032] Both the intermediate steel plate 313 and the outer steel plate 311 are fan-shaped plates made of steel. Angle steel 314 is connected to the upper end of the intermediate steel plate 313, and the connection can be made by welding or bolts 36. The angle steel 314 is connected to the column end connecting plate 32. The column end connecting plate 32 has multiple through holes spaced along its length, and the angle steel 314 also has corresponding through holes. According to installation requirements, after aligning the through holes on the angle steel 314 with the through holes on the column end connecting plate 32, the angle steel 314 is connected and fixed to the column end connecting plate 32 using bolts 36. Because there are multiple through holes on the column end connecting plate 32, the installation position of the angle steel 314 on the column end connecting plate 32 can be flexibly adjusted, making installation flexible and convenient. The angle steel 314 is fixed to the intermediate steel plate 313, and viscoelastic material plates 312 are respectively provided on both sides of the intermediate steel plate 313. Therefore, the flexible installation of the angle steel 314 on the column end connecting plate 32 realizes the flexible installation of the viscoelastic material plates 312.

[0033] A viscoelastic material plate 312 is provided on each side of the intermediate steel plate 313, connecting the intermediate steel plate 313 and the outer steel plate 311. One end of the intermediate steel plate 313 is connected to the angle steel 314, and the other end is spaced from the spring connecting plate 33. One end of the outer steel plate 311 is connected to the spring connecting plate 33, and the other end is spaced from the column end connecting plate 32. One end of the viscoelastic material plate 312 is connected to the angle steel 314 by bolts 36, and the other end is spaced from the spring connecting plate 33. Thus, when large deformation occurs at the node core, the force can be fully transferred to the viscoelastic material plate 312, improving the energy storage effect of the viscoelastic material plate 312; the viscoelastic material plate 312 can store a portion of the energy for buffering.

[0034] like Figures 3-5 As shown, the upper connecting steel plate 315 is disposed at the upper end of the sector-shaped damper 31, and the lower connecting steel plate 316 is disposed at the lower end of the sector-shaped damper 31. The upper connecting steel plate 315 and the lower connecting steel plate 316 have the same structure and function, both being used to clamp and fix the two outer steel plates 311 in opposite directions. Structurally, the upper connecting steel plate 315 and the lower connecting steel plate 316 respectively include a U-shaped clamping rod and a locking element, which can be a screw. The clamping rod includes a rod body and clamping blocks disposed at both ends of the rod body; the rod body is located at the outer fan-shaped edge of the two outer steel plates 311, and the two clamping blocks are respectively disposed on opposite sides of the two outer steel plates 311. Each clamping block is provided with a locking element. Tightening the locking element can clamp the two clamping blocks to the opposite sides of the two outer steel plates 311, thereby clamping and fixing the outer steel plate 311, the viscoelastic material plate 312 and the middle steel plate 313, while restricting the slippage of the outer steel plate 311, the viscoelastic material plate 312 and the middle steel plate 313.

[0035] In addition, metal adhesives are respectively provided between the middle steel plate 313 and the viscoelastic material plate 312, and between the outer steel plate 311 and the viscoelastic material plate 312.

[0036] The outer steel plate 311 has pre-drilled holes for bolts 36 to pass through. The outer steel plate 311 is connected to the viscoelastic material plate 312 by bolts 36. The bolts 36 are embedded in but do not penetrate the viscoelastic material plate 312.

[0037] Multiple sector-shaped dampers 31 and high-performance springs 34 are provided, spaced apart along the length of the spring connecting plate 33. Similarly, multiple through holes are provided along the length of the spring connecting plate 33. The high-performance springs 34 are connected to the spring connecting plate 33 by bolts 36 passing through the through holes. The installation position and number of high-performance springs 34 on the spring connecting plate 33 can be selected according to requirements. In this embodiment, six high-performance springs 34 are installed at the lower end of the spring connecting plate 33. The six high-performance springs 34 are arranged side-by-side in the horizontal and vertical directions of the axis of the steel beam 4, which can effectively dissipate the energy input to the structure by earthquakes. Two sector-shaped dampers 31 are connected to the upper end of the spring connecting plate 33.

[0038] When bending deformation occurs at the node, multiple energy-dissipating components such as the high-performance spring 34 and the viscoelastic material plate 312 work together to dissipate energy, which can better protect the node, prevent the node from being damaged or only slightly damaged, absorb energy, exert better energy dissipation capabilities, and better protect the structure.

[0039] Based on the same inventive concept, this invention also proposes a construction method for the above-mentioned prefabricated beam-column joint with damper, comprising the following steps:

[0040] After inserting the steel column 1 into the sleeve 2, the steel column 1 and the sleeve 2 are connected and fixed using bolts 36. The sleeve 2 is fixed at the designed height, which is higher than the target height of the steel beam 4, so that the damping device 3 is located above the steel beam 4. One end of the steel beam 4 is welded and fixed to the side of the steel column 1 below the sleeve 2. Multiple sector-shaped dampers 31 and multiple high-performance springs 34 of the damping device 3 are prefabricated and assembled in advance. The multiple high-performance springs 34 are distributed along the width direction of the beam flange plate of the steel beam 4, and the multiple sector-shaped dampers 31 are distributed along the width direction of the sleeve 2. The end of the sector-shaped damper 31 facing away from the high-performance spring 34 is connected to the sleeve 2 by bolts 36, and the end of the high-performance spring 34 facing away from the sector-shaped damper 31 is connected to the beam flange plate of the steel beam 4 by bolts 36. This completes the construction of a beam-column joint between the steel beam 4 and the steel column 1. Next, weld and fix another steel beam 4 to the other side of the steel column 1, and install another damping device 3 on the upper end of the next steel beam 4. At the same time, connect the other damping device 3 to the steel column 1 to complete the construction of the beam-column joint between the next steel beam 4 and the steel column 1. Repeat the above steps until all beam-column joints between the steel column 1 and the steel beam 4 above it are completed.

[0041] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A prefabricated beam-column joint with a damper, characterized in that, include: Steel columns, sleeves, steel beams, and damping devices; The sleeve is fitted onto the outside of the steel column; One end of the steel beam is fixedly connected to the steel column; the damping device includes a sector-shaped damper and a high-performance spring; the sector-shaped damper includes a viscoelastic material plate arranged along its arc length direction; one end of the sector-shaped damper along its arc length direction is connected to the high-performance spring, and the other end is connected to the sleeve; the end of the high-performance spring facing away from the sector-shaped damper is connected to the steel beam; the damping device includes a column end connecting plate, a spring connecting plate, and a beam end connecting plate arranged sequentially at intervals along the arc length direction of the sector-shaped damper; the sector-shaped damper is connected between the column end connecting plate and the spring connecting plate, and the high-performance spring is connected between the spring connecting plate and the beam end connecting plate; the column end connecting plate is connected to the sleeve, and the beam end connecting plate is connected to the steel beam; the sector-shaped damper includes a middle steel plate and an outer steel plate; A viscoelastic material plate is connected between the intermediate steel plate and the outer steel plate; one end of the intermediate steel plate is connected to the column end connecting plate, and the other end is spaced from the spring connecting plate; one end of the outer steel plate is connected to the spring connecting plate, and the other end is spaced from the column end connecting plate; the sector-shaped damper also includes an angle steel; one end of the angle steel is connected to the intermediate steel plate, and the other end is connected to the column end connecting plate; a viscoelastic material plate is respectively provided on both sides of the intermediate steel plate, one end of the viscoelastic material plate is connected to the angle steel, and the other end is spaced from the spring connecting plate; the sector-shaped damper also includes an upper end connecting steel plate and a lower end connecting steel plate that clamp and fix the two outer steel plates in opposite directions; the upper end connecting steel plate is provided at the upper end of the sector-shaped damper, and the lower end connecting steel plate is provided at the lower end of the sector-shaped damper.

2. The prefabricated beam-column joint with damper according to claim 1, characterized in that, Metal adhesives are respectively provided between the intermediate steel plate and the viscoelastic material plate, and between the outer steel plate and the viscoelastic material plate.

3. The prefabricated beam-column joint with damper according to claim 1, characterized in that, The outer steel plate has pre-drilled holes for bolts to pass through. The outer steel plate is connected to the viscoelastic material plate by bolts, which are embedded in but do not penetrate the viscoelastic material plate.

4. The prefabricated beam-column joint with damper according to claim 1, characterized in that, The steel beam is a variable cross-section beam; the steel beam includes a large cross-section H-beam, stiffening ribs, and a small cross-section H-beam; one end of the large cross-section H-beam is fixedly connected to the steel column, and the other end is connected to the small cross-section H-beam; the stiffening ribs are arranged on both sides of the large cross-section H-beam; the beam end connecting plate is connected to the beam flange plate of the large cross-section H-beam.

5. A construction method for a prefabricated beam-column joint with a damper as described in claim 1, characterized in that, Includes the following steps: After inserting the steel column into the sleeve, connect and fix it; One end of the steel beam is fixed to one side of the steel column below the sleeve; Assemble multiple sector-shaped dampers and multiple high-performance springs of the damping device, wherein the multiple high-performance springs are distributed along the width direction of the beam flange plate of the steel beam, and the multiple sector-shaped dampers are distributed along the width direction of the sleeve. Connect the end of the sector damper facing away from the high-performance spring to the sleeve, and connect the end of the high-performance spring facing away from the sector damper to the flange plate of the steel beam.

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