Recoverable steel frame joint with damping, friction and energy dissipation functions

Abstract

The recoverable steel frame node comprises a stand column, the side wall of the stand column is connected with one end of an end beam, the side wall of the stand column is located on the upper side and the lower side of the end beam and connected with one ends of energy consumption plates through longitudinal bars and locking nuts, and a rectangular connecting assembly is connected between the energy consumption plates on the upper side and the lower side. The middle of the rectangular connecting assembly is connected with a pin shaft, the pin shaft penetrates through the other end of the end beam, the pin shaft is further connected with a middle beam in a penetrating mode, and a supporting energy dissipation structure is further connected between the middle beam and the rectangular connecting assembly. The end beams and the middle beams are connected through the pin shafts, then the energy dissipation plates are connected through the high-strength short bolts, the energy dissipation connecting pieces are connected through the high-strength long bolts, and if the middle beams have certain vibration in the transverse horizontal or vertical direction, the connecting pieces drive the energy dissipation plates and the energy dissipation connecting pieces to generate displacement friction to reduce the influence of vibration.

Description

Technical Field

[0001] The utility model belongs to the technical field of seismic beam-column connection node structures, and particularly relates to a recoverable steel frame node with the function of shock absorption, friction energy dissipation. Background Technique

[0002] The beam-column joint plays a crucial role in the design of frame structures, which is directly related to the safety and reliability indexes of the whole structure. Under the action of earthquake, the stress condition of the beam-column joint is relatively complex, and it is the seismic weak link of the structure. Brittle fracture is likely to occur at the connecting parts, which is likely to cause huge economic losses and even casualties. Content of the Utility Model

[0003] The purpose of the utility model is to provide a recoverable steel frame node with the function of shock absorption, friction energy dissipation, which solves the problem that the connection strength between the column and the steel beam of the existing beam-column connection node is weak, resulting in poor seismic effect.

[0004] The technical solution adopted by the utility model is that the recoverable steel frame node with the function of shock absorption, friction energy dissipation includes a column. One end of an end beam is connected to the side wall of the column. One ends of energy dissipation plates are respectively connected to the upper and lower sides of the end beam on the side wall of the column through longitudinal bars and locking nuts. A rectangular connection component is connected between the upper and lower energy dissipation plates. A pin shaft is connected to the middle of the rectangular connection component. The pin shaft passes through the other end of the end beam, and an intermediate beam is also sleeved on the pin shaft. A support energy dissipation structure is also connected between the intermediate beam and the rectangular connection component.

[0005] The characteristics of the utility model also lie in that:

[0006] The rectangular connection component includes a U-shaped upper connecting piece and a U-shaped lower connecting piece. The upper connecting piece is connected to the energy dissipation plate at the upper end of the end beam, and the lower connecting piece is connected to the energy dissipation plate at the lower end of the end beam. The upper connecting piece and the lower connecting piece are connected by a pin shaft to form a rectangular frame. Support energy dissipation structures are respectively connected between the upper connecting piece and the intermediate beam and between the lower connecting piece and the intermediate beam.

[0007] One ends of SMA rods are also connected to the upper and lower sides of the end beam on the column through a rotating component respectively, and the other end of each SMA rod is connected to the outer wall of the rectangular connection component through another rotating component.

[0008] The rotating component includes a high-strength short bolt and a base. The outer wall of the column or the rectangular connection component is respectively connected to the base through the high-strength short bolt, and a nut connected to the high-strength short bolt is also included.

[0009] The support energy dissipation structure includes two energy dissipation connecting pieces, which are respectively connected between the upper and lower sides of the intermediate beam and the rectangular connection component.

[0010] The energy-consuming connector includes two steel plates. On one side of each steel plate, a plurality of support plates are welded at equal intervals. An array of through holes is formed in each support plate. The support plates on the two steel plates are connected by high-strength long bolts passing through the array of holes. One of the steel plates is welded to a rectangular connection component, and the other steel plate is welded to the middle beam.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1) The end beam and the middle beam are connected by a pin shaft, and then the energy-consuming plate is connected by high-strength short bolts, and the energy-consuming connector is connected by high-strength long bolts. If there is a certain vibration in the middle beam in the horizontal or vertical direction, the connector drives the energy-consuming plate and the energy-consuming connector to displace and friction to reduce the influence of the vibration. The self-resetting function is realized through the SMA rod. When an earthquake occurs, the SMA rods are respectively in the tensile and compressive states at the same time and consume the earthquake energy. The energy-consuming connector can consume a part of the vibration energy, and can avoid the energy-consuming plate from being prematurely stretched or squeezed and broken to lose the energy-consuming function. That is, while improving the strength of the connection node, the seismic effect of the connection node can be enhanced.

[0013] 2) The energy-consuming plate is a replaceable device, which is convenient for replacement after an earthquake. This structure has clear force and reliable force transmission, and has the characteristics of replaceable segments and quick recovery function after being damaged by strong earthquake action, so that the beam-column joint structure still maintains good energy-consuming capacity under earthquake action. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the first perspective of the recoverable steel frame joint with shock-absorbing friction energy consumption of the present utility model;

[0015] Figure 2 It is a schematic structural diagram of the second perspective of the recoverable steel frame joint with shock-absorbing friction energy consumption of the present utility model;

[0016] Figure 3 It is an exploded schematic diagram of the connection relationship of the columns, end beams, middle beams, upper and lower connectors and pin shafts of the utility model;

[0017] Figure 4 It is a schematic diagram of the connection relationship of the energy-consuming plate, connector, energy-consuming connector and SMA rod of the utility model;

[0018] Figure 5 It is an enlarged schematic diagram of the energy-consuming connector of the present utility model.

[0019] Among them, 1. Column, 2. Middle beam, 3. End beam, 4. Upper connector, 5. Lower connector, 6. Pin shaft, 7. Energy-consuming plate, 8. High-strength short bolt, 9. Nut, 10. Longitudinal reinforcement, 11. Locking nut, 12. Steel plate, 13. High-strength long bolt, 14. Base, 15. SMA rod, 16. Support plate, 17. Array of holes. Detailed implementation manners

[0020] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0021] Embodiment 1

[0022] The present utility model has a shock-absorbing, friction energy-dissipating and recoverable steel frame joint. As Figure 1 shown, it includes a column 1. One end of a crossbeam 3 is connected to the side wall of the column 1. One ends of energy-dissipating plates 7 are respectively connected to the upper and lower sides of the crossbeam 3 on the side wall of the column 1 through longitudinal bars 10 and locking nuts 11. The longitudinal bars 10 and the locking nuts 11 can connect the energy-dissipating plates 7 to the column 1. A rectangular connection assembly is connected between the upper and lower energy-dissipating plates 7. The middle of the rectangular connection assembly is connected to a pin shaft 6. The pin shaft 6 passes through the other end of the crossbeam 3. An intermediate beam 2 is also sleeved on the pin shaft 6. The pin shaft 6 can better transmit force. A support energy-dissipating structure is also connected between the intermediate beam 2 and the rectangular connection assembly. The prefabrication of the column 1, the intermediate beam 2 and the crossbeam 3 is realized in a processing factory. Under a large earthquake action, the energy-dissipating plates 7 drive the support energy-dissipating structure to vibrate, so that the rectangular connection assembly rotates around the pin shaft 6, and then drives the support energy-dissipating structure to vibrate, consuming most of the vibration energy, and avoiding the energy-dissipating plates 7 from being stretched or broken prematurely and losing the energy-dissipating function. Even if the energy-dissipating plates 7 are stretched or broken, the support energy-dissipating structure can still continue to consume earthquake energy.

[0023] Embodiment 2

[0024] On the basis of Embodiment 1, as Figure 3 shown, in this embodiment, the rectangular connection assembly includes a U-shaped upper connection member 4 and a U-shaped lower connection member 5. The upper connection member 4 is connected to the energy-dissipating plate 7 at the upper end of the crossbeam 3, and the lower connection member 5 is connected to the energy-dissipating plate 7 at the lower end of the crossbeam 3. The upper connection member 4 and the lower connection member 5 are connected by the pin shaft 6 to form a rectangular frame. Support energy-dissipating structures are respectively connected between the upper connection member 4 and the intermediate beam 2 and between the lower connection member 5 and the intermediate beam 2. When the energy-dissipating plates 7 vibrate, they drive the upper connection member 4 and the lower connection member 5 to rotate around the pin shaft 6, and then drive the support energy-dissipating structure to vibrate, consuming most of the vibration energy.

[0025] Embodiment 3

[0026] On the basis of Embodiment 1, as Figure 4 shown, in this embodiment, one ends of SMA rods 15 are also connected to the upper and lower sides of the crossbeam 3 on the column 1 through a rotating assembly. The other end of each SMA rod 15 is connected to the outer wall of the rectangular connection assembly through another rotating assembly. The SMA rods 15 can increase the connection relationship between the column and the rectangular connection assembly. Among them, the SMA15 is made of a shape memory alloy material. For the convenience of installation, holes are opened at both ends, and the SMA rods 15 are symmetrically connected by high-strength short bolts to achieve the recoverable function.

[0027] Among them, the rotating assembly includes high-strength short bolts 8 and a base 14. The outer walls of the column 1 or the rectangular connection assembly are respectively connected to the base 14 through high-strength short bolts 8. The base 14 is connected to the end of the SMA rod 15 through a shaft. A nut 9 connected to the high-strength short bolt 8 is also included. When vibration occurs, the SMA rod 15 can rotate relatively around the shaft to achieve the effect of energy dissipation.

[0028] Embodiment 4

[0029] Based on Embodiment 1, as Figure 5 shown, in this embodiment, the support energy dissipation structure includes two energy dissipation connectors, which are respectively connected between the upper and lower surfaces of the middle beam 2 and the rectangular connection assembly.

[0030] Among them, the energy dissipation connector includes two steel plates 12. A plurality of support plates 16 are welded at equal intervals on one side of each steel plate 12. Array holes 17 that communicate with each other are opened on each support plate 16. The support plates 16 on the two steel plates 12 are connected by high-strength long bolts 13 passing through the array holes 17. One of the steel plates 12 is welded to the rectangular connection assembly, and the other steel plate 12 is welded to the middle beam 2. The array holes 17 opened on the energy dissipation connector 12 are arranged in an array, corresponding to each other on the two steel plates 12, and strict lofting should be carried out according to requirements. Hierarchical energy dissipation is realized through high-strength long bolt connection.

[0031] The column 1 and the rectangular connection assembly are connected through an energy dissipation plate 1. The middle beam 2 and the rectangular connection assembly are connected through a support energy dissipation structure. The left and right friction of the energy dissipation plate 7 realizes energy dissipation, and driving the up and down rotation and friction of the support energy dissipation structure realizes hierarchical energy dissipation. The beam is restored to the initial position after the earthquake through the SMA rod 15.

[0032] Through the above method, the utility model has a shock-absorbing and friction energy-dissipating function and a recoverable steel frame joint. The end beam and the middle beam are connected through a pin shaft, and then the energy dissipation plate is connected through high-strength short bolts, and the energy dissipation connector is connected through high-strength long bolts. If there is a certain vibration in the middle beam in the horizontal or vertical direction, the connector drives the energy dissipation plate and the energy dissipation connector to displace and friction to reduce the influence of vibration. The self-resetting function is realized through the SMA rod. When an earthquake occurs, the SMA rods are respectively in the tensile and compressive states at the same time and consume seismic energy. The energy dissipation connector can consume part of the vibration energy, and can avoid the energy dissipation plate from being prematurely stretched or squeezed and broken to lose the energy dissipation function. That is, while improving the strength of the connection node, the seismic effect of the connection node can be enhanced.

Claims

1. A recoverable steel frame node with the function of damping friction energy dissipation, characterized in that: It comprises a column (1), the side wall of the column (1) is connected to one end of an end beam (3), the side wall of the column (1) is located on the upper and lower sides of the end beam (3) and is connected to one end of an energy-absorbing plate (7) through longitudinal ribs (10) and locking nuts (11), the energy-absorbing plates (7) on the upper and lower sides are connected to a rectangular connection component, the middle of the rectangular connection component is connected to a pin shaft (6), the pin shaft (6) passes through the other end of the end beam (3), the pin shaft (6) is also connected to an intermediate beam (2), and a supporting energy-absorbing structure is also connected between the intermediate beam (2) and the rectangular connection component; The rectangular connection assembly comprises a U-shaped upper connection member (4) and a U-shaped lower connection member (5); the upper connection member (4) is connected to an energy-absorbing plate (7) at the upper end of the end beam (3); the lower connection member (5) is connected to an energy-absorbing plate (7) at the lower end of the end beam (3); the upper connection member (4) and the lower connection member (5) are connected via a pin (6) to form a rectangular frame; the upper connection member (4) and the middle beam (2) and the lower connection member (5) and the middle beam (2) are respectively connected to support energy-absorbing structures; The upright column (1) is located at the upper and lower sides of the end beam (3) and is also connected to one end of the SMA rod (15) via a rotating assembly, and the other end of each of the SMA rods (15) is connected to the outer wall of the rectangular connection assembly via another rotating assembly; The rotating assembly comprises a high-strength short bolt (8) and a base (14); the column (1) or the outer wall of the rectangular connecting assembly is connected to the base (14) via the high-strength short bolt (8), and further comprises a nut (9) connected to the high-strength short bolt (8); The supporting energy-absorbing structure comprises two energy-absorbing connecting members, and the two energy-absorbing connecting members are respectively connected between the upper and lower surfaces of the middle beam (2) and the rectangular connecting assembly; The energy dissipation connection member comprises two steel plates (12), each steel plate (12) having a plurality of support plates (16) welded at equal intervals on one side thereof, each support plate (16) being provided with interconnected array holes (17), the support plates (16) on the two steel plates (12) being connected by high-strength long bolts (13) passing through the array holes (17), one of the steel plates (12) being welded to the rectangular connection assembly, and the other of the steel plates (12) being welded to the middle beam (2).

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