Hinge friction energy dissipation self-resetting steel beam column joint structure

Abstract

The utility model is suitable for the technical field of steel structures, and provides a hinge friction energy dissipation self-resetting steel beam column joint structure which comprises a steel column, a hinge friction energy dissipation self-resetting steel beam column and a hinge friction energy dissipation self-resetting steel beam column. The long steel beam is transversely arranged; the cantilever short steel beam is located between the steel column and the long steel beam, one end of the cantilever short steel beam is fixedly connected with a flange of the side wall of the steel column, and the other end of the cantilever short steel beam is connected with the long steel beam through a single hinge joint; and the friction self-resetting energy dissipaters are mounted on the upper and lower flanges of the short steel beam and the long steel beam of the cantilever and are used for realizing self-resetting. The single-hinge joint and the friction self-resetting energy dissipater are arranged, force transmission is clear, the structure is simple, economy and convenience are achieved, market requirements can be well met, the self-resetting function of the whole steel structure is achieved through self-resetting of the friction self-resetting energy dissipater, and the situation that due to damage of the energy dissipater, the whole joint is damaged is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel structures, and particularly relates to an articulated friction energy dissipation self-resetting steel beam-column node structure. Background Art

[0002] Steel structures have the advantages of fast construction speed, light weight, and good plasticity. As a common structural form of building structures, they are widely used. However, in a major earthquake, they still collapse. Most steel structure buildings collapse due to brittle failure at the beam-column joints. Under the external excitation of an earthquake, plastic hinges will form at the beam-column joints, and the appearance of plastic hinges will absorb and dissipate energy. Therefore, studying the energy dissipation capacity of plastic hinges is crucial to the seismic performance of steel structure buildings.

[0003] In order to facilitate the rapid repair of steel structure buildings after an earthquake, the energy-absorbing beam sections originally at the beam-column joints are separated and designed to apply energy-absorbing and shock-absorbing technology. Energy absorbers are set at the nodes to dissipate seismic energy through friction, buckling and other means of the energy absorbers, thereby reducing the damage to the overall structure under the action of the earthquake. Friction energy absorbers have the advantages of fast installation speed, clear force transmission and stable energy consumption and are widely used.

[0004] Although the existing ordinary energy absorbers can effectively dissipate earthquake energy, there are large residual deformations in steel structure buildings after earthquakes; traditional friction energy absorbers cannot self-reset their positions, and some friction energy absorbers cannot dissipate energy and are even damaged if they suffer secondary damage after an earthquake; the friction force of existing friction energy absorbers cannot be changed during an earthquake. If the friction coefficient is set relatively low, the energy absorber may start working under the action of a small earthquake. Under the action of a medium or large earthquake, the energy absorption of the energy absorber is poor and cannot fully dissipate the earthquake energy. If the friction coefficient is set relatively high, the energy absorber cannot be triggered to work under the action of a small earthquake; in addition, the energy absorbers used in the existing steel structure beam-column nodes are complex and too delicate in structure, and the reassembly speed after an earthquake is slow and uneconomical. Utility Model Content

[0005] The purpose of the embodiments of the utility model is to provide an articulated friction energy dissipation self-resetting steel beam-column node structure, aiming to solve the problems raised in the above-mentioned background technology.

[0006] The utility model is implemented as follows: an articulated friction energy dissipation self-resetting steel beam-column node structure, comprising:

[0007] A steel column, wherein the steel column is arranged vertically;

[0008] A long steel beam, wherein the long steel beam is arranged transversely;

[0009] A cantilever short steel beam, wherein the cantilever short steel beam is located between the steel column and the long steel beam, one end of the cantilever short steel beam is fixedly connected to the flange of the side wall of the steel column, and the other end of the cantilever short steel beam is connected to the long steel beam through a single hinged connector;

[0010] The friction self-resetting energy absorber is installed on the upper and lower flanges of the cantilever short steel beam and the long steel beam to achieve self-resetting.

[0011] Preferably, the single hinged connector comprises two ear plates, one ear plate is connected to the cantilever short steel beam, and the other ear plate is connected to the long steel beam, and the two ear plates are staggered and connected by an axle pin.

[0012] Preferably, the friction self-resetting energy dissipator comprises:

[0013] Z-shaped connecting plate;

[0014] A Y-shaped connecting plate connected to the Z-shaped connecting plate, wherein the contact surfaces of the Z-shaped connecting plate and the Y-shaped connecting plate are respectively provided with matching trapezoidal teeth;

[0015] A friction plate, installed between the Z-shaped connecting plate and the Y-shaped connecting plate;

[0016] Bolts are passed through the circular holes on the Y-shaped connecting plate and the friction plate and the waist-shaped holes on the Z-shaped connecting plate through butterfly washers to connect the Y-shaped connecting plate, the friction plate and the Z-shaped connecting plate.

[0017] Preferably, the friction plate is a brass plate or a high-strength aluminum plate.

[0018] An articulated friction energy-absorbing self-resetting steel beam-column node structure provided by an embodiment of the utility model is aimed at the problems in the prior art. It is provided with a single articulated connector and a friction self-resetting energy absorber. It has clear force transmission, simple structure, economy and convenience, and can well adapt to market demand. The use of variable friction can achieve the adaptability of energy consumption under external excitation, give full play to the working performance of the material, and realize the self-resetting function of the entire steel structure through the self-resetting of the friction self-resetting energy absorber, avoiding the overall destruction of the node caused by damage to the energy absorber. Compared with the overall replacement of other energy absorbers, the node structure can be quickly assembled, and the friction self-resetting energy absorber is easy to repair and replace after an earthquake. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional structural diagram of an articulated friction energy dissipation self-resetting steel beam-column node structure provided by an embodiment of the utility model;

[0020] Figure 2 An exploded view of a friction self-resetting energy dissipator in a hinged friction energy dissipation self-resetting steel beam-column node structure provided by an embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the structure of a friction self-resetting energy dissipator in a hinged friction energy dissipation self-resetting steel beam-column node structure provided by an embodiment of the utility model;

[0022] Figure 4 A schematic diagram of the structure of a Z-shaped connecting plate in a hinged friction energy dissipation self-resetting steel beam-column node structure provided by an embodiment of the utility model;

[0023] Figure 5 A schematic diagram of the structure of a Y-shaped connecting plate in a hinged friction energy dissipation self-resetting steel beam-column node structure provided by an embodiment of the utility model;

[0024] Figure 6 A state diagram of a hinged friction energy dissipation self-resetting steel beam-column node structure provided by an embodiment of the utility model under a normal service state without external excitation;

[0025] Figure 7 A state diagram of a hinged friction energy dissipation self-resetting steel beam-column node structure provided by an embodiment of the utility model in a state of ascending and sliding along a trapezoidal slope;

[0026] Figure 8 A state diagram of a hinged friction energy dissipation self-resetting steel beam-column node structure in a plane sliding state provided by an embodiment of the utility model.

[0027] In the attached figure: 1-single hinged connector; 2-friction self-resetting energy absorber; 3-cantilever short steel beam; 4-long steel beam; 5-steel column; 6-Z-shaped connecting plate; 7-axle pin; 8-Y-shaped connecting plate; 9-friction plate; 10-butterfly gasket; 11-bolt; 12-trapezoidal tooth mouth; 13-waist-shaped hole; 14-round hole. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0030] like Figure 1 As shown, it is a structural diagram of an articulated friction energy dissipation self-resetting steel beam-column node structure provided by an embodiment of the utility model, including:

[0031] A steel column 5, wherein the steel column 5 is arranged vertically;

[0032] A long steel beam 4, wherein the long steel beam 4 is arranged transversely;

[0033] A cantilever short steel beam 3, wherein the cantilever short steel beam 3 is located between the steel column 5 and the long steel beam 4, one end of the cantilever short steel beam 3 is fixedly connected to the flange of the side wall of the steel column 5, and the other end of the cantilever short steel beam 3 is connected to the long steel beam 4 through a single hinge connector 1;

[0034] The friction self-resetting energy absorber 2 is installed on the upper and lower flanges of the cantilever short steel beam 3 and the long steel beam 4 to achieve self-resetting.

[0035] In one embodiment of the utility model, the articulated friction energy-absorbing self-resetting steel beam-column node structure is provided with a single articulated connector 1 and a friction self-resetting energy absorber 2 to address the problems in the prior art. The structure has clear force transmission, simple structure, economy and convenience, and can well adapt to market demand. The use of variable friction can achieve the adaptability of energy consumption under external excitation, give full play to the working performance of the material, and realize the self-resetting function of the entire steel structure through the self-resetting of the friction self-resetting energy absorber 2, avoiding the overall destruction of the node caused by damage to the energy absorber. Compared with the overall replacement of other energy absorbers, the node structure can be quickly assembled, and the friction self-resetting energy absorber 2 is easy to repair and replace after an earthquake.

[0036] like Figure 1 As shown, as a preferred embodiment of the utility model, the single hinged connector 1 includes two ear plates, one ear plate is connected to the cantilever short steel beam 3, and the other ear plate is connected to the long steel beam 4. The two ear plates are staggered and connected by an axle pin 7.

[0037] The single-hinged connector 1 is composed of two ear plates that are staggered and plugged together and connected by an axle pin 7. The long steel beam 4 can rotate within a small range around the axle pin 7.

[0038] like Figures 2 to 5 As shown, as another preferred embodiment of the utility model, the friction self-resetting energy dissipator 2 includes:

[0039] Z-shaped connecting plate 6;

[0040] A Y-shaped connecting plate 8 is connected to the Z-shaped connecting plate 6, and matching trapezoidal teeth 12 are respectively provided on the contact surfaces of the Z-shaped connecting plate 6 and the Y-shaped connecting plate 8;

[0041] The friction plate 9 is installed between the Z-shaped connecting plate 6 and the Y-shaped connecting plate 8;

[0042] Bolts 11 pass through the circular holes 14 provided on the Y-shaped connecting plate 8 and the friction plate 9 and the waist-shaped holes 13 provided on the Z-shaped connecting plate 6 through the butterfly gasket 10 to connect the Y-shaped connecting plate 8, the friction plate 9 and the Z-shaped connecting plate 6.

[0043] Specifically, the friction plate 9 is a brass plate or a high-strength aluminum plate.

[0044] The friction self-resetting energy absorber 2 is connected to the cantilever short steel beam 3 and the long steel beam 4 by high-strength bolts to form a whole. The friction self-resetting energy absorber 2 is composed of a Z-shaped connecting plate 6, a Y-shaped connecting plate 8, a friction plate 9 and a butterfly gasket 10. The friction plate 9 can be made of a brass plate or a high-strength aluminum plate. A trapezoidal tooth opening 12 is arranged on one side of the connecting portion of the Z-shaped connecting plate 6 and the Y-shaped connecting plate 8. A waist-shaped hole 13 is provided on the Z-shaped connecting plate 6. A round hole 14 is provided on the Y-shaped connecting plate 8 and the friction plate 9. The Y-shaped connecting plate 8, the friction plate 9 and the Z-shaped connecting plate 6 are connected by bolts 11 and butterfly gaskets 10. The materials used in the friction self-resetting energy absorber 2 are convenient and easy to obtain, simple to process, and easy to promote in construction;

[0045] The variable friction of the energy absorber of the friction self-resetting energy absorber 2 is mainly achieved through the cooperation of the trapezoidal tooth opening 12 and the butterfly gasket 10. When the friction self-resetting energy absorber 2 is installed, a pre-tightening force needs to be applied to the bolt 11 so that there is no gap between the butterfly gasket 10 and each contact surface. The node working mode is divided into the following four states:

[0046] In the normal service state without external excitation: the load transfer in this state mainly depends on the static friction of each contact surface, such as Figure 6 As shown;

[0047] When sliding upward along the trapezoidal slope: When the contact surface overcomes the static friction, the contact surface of the connecting plate slides along the slope, and the contact surface of the connecting plate is disengaged along the direction of the screw rod, and a gap d appears. At this time, the sum of the compression of the screw rod and the spring is equal to d. The friction force on the friction plate 9 increases with the increase of d, such as Figure 7 As shown;

[0048] In the plane sliding state: as the connecting plates slide, the sum of the compression of the screw and the spring d reaches the maximum value. At this time, the positive pressure on the friction plate 9 reaches the maximum value, and the friction force remains unchanged. Figure 8 As shown;

[0049] In the state of sliding down along the trapezoidal slope: the state of sliding down along the slope is similar to the state of sliding up along the trapezoidal slope, but the friction force on the friction plate 9 decreases as d decreases.

[0050] The hinged friction energy-absorbing self-resetting steel beam-column node structure is provided with a friction self-resetting energy absorber 2 to change the node stiffness, so that the structure can exert an energy dissipation and shock absorption capability that is appropriate to the magnitude of the earthquake. Through the coordinated work of the butterfly gasket 10, bolts 11 and trapezoidal teeth 12 of the friction self-resetting energy absorber 2, the self-resetting function of the structure can be achieved. Compared with traditional steel structure beam-column nodes, it can be quickly assembled. After an earthquake, the friction self-resetting energy absorber 2 only needs to replace the friction plate 9, which is easy to repair and replace.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An articulated friction energy dissipation self-resetting steel beam-column node structure, characterized in that: include: A steel column (5), wherein the steel column (5) is arranged vertically; A long steel beam (4), wherein the long steel beam (4) is arranged transversely; A cantilever short steel beam (3), the cantilever short steel beam (3) being located between the steel column (5) and the long steel beam (4), one end of the cantilever short steel beam (3) being fixedly connected to the flange of the side wall of the steel column (5), and the other end of the cantilever short steel beam (3) being connected to the long steel beam (4) via a single hinged connector (1); The friction self-resetting energy absorber (2) is installed on the upper and lower flanges of the cantilever short steel beam (3) and the long steel beam (4) to achieve self-resetting.

2. The hinged friction energy dissipation self-resetting steel beam-column node structure according to claim 1 is characterized in that: The single hinged connector (1) comprises two ear plates, one ear plate is connected to the cantilever short steel beam (3), and the other ear plate is connected to the long steel beam (4), the two ear plates are staggered and connected via an axle pin (7).

3. The hinged friction energy dissipation self-resetting steel beam-column node structure according to claim 1 is characterized in that: The friction self-resetting energy dissipator (2) comprises: Z-shaped connecting plate (6); A Y-shaped connecting plate (8) connected to the Z-shaped connecting plate (6), wherein the contact surfaces of the Z-shaped connecting plate (6) and the Y-shaped connecting plate (8) are respectively provided with matching trapezoidal tooth openings (12); A friction plate (9) is installed between the Z-shaped connecting plate (6) and the Y-shaped connecting plate (8); A bolt (11) passes through a butterfly washer (10) through a circular hole (14) provided on the Y-shaped connecting plate (8) and the friction plate (9) and a waist-shaped hole (13) provided on the Z-shaped connecting plate (6), thereby connecting the Y-shaped connecting plate (8), the friction plate (9) and the Z-shaped connecting plate (6).

4. The hinged friction energy dissipation self-resetting steel beam-column node structure according to claim 3 is characterized in that: The friction plate (9) is a brass plate or a high-strength aluminum plate.

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