Rotary friction energy dissipation self-resetting fabricated beam-column joint

Abstract

The utility model relates to the technical field of beam column joints, in particular to a rotating friction energy dissipation self-resetting assembly type beam column joint which comprises an assembly type steel column, an assembly type steel beam, a self-resetting structure and a connecting structure, and the self-resetting structure is arranged between the assembly type steel column and the assembly type steel beam and fixedly connected with the assembly type steel column and the assembly type steel beam through the connecting mechanism. The self-resetting structure comprises rotating T-shaped steel, rotating angle steel, a belleville spring group and a friction plate; the rotating T-shaped steel, the rotating angle steel and the belleville spring set are fixed together through bolts. According to the utility model, the field assembly is dry construction, the process is simple, and the construction speed is high; the force transmission path at the joint is clear, the beam-end shearing force is borne by the beam, the rotating T-shaped steel and the rotating angle steel, the beam-end bending moment is transmitted by the cover plate, and the node stress is reliable; when an earthquake occurs, deformation and energy consumption of the structure can be concentrated at the connecting position, outward movement of the plastic hinge is achieved, after the earthquake, the structure is free of residual deformation, self-resetting can be achieved, and the structure function can be rapidly recovered by replacing damaged parts at the connecting position.

Description

Technical Field

[0001] The utility model relates to the technical field of beam-column joints, and particularly relates to a rotational friction energy dissipation and self-centering assembled beam-column joint. Background Art

[0002] In past earthquake engineering research, to ensure that the seismic response of a structure is within a certain range, traditional design methods mainly keep structural members elastic. However, it is difficult to control the damage of members based on elastic design methods. Since the magnitude of future earthquakes cannot be accurately predicted, traditional design methods cannot ensure the safety of the structure under rare earthquakes and the resulting permanent residual deformation, leading to inability to reset. Therefore, in recent years, the research and development of earthquake engineering have shown a trend from earthquake resistance, seismic isolation and vibration reduction to recoverable function. Content of the Utility Model

[0003] Aiming at the deficiencies of the existing technology, the utility model provides a rotational friction energy dissipation and self-centering assembled beam-column joint. Its core area is a self-centering structure that replaces traditional weakening construction measures such as opening holes and slots in the web of assembled beams. While realizing the outward movement of the plastic hinge, the self-centering ability of the joint is provided by a disc spring group and a cover plate. Friction plates are arranged between the rotating contact surfaces to provide friction energy dissipation ability. The degree of weakening can be controlled by adjusting the bolt pre-tightening force, effectively reducing the post-earthquake residual deformation of the joint and enhancing the energy dissipation ability of the joint.

[0004] The specific technical solutions are as follows:

[0005] A rotational friction energy dissipation and self-centering assembled beam-column joint includes an assembled steel column, an assembled steel beam, a self-centering structure and a connecting structure. The self-centering structure is arranged between the assembled steel column and the assembled steel beam and is fixedly connected together through the connecting structure.

[0006] One side of the assembled steel column is provided with a cantilever beam in the shape of "I". The upper and lower flanges of the cantilever beam are first inclined plane protrusions with a plurality of bolt holes A, and the plurality of bolt holes A are symmetrically arranged. The middle web of the cantilever beam is provided with several bolt holes B. Reinforcing steel plates are respectively attached to both sides of the cantilever beam at the connection with the assembled steel column, and several bolt holes C are symmetrically arranged on the reinforcing steel plates. Bolts fix the two reinforcing steel plates and the cantilever beam.

[0007] The assembled steel beam is in the shape of "I". The upper and lower flanges at the connection end of the assembled steel beam and the assembled steel column are provided with second inclined plane protrusions the same as the first inclined plane protrusions, and a plurality of symmetrically arranged bolt holes D are provided thereon. The bolt holes D are correspondingly arranged with the bolt holes A. The middle web of the assembled steel beam is provided with several bolt holes E.

[0008] The self-centering structure includes a rotating T-shaped steel, a rotating angle steel, a disc spring group and a friction plate;

[0009] On both sides of the web of the rotating T-shaped steel, there are first convex circles with screw holes A in the center. Inside the first convex circles, there are first grooves arranged in a ring for placing the disc spring group and a rectangular friction plate groove in the middle position. On both sides of the flange of the rotating T-shaped steel, there are multiple bolt holes I symmetrically arranged; a friction plate is placed in the friction plate groove, and a screw hole C corresponding to the screw hole A is provided in the center of the friction plate;

[0010] The rotating angle steel is in an "L" shape, including a long angle steel plate and a short angle steel plate. On one side of the long angle steel plate, there is a second convex circle with the same structure size as the first convex circle. Inside the second convex circle, there is a second groove corresponding to the first groove. The size of the second groove is smaller than that of the first groove to facilitate rotation. A screw hole B is opened at the center of the second convex circle, and bolt holes G are opened on the short angle steel plate to facilitate connection with the connection structure;

[0011] The disc spring group includes sleeve a, sleeve b and multiple disc springs. Sleeve a and sleeve b are connected in series by multiple disc springs;

[0012] Multiple disc spring groups are respectively installed in the first grooves of the two first convex circles, the friction plate is installed in the friction plate groove on the first convex circle, and the second grooves on the second convex circles of the two rotating angle steels respectively correspond to the first grooves on the two first convex circles, so as to wrap the disc spring group

[0013] The screw passes through the screw hole C, the screw hole B and the screw hole A to fix the rotating T-shaped steel, the rotating angle steel and the disc spring group together.

[0014] The connection structure includes a cover plate and an angle steel;

[0015] The cover plate is rectangular. At both ends of one side of the cover plate, there are inclined surface grooves adapted to the first inclined surface protrusion and the second inclined surface protrusion, so that it coincides with the first inclined surface protrusion and the second inclined surface protrusion. Sliding grooves corresponding to the bolt holes on the first inclined surface protrusion and the second inclined surface protrusion are opened in the inclined surface grooves;

[0016] On both side angle steel plates of the angle steel, there are multiple bolt holes F and bolt holes H respectively; on one side angle steel plates of the two angle steels, they are symmetrically arranged on both sides of the middle web of the cantilever beam and the middle web of the assembled steel beam, and are fixedly connected by bolts passing through the bolt holes in the middle web. On the other side angle steel plates of the pair of angle steels close to the cantilever beam, they are fixedly connected with the flange of the T-shaped steel by bolts passing through the corresponding bolt holes; on the other side angle steel plates of the angle steels far from the cantilever beam, they are fixedly connected with the short angle steel plate of the rotating angle steel by bolts passing through the corresponding bolt holes.

[0017] The two cover plates are respectively buckled with the first inclined surface protrusion and the second inclined surface protrusion of the upper and lower flanges, and the bolts pass through the sliding grooves and the bolt holes on the inclined surface protrusions to fixedly connect the upper and lower flanges of the cantilever beam and the assembled steel beam.

[0018] A first disc spring is provided on the screw.

[0019] The beneficial effects of the present utility model are as follows:

[0020] 1. The present utility model is simple to assemble and reliable in force bearing. By using bolt connections between various components, on-site assembly is all dry-operation construction, with simple processes and fast construction speed; the force transmission path at the connection is clear, the shear force at the beam end is borne by the beam, the rotating T-shaped steel and the rotating angle steel, and the bending moment at the beam end is transmitted by the cover plate, and the node is reliable in force bearing.

[0021] 2. Deformation and energy dissipation are concentrated, and plastic damage is controllable. The node of the present utility model is a semi-rigid node. Through reasonable design, the deformation of the structure can be concentrated at the node connection, thereby forming a plastic hinge at the beam end. At the same time, the friction device at the connection can achieve concentrated energy dissipation under relative displacement. Correspondingly, the plastic damage of the structure is also concentrated here, effectively protecting the main components such as beams and columns.

[0022] 3. Meet the seismic performance objectives under different seismic risk levels. Under small and medium earthquakes, by designing the pre-tightening force applied on the disc springs of the cover plate and the self-resetting structure, the structure can be in the elastic stage; under large and huge earthquakes, the inclined surface protrusions at the ends of the cantilever beam and the flange of the prefabricated steel beam contact the inclined surface grooves at both ends of the cover plate, and the relative sliding friction gradually increases. During the continuous deformation process, the pressure of the disc spring group in the self-resetting structure gradually increases. While dissipating energy, it can bear a greater load, and the pre-tightening force on the screw in the self-resetting structure can also be adjusted to control the magnitude of the friction force, avoiding the phenomenon of intensified stress concentration at the web cut of the beam web caused by the weakening of the web cut.

[0023] 4. In high-rise and super high-rise steel frame buildings, the self-resetting structure can reduce the fatigue damage caused by wind loads. When subjected to earthquake action, the deformation and energy dissipation of the structure can be concentrated at the connection, realizing the outward movement of the plastic hinge. After the earthquake, the structure has no residual deformation and can achieve self-resetting, and the structural function can be quickly restored by replacing the damaged components at the connection.

[0024] 5. The overall device of the present utility model is relatively small in volume, does not need to occupy the building use space, and does not need prestressed tendons to provide self-resetting ability. The principle is very simple, the force transmission is clear, and the mechanical properties are easy to master. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the overall structure of a rotational friction energy dissipation and self-resetting prefabricated beam-column joint of the present utility model;

[0026] Figure 2 It is a schematic diagram of the prefabricated steel column structure of the present utility model;

[0027] Figure 3Schematic diagram of the assembled steel beam structure of the present utility model;

[0028] Figure 4 Schematic diagram of the overall structure of the self-resetting structure of the present utility model;

[0029] Figure 5 Schematic diagram of the assembly structure of the disc spring group, friction plate and rotating angle steel of the present utility model;

[0030] Figure 6 Schematic diagram of the rotating T-shaped steel structure of the present utility model;

[0031] Figure 7 Schematic diagram of the rotating angle steel structure of the present utility model;

[0032] Figure 8 Schematic diagram of the cover plate structure of the present utility model;

[0033] Figure 9 Schematic diagram of the friction plate structure of the present utility model;

[0034] Figure 10 Schematic diagram of the disc spring group structure of the present utility model;

[0035] Figure 11 Schematic diagram of the sleeve structure of the present utility model;

[0036] Figure 12 Schematic diagram of the sleeve a structure of the present utility model;

[0037] Figure 13 Schematic diagram of the sleeve b structure of the present utility model;

[0038] Figure 14 Schematic diagram of the angle steel structure of the present utility model;

[0039] Figure 15 Schematic diagram of the explosion structure of the rotating friction energy dissipation self-resetting assembled beam-column joint of the present utility model;

[0040] Wherein: 1, assembled steel column; 2, assembled steel beam; 3, angle steel; 4, rotating T-shaped steel; 5, rotating angle steel; 6, disc spring group; 7, cover plate; 8, friction plate; 9, sleeve a; 10, sleeve b; 11, screw; 12, first disc spring; 13, second disc spring; 1-1, bolt hole A; 1-2, bolt hole B; 1-3, bolt hole C; 2-1, bolt hole D; 2-2, bolt hole E; 3-1, bolt hole H; 3-2, bolt hole F; 4-1, first groove; 4-2, screw hole A; 4-3, friction plate groove; 4-4, bolt hole I; 5-1, second groove; 5-2, screw hole B; 5-3, bolt hole G; 7-1, sliding groove; 8-1, screw hole C. Detailed implementation manners

[0041] For better explanation and understanding of the present utility model, the technical solutions and effects of the present utility model will be described in detail below in conjunction with the attached Figures 1 - 15 drawings through specific embodiments.

[0042] As Figure 1 shown, a rotational friction energy dissipation and self - resetting prefabricated beam - column joint includes a prefabricated steel column 1, a prefabricated steel beam 2, a self - resetting structure and a connecting structure. The self - resetting structure is arranged between the prefabricated steel column 1 and the prefabricated steel beam 2 and is fixedly connected together through a connecting mechanism.

[0043] Specifically, as Figure 2 shown, one side of the prefabricated steel column 1 is provided with a cantilever beam in the shape of "I", which is convenient for connecting with the prefabricated steel beam 2 and the self - resetting structure. The upper and lower flanges of the cantilever beam are first inclined surface protrusions with a plurality of bolt holes A1 - 1, which are used for better cooperation with the connecting structure; the plurality of bolt holes A1 - 1 are symmetrically arranged for connecting with the connecting structure, so that the overall force is more uniform when the bolts are fixed; a plurality of bolt holes B1 - 2 are provided in the middle web of the cantilever beam for connecting with the self - resetting structure; reinforcing steel plates are respectively attached to both sides of the cantilever beam at the connection with the prefabricated steel column 1, and the reinforcing steel plates reinforce the connection and improve the strength; a plurality of bolt holes C1 - 3 are symmetrically arranged on the reinforcing steel plates, and bolts fixedly connect the two reinforcing steel plates with the cantilever beam; making the force more uniform.

[0044] As Figure 3 shown, the prefabricated steel beam 2 is in the shape of "I", which is convenient for connecting with the cantilever beam and the self - resetting structure. The upper and lower flanges at the connection end of the prefabricated steel beam 2 and the prefabricated steel column 1 are provided with second inclined surface protrusions the same as the first inclined surface protrusions. Through the setting of the same inclined surface protrusions, the force is more uniform; a plurality of symmetrically arranged bolt holes D2 - 1 are provided thereon, and the bolt holes D2 - 1 are correspondingly arranged with the bolt holes A1 - 1. A plurality of bolt holes E2 - 2 are provided in the middle web of the prefabricated steel beam 2 for connecting the self - resetting structure.

[0045] As Figure 4 、 5 shown, the self - resetting structure includes a rotating T - shaped steel 4, a rotating angle steel 5, a disc spring group 6 and a friction plate 8; among them, as Figure 6 shown, first convex circles with screw holes A4 - 2 in the center are provided on both side surfaces of the web of the rotating T - shaped steel 4. First grooves 4 - 1 for placing the disc spring group 6 and rectangular friction plate grooves 4 - 3 at the middle position are annularly arranged inside the first convex circles. A plurality of bolt holes I4 - 4 are symmetrically arranged on both sides of the flange of the rotating T - shaped steel 4; as Figure 9As shown, a friction plate 8 is placed in the friction plate groove 4-3, and the friction plate 8 provides the ability to dissipate energy through friction; a screw hole C8-1 corresponding to the screw hole A4-2 is provided at the center of the friction plate 8.

[0046] As Figure 7 shown, the rotating angle steel 5 is in an "L" shape, including a long angle steel plate and a short angle steel plate. A second convex circle having the same size as the first convex circle structure is provided on one side of the long angle steel plate. A second groove 5-1 corresponding to the first groove 4-1 is provided inside the second convex circle. The size of the second groove 5-1 is smaller than that of the first groove 4-1. When an external force is applied, the first groove 4-1 and the second groove 5-1 rotate relative to each other. Due to the different sizes of the first groove 4-1 and the second groove 5-1, when rotating, it is convenient for the grooves to be misaligned, causing the disc spring group to be compressed and realizing energy dissipation; when the external force disappears, the compression of the disc spring group disappears, and according to its own elastic property, it needs to return to its original state, so that the device realizes self-resetting. A screw hole B5-2 is provided at the center of the second convex circle, and a bolt hole G5-3 is provided on the short angle steel plate to facilitate connection with the connection structure.

[0047] As Figures 10 - 13 shown, the disc spring group 6 includes a sleeve a9, a sleeve b10, and a plurality of second disc springs 13. The sleeve a9 and the sleeve b10 are connected in series through a plurality of second disc springs 13; in this embodiment, 8 disc spring groups are respectively installed in the first grooves of the two first convex circles, the friction plate 8 is installed in the friction plate groove on the first convex circle, and the second grooves 5-1 on the second convex circles of the two rotating angle steels 5 respectively correspond to the first grooves 4-1 on the two first convex circles, so as to wrap the disc spring group 6.

[0048] The screw 11 passes through the screw hole B5-2 and the screw hole A4-2 to fix the rotating T-shaped steel 4, the rotating angle steel 5, and the disc spring group 6 together; a first disc spring 12 serving as a gasket is provided between the nut on the screw 11 and the rotating angle steel 5. The disc spring group and the friction plate are assembled between the rotating T-shaped steel 4 and the rotating angle steel 5 and form a self-resetting device through the screw 11. When an external force acts and the rotating T-shaped steel 4 and the rotating angle steel 5 rotate relative to each other, the disc spring group between them is compressed. After the external force disappears, due to the elastic action of the disc spring group, the device makes a recovery movement until the device returns to the initial state; in addition, the diameter of the screw 11 is determined according to the node force design; different models of the second disc springs 13 for the disc spring group 6 can be selected according to the bearing capacity and deformation requirements; by changing the pre-tightening force of the bolt and the material of the friction plate 8, the effect of dissipating energy through friction can be better realized according to the actual situation.

[0049] In this embodiment, the connection structure includes a cover plate 7 and an angle steel 3; as Figure 8As shown, the cover plate 7 is rectangular. At both ends of one side of the cover plate 7, there are inclined surface grooves adapted to the first inclined surface protrusion and the second inclined surface protrusion, so that it fits with the first inclined surface protrusion and the second inclined surface protrusion. A sliding groove 7-1 corresponding to the bolt holes on the first inclined surface protrusion and the second inclined surface protrusion is provided in the inclined surface groove. The distance between the inclined surface grooves at both ends is the same as the thickness of the rotating T-shaped steel 4. The cover plate 7 is connected to the cantilever beam and the assembled steel beam 2 through bolts to form a multi-stage variable friction energy dissipation device. When the cover plate 7 slides relative to the flange, the pre-tightening force will increase during the sliding process, so the friction force also increases accordingly. When the external force disappears, the cover plate plays an auxiliary self-resetting function.

[0050] As Figure 14 shown, there are a plurality of bolt holes F3-2 and bolt holes H3-1 on the two angle steel plates on both sides of the angle steel 3. As Figure 15 shown, one side angle steel plates of two pairs of angle steels 3 are symmetrically arranged on both sides of the middle web of the cantilever beam and the middle web of the assembled steel beam 2 respectively, and are fixedly connected by bolts passing through the bolt holes in the middle web. The other side angle steel plates of a pair of angle steels 3 close to the cantilever beam are fixedly connected to the flange of the T-shaped steel 4 by bolts passing through the corresponding bolt holes. The other side angle steel plates of the angle steels 3 far from the cantilever beam are fixedly connected to the short angle steel plates of the rotating angle steel 5 by bolts passing through the corresponding bolt holes, so as to realize the connection of the cantilever beam, the self-resetting mechanism and the assembled steel beam 2.

[0051] Two cover plates 7 are respectively buckled with the first inclined surface protrusion and the second inclined surface protrusion of the upper and lower flanges. Bolts pass through the sliding groove 7-1 and the bolt holes on the inclined surface protrusion to connect the upper and lower flanges of the cantilever beam and the assembled steel beam 2, realizing the connection of the overall structure. In this embodiment, the number and diameter of the bolts are determined according to the force conditions of the joints.

Claims

1. A rotational friction energy dissipation and self - resetting assembled beam - column joint, characterized in that: It includes prefabricated steel columns, prefabricated steel beams, self-centering structures and connection structures. The self-centering structures are arranged between the prefabricated steel columns and the prefabricated steel beams and are fixedly connected together through the connection structures.

2. The rotational friction energy dissipation and self - resetting prefabricated beam - column joint according to claim 1, characterized in that: One side of the prefabricated steel column is provided with a cantilever beam in the shape of "I". The upper and lower flanges of the cantilever beam are first inclined surface protrusions with a plurality of bolt holes A, and the plurality of bolt holes A are symmetrically arranged; a number of bolt holes B are provided in the middle web of the cantilever beam. Reinforcing steel plates are respectively attached to both sides of the cantilever beam at the connection with the prefabricated steel column, and a number of bolt holes C are symmetrically provided on the reinforcing steel plates. Bolts are used to fixedly connect the two reinforcing steel plates and the cantilever beam.

3. A rotational friction energy dissipation and self - resetting prefabricated beam - column joint according to claim 1, characterized in that: The prefabricated steel beam is in the shape of "I". The upper and lower flanges at the connection end of the prefabricated steel beam and the prefabricated steel column are provided with second inclined surface protrusions identical to the first inclined surface protrusions, and a plurality of symmetrically arranged bolt holes D are provided thereon. The bolt holes D are correspondingly arranged with the bolt holes A. A number of bolt holes E are provided in the middle web of the prefabricated steel beam.

4. A rotational friction energy dissipation and self - resetting prefabricated beam - column joint according to claim 1, characterized in that: The self-centering structure includes a rotating T-shaped steel, a rotating angle steel, a disc spring group and a friction plate; On both sides of the web of the rotating T-shaped steel, there are first convex circles with a screw hole A in the center. Inside the first convex circles, there are first grooves arranged in a ring for placing the disc spring group and a rectangular friction plate groove in the middle position. A number of bolt holes I are symmetrically arranged on both sides of the flange of the rotating T-shaped steel; a friction plate is placed in the friction plate groove, and a screw hole C corresponding to the screw hole A is provided in the center of the friction plate; The rotating angle steel is in the shape of "L" and includes a long angle steel plate and a short angle steel plate. One side of the long angle steel plate is provided with a second convex circle having the same structure size as the first convex circle. Inside the second convex circle, there is a second groove corresponding to the first groove. The size of the second groove is smaller than that of the first groove to facilitate rotation. A screw hole B is opened at the center of the second convex circle, and a bolt hole G is opened on the short angle steel plate to facilitate connection with the connection structure; The disc spring group includes a sleeve a, a sleeve b and a plurality of second disc springs. The sleeve a and the sleeve b are connected in series through a plurality of second disc springs; A plurality of disc spring groups are respectively installed in the first grooves of the two first convex circles, the friction plate is installed in the friction plate groove on the first convex circle, and the second grooves on the second convex circles of the two rotating angle steels respectively correspond to the first grooves on the two first convex circles to wrap the disc spring group; A screw passes through the screw hole C, the screw hole B and the screw hole A to fix the rotating T-shaped steel, the rotating angle steel and the disc spring group together.

5. A rotational friction energy dissipation and self - resetting prefabricated beam - column joint according to claim 1, characterized in that: The connection structure includes a cover plate and an angle steel; The cover plate is rectangular. At both ends of one side of the cover plate, there are inclined surface grooves adapted to the first inclined surface protrusion and the second inclined surface protrusion, so that it coincides with the first inclined surface protrusion and the second inclined surface protrusion. Sliding grooves corresponding to the bolt holes on the first inclined surface protrusion and the second inclined surface protrusion are opened in the inclined surface grooves; A plurality of bolt holes F and bolt holes H are respectively provided on the two side angle steel plates of the angle steel; one side angle steel plates of the two pairs of angle steels are respectively symmetrically arranged on both sides of the middle web of the cantilever beam and the middle web of the assembled steel beam, and are fixedly connected by bolts passing through the bolt holes in the middle web. The other side angle steel plates of the pair of angle steels close to the cantilever beam and the flange of the T-shaped steel are fixedly connected by bolts passing through the corresponding bolt holes; the other side angle steel plates of the angle steel far from the cantilever beam and the short angle steel plates of the rotating angle steel are fixedly connected by bolts passing through the corresponding bolt holes.

6. A rotational friction energy dissipation and self - resetting prefabricated beam - column joint according to claim 4, characterized in that: The two cover plates are respectively buckled with the first inclined plane protrusion and the second inclined plane protrusion of the upper and lower flanges, and bolts pass through the sliding grooves and the bolt holes on the inclined plane protrusions to fixedly connect the upper and lower flanges of the cantilever beam and the assembled steel beam.

7. A rotational friction energy dissipation and self - resetting assembled beam - column joint according to claim 4, characterized in that: A first disc spring is provided on the screw rod.

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