A self-resetting energy dissipation coupled shear wall connection mode with super strong deformation capacity

Abstract

The application discloses a connecting mode of a self-resetting energy dissipation coupled shear wall with super strong deformation capacity, and the structure comprises two shear walls and a connecting unit, the connecting unit comprises left and right connecting beams connected with the shear walls through bolts, an elastic reset assembly arranged concentrically with the left and right connecting beams, two outer end plates for integrating the left and right connecting beams and the elastic reset assembly, and a friction energy dissipation assembly assembled on the side of the left and right connecting beams through bolts, the T-shaped steel flange in the connecting beam is connected with a threaded sleeve embedded in the shear wall through a bolt, the elastic reset assembly is arranged in the sleeve, the self-resetting function is realized through the elastic potential energy stored in the elastic reset assembly, the elastic reset assembly is composed of a disc spring and a series of prestressed reinforcement groups connected in series, and the ductility of the structure is greatly increased, a movable plate is arranged in the middle of the outer sleeve through a hole, a strip-shaped hole is formed in the middle of the inner sleeve, the movable plate and the inner sleeve are pressed through a pre-tightening bolt, the mutual displacement mechanism of the left and right connecting beams is utilized to cause the sliding friction of the movable plate and the inner sleeve, the sliding friction plays a role in friction energy dissipation, and the damage of the components can be effectively reduced or avoided, the energy dissipation function and the recoverable function of the coupled shear wall are realized, and the anti-seismic requirements of different levels can be met.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of civil engineering, and relates to a self-resetting energy dissipation coupled shear wall connection mode with super strong deformation capacity. BACKGROUND

[0002] Coupling beams are commonly used in coupled shear wall structures of multi-story and high-rise buildings, and mainly serve to transfer shear forces between coupled shear walls. Past seismic damage data show that the plastic deformation of the coupling beam is larger than that of the wall leg during an earthquake, and the internal force in the coupling beam is significantly higher than that in the wall leg due to the influence of high-order vibration modes. Therefore, the deformation and ductility of the coupling beam have a great influence on the stress and deformation of the shear wall, and the failure mode of the wall leg of the coupled shear wall is largely dependent on the stiffness ratio of the coupling beam to the wall leg. The stiffness, strength and ductility performance of the coupled shear wall are between those of a solid shear wall and two independent walls, and the degree depends on the stiffness of the coupling beam. However, general steel coupling beams or concrete coupling beams are not conducive to disassembly after damage, and have large residual deformation. Not only does this increase the risk of damage to the coupled shear wall, but it also causes difficulties in post-earthquake repair work. Moreover, the traditional self-resetting coupling beam basically uses a single pre-tensioned or pre-compressed elastic reset component, which results in insufficient ductility of the structure, and the use of high-ductility elastic reset components is expensive and not widely used in actual projects. In terms of the stress mechanism of the self-resetting coupling beam, the traditional self-resetting coupling beam is not concentrated in stress, and is prone to eccentricity and rotation.

[0003] In view of the above problems, the present application provides a self-resetting energy dissipation coupled shear wall connection mode with super strong deformation capacity, which not only facilitates the disassembly and repair of the connection unit in the coupled shear wall, but also enables the connection unit to be prefabricated in a factory, greatly improving construction quality and accelerating construction progress. In addition, the present application uses a disc spring and a series of prestressed reinforcement groups in series to form an elastic reset component, which increases the deformation capacity of the structure, enables the structure to meet the deformation requirements under strong earthquakes, and realizes controllable energy dissipation and self-resetting functions. The relative motion mechanism of the double sleeves used in the present application enables the connection unit to be concentrated in stress, and avoids or reduces local damage to the connection unit while ensuring good seismic performance of the structure. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the present application aims to provide a self-resetting energy dissipation coupled shear wall connection mode with super strong deformation capacity, which solves the problem of insufficient deformation capacity of building components and difficulty in restoring severe deformation after an earthquake in the prior art.

[0005] To achieve the above object and other related objects, the present application provides a self-resetting energy dissipation coupled shear wall connection mode with super strong deformation capacity, comprising two shear walls and a connection unit, the connection unit comprising left and right connecting beams connected with the shear walls through bolts, an elastic reset component arranged concentrically with the left and right connecting beams, two outer end plates making the left and right connecting beams and the elastic reset component into a whole, and a friction energy dissipation component assembled on the side of the left and right connecting beams through bolts.

[0006] The left connecting beam comprises an outer sleeve with a notch and a reserved square hole, and a first T-shaped steel with a first bolt hole reserved on a first flange plate, and the outer sleeve and the web of the first T-shaped steel are connected through welding; the right connecting beam comprises an inner sleeve with a first reserved strip hole and a first rectangular groove, and a second T-shaped steel with a second bolt hole reserved on a second flange plate, and the inner sleeve and the web of the second T-shaped steel are connected through welding; the inner and outer sleeves are arranged concentrically and assembled between the two shear walls.

[0007] The elastic reset component comprises two groups of prestressed tendons, a disc spring group, a spacer with a first reserved prestressed tendon hole, an inner end plate with a second reserved prestressed tendon hole, and a guide rod group, the guide rod is screwed on the inner end plate, and the disc spring group is assembled between the spacer and the inner end plate through the guide rod; the outer end plate comprises a first outer end plate and a second outer end plate, a bolt hole is reserved on the outer end plate, the first outer end plate and the inner end plate are tensioned by the first prestressed tendon group, the spacer and the second outer end plate are tensioned by the second prestressed tendon group, and the second prestressed tendon group and the first prestressed tendon group are arranged intersectingly.

[0008] The friction energy dissipation component comprises a movable plate with a first reserved bolt hole and a second rectangular groove, a first outer friction plate with a second reserved bolt hole, an inner friction plate with a second reserved strip hole, a second outer friction plate with a third reserved bolt hole, and a high-strength pre-tightening bolt, the movable plate, the friction plates and the inner sleeve are pre-tightened by the high-strength bolt.

[0009] Further, the T-shaped steel flange is symmetrically provided with two rows of bolt holes, and the shear wall is provided with two rows of embedded threaded sleeves at the corresponding positions, the bolt holes and the embedded threaded sleeves are connected by bolts, so that the T-shaped steel flange is connected to the shear wall.

[0010] Further, a plurality of the connection units are connected to the shear walls in sequence in the vertical direction, and the connection units share one piece of shear wall.

[0011] 1) The present application can reduce the residual deformation of the coupled shear wall. The traditional coupled shear wall dissipates seismic energy by destroying the connecting beam. When the connecting beam forms a plastic hinge at a large inter-story drift angle, the coupled shear wall will be damaged at the wall base, thereby causing residual deformation of the coupled shear wall. The present application provides structural restoring force through the pre-pressing and pre-tensioning of the elastic reset component, which can reset the structure after deformation, and the friction component dissipates seismic energy through friction, thereby effectively avoiding and reducing the residual deformation of the shear wall.

[0012] 2) The application can effectively solve the problem of increased wall spacing caused by traditional self-resetting coupling beams. The opening of the traditional self-resetting coupling beam intersection will cause the wall spacing to increase, thereby causing beam elongation effect. The hazards of beam elongation effect include: concrete floor is prone to cracking under tension, and the beam is prone to instability under local compression. The application introduces a vertical gap opening mechanism in the middle of the beam, effectively avoiding the problem of increased wall spacing.

[0013] 3) Compared with the traditional self-resetting coupling beam, the ductility of the application is greater. The traditional self-resetting coupling beam basically uses a single pre-tension or pre-compression elastic reset component. High ductility elastic reset components are expensive and rarely used in actual engineering. The application uses a combination of disc spring groups and series pre-stressed tendon groups in series to improve the deformation capacity of the structure. In the initial stage, the pre-stressed tendon and the disc spring deform at the same time. After the deformation of the disc spring is fully utilized, the pre-stressed tendon continues to deform, thereby effectively improving the deformation capacity of the structure. It is also to prevent damage to the pre-stressed tendon and the disc spring group, so that the elastic reset component can be reused.

[0014] 4) The application uses a double sleeve relative motion mechanism. The elastic reset component is concentric and compactly arranged with the double sleeve, which makes the connection unit force concentrated and does not produce eccentric effect, making the structure more stable. While ensuring good seismic performance of the structure, it avoids or reduces local damage to the components of the self-resetting device.

[0015] 5) The connection unit described in the application is connected to the shear wall by bolts, which not only facilitates disassembly and maintenance, but also can be applied to prefabricated buildings, greatly improving the construction quality. Whether cast-in-place concrete coupling beams or steel coupling beams are provided between the coupled shear walls, this will adversely affect the construction quality and construction progress. Moreover, the coupling beam and the shear wall connected by the traditional connection method are closely combined. Once the coupling beam cracks or is damaged, it is difficult to repair or replace it. The frictional energy dissipation device and the shear wall in the application are connected by bolts, which can effectively solve the above problems.

[0016] 6) The energy dissipation capacity and self-resetting function of the application are controllable. The application dissipates energy through the friction between the frictional energy dissipation components and realizes the self-resetting function through the restoring force of the elastic reset component. The energy dissipation capacity of the structure can be adjusted by adjusting the pre-tightening force of the pre-tightening bolt, and the restoring force of the elastic reset component can be adjusted by adjusting the size of the high-strength nut pre-tightening pre-stressed tendon and the disc spring group. In turn, the energy dissipation capacity and recovery capacity of the structure can be controlled.

[0017] 7) The application is suitable for industrial production and manufacturing, and simple on-site installation. All components of the application do not involve relatively complex processing technology, are convenient for batch production, thereby effectively reducing production cost, and have good economic benefits. All components are assembled through bolt connection and welding, which is convenient for construction and improves construction quality. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A three-dimensional structural diagram of a self-resetting energy dissipation coupled shear wall connection mode with super strong deformation ability provided for the embodiment of the application;

[0019] Figure 2 A front view of a self-resetting energy dissipation coupled shear wall connection mode with super strong deformation ability provided for the embodiment of the application;

[0020] Figure 3 A three-dimensional structural diagram of a shear wall in the application; Figure 2 A three-dimensional structural diagram of a shear wall in the application;

[0021] Figure 4a A three-dimensional structural diagram of a shear wall in the application; Figure 4b A three-dimensional structural diagram of a shear wall in the application; Figure 2 A three-dimensional structural diagram of a shear wall in the application; A three-dimensional structural diagram of a shear wall in the application;

[0022] A three-dimensional structural diagram of a shear wall in the application; Figure 5a A three-dimensional structural diagram of a shear wall in the application; 5b A three-dimensional structural diagram of a shear wall in the application; Figure 2 A three-dimensional structural diagram of a shear wall in the application; A three-dimensional structural diagram of a shear wall in the application;

[0023] A three-dimensional structural diagram of a shear wall in the application; Figure 6a A three-dimensional structural diagram of a shear wall in the application; 6b A three-dimensional structural diagram of a shear wall in the application; Figure 2 A three-dimensional structural diagram of a shear wall in the application; A three-dimensional structural diagram of a shear wall in the application;

[0024] A three-dimensional structural diagram of a shear wall in the application; Figure 7a A three-dimensional structural diagram of a shear wall in the application; 7b A three-dimensional structural diagram of a shear wall in the application; Figure 2 A three-dimensional structural diagram of a shear wall in the application; A three-dimensional structural diagram of a shear wall in the application;

[0025] A three-dimensional structural diagram of a shear wall in the application; Figure 8 A three-dimensional structural diagram of a shear wall in the application; A three-dimensional structural diagram of a shear wall in the application;

[0026] A three-dimensional structural diagram of a shear wall in the application; Figure 9a A three-dimensional structural diagram of a shear wall in the application; 9b A three-dimensional structural diagram of a shear wall in the application; Figure 2 A three-dimensional structural diagram of a shear wall in the application; A three-dimensional structural diagram of a shear wall in the application;

[0027] A three-dimensional structural diagram of a shear wall in the application; Figure 10a A three-dimensional structural diagram of a shear wall in the application; 10b A three-dimensional structural diagram of a shear wall in the application; A three-dimensional structural diagram of a shear wall in the application;

[0028] A three-dimensional structural diagram of a shear wall in the application; Figure 11The working schematic diagram when the application is displaced to the right;

[0029] Figure 12 The working schematic diagram when the application is displaced to the left. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the application by specific examples, and those skilled in the art can easily understand other advantages and effects of the application from the content disclosed in the specification.

[0031] It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the specification are only used to understand and read the content disclosed in the specification by those skilled in the art, and are not used to limit the conditions that can be implemented by the application, and therefore do not have technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that can be produced by the application and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the application. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" used in the specification are only for the convenience of clear description, and are not used to limit the scope of the application that can be implemented, and the change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the application that can be implemented.

[0032] Please refer to Figures 1 to 12 The application provides a connecting method of a self-resetting energy dissipation coupled shear wall with super strong deformation capacity. In the embodiment, the method comprises two shear walls 1, left and right coupling beams connected to the shear walls through bolts, elastic reset components arranged concentrically with the left and right coupling beams, two outer end plates making the left and right coupling beams and the elastic reset components into a whole, and friction energy dissipation components assembled on the side surfaces of the left and right coupling beams through bolts.

[0033] Specifically, the movable plate 61 is placed in the hole in the middle of the outer sleeve 21, and the first reserved strip-shaped hole 311 is opened in the middle of the inner sleeve 31, so that the pre-tightening bolt 65 can slide at the inner sleeve. The movable plate and the inner sleeve are pressed by the pre-tightening bolt. By the mutual displacement mechanism of the left and right coupling beams, the sliding friction of the movable plate and the inner sleeve can be caused, so that the friction energy dissipation component 6 absorbs energy to play a role of energy dissipation, and the self-resetting function is realized by the elastic restoring force of the elastic reset component 4. In the energy dissipation process, the deformation of the shear wall 1 is greatly reduced, thereby reducing or avoiding damage to the shear wall 1.

[0034] In the embodiment, the inner sleeve 31 and the outer sleeve 21 are welded on the first T-shaped steel web 222 and the second T-shaped steel web 322 respectively, the first flange plate 221 and the second flange plate 321 of the first T-shaped steel 22 and the second T-shaped steel 32 are provided with two rows of first bolt holes 2211 and second bolt holes 3211, and two threaded sleeves 11 are embedded in the corresponding shear wall 1, and the T-shaped steel flange plate is connected with the shear wall 1 through the high-strength bolt 7.

[0035] The elastic reset assembly 4 is connected in series with the first prestressed tendon group 41 and the second prestressed tendon group 42 through the superposition and combination of a plurality of disc spring washers 431, so as to enhance the structural ductility, and the elastic reset assembly 4 can store energy in stages, and can also protect the first prestressed tendon group 41 and the second prestressed tendon group 42 and the disc spring group 43 to a certain extent, so that the elastic reset assembly 4 can be repeatedly used.

[0036] The connecting unit is introduced into the coupled shear wall, and the energy dissipation function and the controllable recoverable function are realized.

[0037] In addition, in another embodiment of the present application, a plurality of connecting units can be arranged, and the connecting units are connected in sequence in the vertical direction.

[0038] In another embodiment of the present application, a plurality of connecting units can be arranged, and the connecting units are connected in sequence in the horizontal direction, and two adjacent connecting units share a shear wall.

[0039] Since all the components in the present application are assembled through bolt connection and welding, it is convenient for factory batch production, and has good economic benefits.

[0040] The working principle of the present application is as follows Figures 11 to 12As shown, the whole coupled shear wall of the present application will deform laterally when subjected to lateral load, and cause the shear wall 1 to tilt, and further cause the left and right coupling beams 2 and 3 to dislocate, in the process, the outer friction plate and the inner friction plate slide to dissipate energy. The elastic reset component 4 is subjected to the relative dislocation of the inner and outer sleeves 21 and 31, and through the outer end plate 5, the first and second pre-stressed tendon groups 41 and 42 are stretched, and the inner end plate and the stopper are moved towards each other to compress the disc spring group 43 to store elastic potential energy. When the lateral load disappears or weakens, the elastic potential energy in the elastic reset component 4 is released, and the elastic restoring force overcomes the sliding friction force in the friction energy dissipation component 6, so that the structure returns to the initial position. As can be seen, the connection can effectively integrate the friction energy dissipation and self-resetting functions.

[0041] In summary, the self-resetting energy dissipation coupled shear wall connection method with super deformation capacity provided in the embodiment of the present application can effectively reduce or avoid damage to the shear wall by the friction of the friction energy dissipation component, and can realize the self-resetting function by the elastic restoring force of the elastic reset component. The elastic reset component is composed of a series of pre-stressed tendon groups and disc spring groups in series. In the initial stage, the pre-stressed tendon and the disc spring deform at the same time, and after the disc spring is fully deformed, the pre-stressed tendon continues to deform, so that the structure deforms in stages, further improving the deformation capacity of the structure to meet the deformation requirement of the structure. The shear wall is connected by the connection unit, which not only facilitates installation, disassembly and maintenance, but also can weaken the adverse effects of the intermediate structural members such as the coupling beams on the shear wall, and can also ensure the energy dissipation capacity and self-resetting capacity. The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical idea disclosed by the present application should be covered by the claims of the present application.

Claims

1. A self-centering energy dissipation coupled shear wall connection structure with super strong deformation capacity, characterized in that: The connecting unit comprises left and right connecting beams (2 and 3) connected to the shear walls by bolts, an elastic reset assembly (4) arranged concentrically with the left and right connecting beams, two outer end plates (5) connecting the left and right connecting beams and the elastic reset assembly as a whole, and a friction energy dissipation assembly (6) assembled on the side of the left and right connecting beams by bolts. The left connecting beam comprises an outer sleeve (21) with a notch (211) and a reserved square hole (212), a first T-shaped steel (22) with a first bolt hole (2211) reserved on a first flange plate (221), and the outer sleeve and the first T-shaped steel web (222) are connected by welding; the right connecting beam comprises an inner sleeve (31) with a first reserved strip hole (311) and a first rectangular groove (312), a second T-shaped steel (32) with a second bolt hole (3211) reserved on a second flange plate (321), and the inner sleeve and the second T-shaped steel web (322) are connected by welding; the inner and outer sleeves are arranged concentrically and assembled between the two shear walls. The elastic reset assembly (4) comprises two groups of prestressed steel bars, a disc spring group (43), a spacer (44) with a first reserved prestressed steel bar hole (441), an inner end plate (45) with a second reserved prestressed steel bar hole (451), and a guide rod (46) screwed on the inner end plate; the disc spring group is assembled between the spacer and the inner end plate through the guide rod; the outer end plate (5) comprises a first outer end plate (51) and a second outer end plate, and a bolt hole (511) is reserved on the outer end plate; the first outer end plate and the inner end plate are tensioned by the first prestressed steel bar group (41), the spacer and the second outer end plate are tensioned by the second prestressed steel bar group (42), and the second prestressed steel bar group and the first prestressed steel bar group are arranged in cross. The friction energy dissipation assembly (6) comprises a movable plate (61) with a first reserved bolt hole (611) and a second rectangular groove (612), a first outer friction plate (62) with a second reserved bolt hole (621), an inner friction plate (63) with a second reserved strip hole (631), a second outer friction plate (64) with a third reserved bolt hole (641), and a high-strength prestressed bolt (65); the movable plate, the friction plates, and the inner sleeve are pre-tightened by the high-strength bolt.

2. The self-centering energy dissipation coupled shear wall connecting structure with super strong deformation capacity according to claim 1, characterized in that: The T-shaped steel flanges are symmetrically provided with two rows of bolt holes, and the shear walls are provided with two rows of embedded threaded sleeves at corresponding positions, and the bolt holes and the embedded threaded sleeves are connected by bolts to connect the T-shaped steel flanges to the shear walls.

3. The self-centering energy dissipation coupled shear wall connecting structure with super strong deformation capacity according to claim 1, characterized in that: A plurality of connecting units are connected to the shear walls in the vertical direction, and the connecting units share one piece of shear wall.

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