A novel shear energy dissipation type self-centering damper and method

Abstract

A novel shear energy-dissipating self-centering damper and method, comprising T-shaped connectors on both sides. A multi-slit energy-dissipating steel plate and a disc spring device are arranged between the T-shaped connectors, and the disc spring device is located on the left and right sides of the multi-slit energy-dissipating steel plate. Two groups of hinged interfaces are welded to the flange ends on the left and right sides of the T-shaped connector. The present invention has a shear energy-dissipating damper with high energy-dissipating efficiency and a self-centering function at the same time, so as to realize the rapid restoration of functions after an earthquake.

Description

Technical Field

[0001] The present invention relates to the technical field of aseismic structure systems, and particularly relates to a novel shear energy-dissipating self-centering damper and method. Background Art

[0002] Currently, most dampers adopt traditional single energy-dissipating forms. Although they can dissipate energy to a certain extent and reduce seismic responses, there are still certain defects. For example, the energy-dissipating efficiency and ultimate deformation capacity of existing energy-dissipating dampers are insufficient. In addition, in order to achieve replaceability after an earthquake, existing dampers are mostly connected to the main structure through bolts. However, due to the lack of effective self-centering measures, the residual deformation caused by an earthquake makes the damaged dampers inconvenient to replace, and thus it is difficult to quickly restore the structural function after an earthquake, affecting social stability and the safety of people's lives and property. Summary of the Invention

[0003] In order to overcome the above deficiencies of the prior art, the purpose of the present invention is to provide a novel shear energy-dissipating self-centering damper and method, which has a shear energy-dissipating damper with high energy-dissipating efficiency and a self-centering function at the same time, so as to achieve a rapid restoration of the post-earthquake function.

[0004] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0005] A novel shear energy-dissipating self-centering damper includes T-shaped connectors 1 on both sides. A multi-slit energy-dissipating steel plate 4 and a disc spring device 3 are arranged between the T-shaped connectors 1. The disc spring device 3 is located on the left and right sides of the multi-slit energy-dissipating steel plate 4. Two groups of hinge interfaces 5 are welded to the flange ends on the left and right sides of the T-shaped connector 1.

[0006] Two groups of ordinary bolt holes 6 are arranged on the flanges on the left and right sides of the T-shaped connector 1.

[0007] The bolt holes on one side of the T-shaped connector 1 adopt horizontal strip-shaped holes 7, vertical strip-shaped bolt holes 2 are arranged on the corresponding side of the energy-dissipating steel plate, ordinary bolt holes 8 are arranged on the other side of the T-shaped connector 1, and ordinary bolt holes 9 are also arranged on the corresponding side of the energy-dissipating steel plate.

[0008] For the multi-slit energy-dissipating steel plate 4, the width of the steel strip at different positions is determined by the following formula:

[0009]

[0010]

[0011]

[0012] Where f y is the yield strength of the multi-slit energy-dissipating steel plate, t is the thickness of the multi-slit energy-dissipating steel plate, V is the shear force, is the yield moment at the end, and L is the length of the multi-slit energy dissipation steel plate. The width of the steel strip at different positions can be obtained as follows:

[0013]

[0014] Moreover, the minimum width of the steel strip is 20% of the maximum width of the steel strip.

[0015] The disc spring device 3 includes an outer cylinder 10 and an inner cylinder 11. A number of disc springs 13 are arranged in the outer cylinder 10. Baffles 12 are arranged at both ends of the disc springs 13. The inner cylinder 11 passes through the inner holes of the disc springs 13 and the baffles 12 at both ends.

[0016] One end of the inner cylinder 11 is provided with a hinge joint 14, and one end of the outer cylinder is provided with a hinge joint 14.

[0017] An installation method of a novel shear energy dissipation type self-centering damper includes the following steps;

[0018] Step 1: Connect two energy dissipation steel plates 4 to the T-shaped connector 1 through detachable bolts to complete the installation of the energy dissipation device;

[0019] Step 2: Hinge two groups of disc spring devices 3 along the diagonal outside the energy dissipation steel plate 4 through pin bolts to complete the installation of the self-centering device.

[0020] Advantages of the present invention:

[0021] The use of the variable cross-section multi-slit steel plate in the present invention can maximize its plastic energy dissipation capacity;

[0022] The disc spring devices arranged diagonally not only provide self-centering ability but also overcome the problem of axial buckling of the steel plate;

[0023] The combined use of horizontal and vertical strip-shaped channels provides a certain redundant space for replacing the energy dissipation steel plate;

[0024] This energy dissipation and shock absorption device includes three energy dissipation mechanisms: plastic energy dissipation of the steel plate, frictional energy dissipation of the disc spring, and frictional energy dissipation between the connecting plate and the energy dissipation steel plate, and has the advantage of hierarchical multiple energy dissipation. Description of the Drawings

[0025] Figure 1 It is the front view of the novel shear energy dissipation type self-centering damper of the present invention.

[0026] Figure 2 It is the top view of the novel shear energy dissipation type self-centering damper of the present invention.

[0027] Figure 3 It is the side view of the novel shear energy dissipation type self-centering damper of the present invention.

[0028] Figure 4 Schematic diagram of the T-shaped connector of the present invention.

[0029] Figure 5 Top view of the T-shaped connector of the present invention.

[0030] Figure 6 Schematic diagram of the multi-slit energy dissipation steel plate of the present invention.

[0031] Figure 7 Partial schematic diagram of the multi-slit energy dissipation steel plate of the present invention

[0032] Figure 8 Schematic diagram of the disc spring device of the present invention.

[0033] Figure 9 Cross-sectional view of the disc spring device of the present invention.

[0034] Figure 10 Damage nephogram of the multi-slit energy dissipation steel plate.

[0035] Reference numerals:

[0036] T-shaped connector 1, vertical strip-shaped threaded hole 2, disc spring device 3, multi-slit energy dissipation steel plate 4, hinged joint of T-shaped connector 5, ordinary bolt hole on flange of T-shaped connector 6, horizontal strip-shaped bolt hole 7, ordinary bolt hole on web of T-shaped connector 8, ordinary bolt hole on multi-slit energy dissipation steel plate 9, outer cylinder of disc spring device 10, inner cylinder of disc spring device 11, baffle 12, disc spring 13, hinged joints at both ends of disc spring device 14. Detailed implementation manners

[0037] The present invention will be further described in detail below in conjunction with embodiments.

[0038] As Figures 1-9 shown, a new type of shear energy dissipation self-resetting damper includes a multi-slit energy dissipation steel plate 4, a T-shaped connector 1, and a disc spring device 3.

[0039] Further, the T-shaped connector 1 serves as a transition piece to realize the connection between the energy dissipation steel plate 4 and the disc spring device 3 and the main structure;

[0040] Further, two groups of hinged interfaces are welded at the end parts of the flanges on the left and right sides of the T-shaped connector 1. Considering that it is difficult to avoid relative residual deformation of the main structure after an earthquake even with a self-resetting device, the bolt holes on one side of the T-shaped connector 1 adopt horizontal strip-shaped holes 7, and vertical strip-shaped bolt holes are arranged on the corresponding side of the energy dissipation steel plate to leave a certain redundant space for replacing the energy dissipation steel plate. Ordinary bolt holes 9 are arranged on the energy dissipation steel plate on the corresponding side of the other side of the T-shaped connector 1.

[0041] Furthermore, for the multi-slit energy-dissipating steel plate 4, slits are opened to transform the steel plate mainly under shear force into a series of steel strips mainly under bending force, so as to increase the energy-dissipating capacity and plastic deformation capacity. After the steel plate is slit, the energy-dissipating units (steel strips) adopt a variable cross-section form, that is, the widths of the steel strips at different positions are calculated according to the principle that the external bending moment borne by the steel strip is equal to the yield bending moment of its cross-section, so as to maximize the yield energy-dissipating capacity of the steel. And the minimum width of the steel strip is limited at the position where the mid-span bending moment is the smallest to ensure the shear force transmission capacity here.

[0042] Furthermore, the disc spring device 3 includes an outer cylinder 10, an inner cylinder 11, disc springs 13 and a baffle 12. A number of disc springs 13 are designed and placed in the outer cylinder 10 according to actual needs. The baffle 12 is arranged at both ends of the disc springs 13. The inner cylinder 11 passes through the inner holes of the disc springs 13 and the baffle 12 at both ends. One end of the inner cylinder 11 is provided with a hinge joint, and one end of the outer cylinder 10 is provided with a hinge joint 14. The disc spring device 3 can ensure that the disc springs 13 are always in a compressed state whether under tensile or compressive force, so as to provide the required restoring force. The vertical component of this restoring force can ensure that the deformed energy-dissipating steel plate returns to the initial state, while the horizontal component of the restoring force can resist the axial forces generated by the left and right structures, avoiding the steel strip at the smaller cross-section of the mid-span from being buckled. At the same time, the conical surface friction existing between the discs under cyclic loading can provide a certain damping energy-dissipating capacity.

[0043] Furthermore, the disc spring device 3 is respectively hinged to the corresponding T-shaped connector 1 along the diagonal through the hinge joints 14 provided at both ends.

[0044] As Figure 10 shown, the numerical simulation analysis of the energy-dissipating steel plate 3 can show that no stress concentration occurs in the middle section of the steel plate, and local buckling will not occur in the energy-dissipating steel plate 3. Since the stress is mainly distributed along the edge of the steel strip, the energy-dissipating steel plate 3 yields along the edge of the steel strip, and its plastic energy-dissipating capacity can be maximized.

[0045] The installation process of a new type of shear energy-dissipating self-centering damper of the present invention is as follows:

[0046] As Figure 1 shown, two energy-dissipating steel plates 4 are connected to the T-shaped connector 1 through detachable bolts to complete the installation of the energy-dissipating device;

[0047] As Figure 1 and 2 shown, the two disc spring devices 3 are installed by connecting the hinge joints 5 of the T-shaped connectors on both sides of the energy-dissipating steel plate 3 to the hinge joints 14 of the disc spring devices, so as to complete the installation of the self-centering device.

[0048] After the earthquake action, the disc spring device 3 can basically reset the damper. Temporarily remove the disc spring on one side, and it is easy to replace the energy dissipation steel plate 4 in cooperation with the horizontal strip bolt hole 7 and the vertical strip bolt hole 2. Then reinstall and reset the disc spring device 3 to realize the reuse of the damper.

Claims

1. A shear energy-dissipating self-centering damper, characterized in that, It includes T-shaped connectors (1) on both sides. A multi-slit energy dissipation steel plate (4) and a disc spring device (3) are arranged between the T-shaped connectors (1). The disc spring device (3) is located on the left and right sides of the multi-slit energy dissipation steel plate (4). Two groups of hinged interfaces (5) are welded to the flange ends on the left and right sides of the T-shaped connectors (1). The bolt holes on one side of the T-shaped connector (1) adopt horizontal strip-shaped holes (7). Vertical strip-shaped bolt holes (2) are arranged on the corresponding side of the energy dissipation steel plate. The other T-shaped connector (1) is provided with ordinary bolt holes (8), and ordinary bolt holes (9) are also arranged on the corresponding side of the energy dissipation steel plate. The disc spring device (3) includes an outer cylinder (10) and an inner cylinder (11). A number of disc springs (13) are arranged in the outer cylinder (10). Baffles (12) are arranged at both ends of the disc springs (13). The inner cylinder (11) passes through the inner holes of the disc springs (13) and the baffles (12) at both ends. A hinged joint (14) is arranged at one end of the inner cylinder (11), and a hinged joint (14) is arranged at one end of the outer cylinder (10).

2. The shear energy-dissipating self-centering damper according to claim 1, wherein Two groups of ordinary bolt holes (6) are arranged on the flanges on the left and right sides of the T-shaped connector (1).

3. The shear energy-dissipating self-centering damper according to claim 1, wherein For the multi-slit energy dissipation steel plate (4), the widths of the steel strips at different positions are determined by the following formula: According to the moment balance relationship, it can be obtained that M y (x) = Vx (1) where Substituting Equation (2) and Equation (3) into Equation (1), it can be obtained that where f y is the yield strength of the multi-slit energy-dissipating steel plate, t is the thickness of the multi-slit energy-dissipating steel plate, V is the shear force, is the yield moment at the end, L is the length of the multi-slit energy-dissipating steel plate, and the width of the steel strip at different positions can be obtained: And the minimum width of the steel strip is 20% of the maximum width of the steel strip.

4. An installation method of a shear energy-dissipating self-centering damper according to any one of claims 1-3, characterized in that, It includes the following steps; Step 1: Connect two energy dissipation steel plates (4) to the T-shaped connector (1) through detachable bolts to complete the installation of the energy dissipation device; Step 2: Hinge (5) two groups of disc spring devices (3) diagonally outside the energy dissipation steel plate (4) through pin bolts to complete the installation of the self-resetting device.

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