Detachable prestressed self-resetting viscous damping wall

Abstract

The invention discloses a detachable prestress self-resetting viscous damping wall, and belongs to the technical field of structural damping. According to the technical scheme, the device comprises an outer steel box, an upper shear plate and a prestress system. The outer steel box comprises a lower connecting plate, a lower damping steel box and an upper steel box, the lower damping steel box is filled with viscous damping liquid, a plurality of groups of outer rib plates are arranged in the upper steel box, and the upper steel box is connected with the lower damping steel box through high-strength bolts; the upper shear plate comprises an upper connecting plate and a shear plate, a plurality of groups of inner rib plates are arranged on two sides of the upper part of the shear plate, the lower part of the shear plate is inserted into the viscous damping fluid, and the inner rib plates are inserted into each group of outer rib plates of the upper steel box; the prestress system comprises an anchoring plate, a prestress spring and an anchor head. The structure has the beneficial effects that the good energy dissipation effect and self-resetting capacity are provided, and residual deformation of the structure after an earthquake is eliminated. A modularized damping wall structure is adopted, the internal space is abundant, all functional modules are clearly divided, and installation between structural layers is convenient and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of structural vibration reduction, and in particular to a detachable prestressed self-resetting viscous damping wall. Background Art

[0002] Recent earthquake damage has demonstrated that excessive residual deformation is a key factor in the functional failure of concrete frames. Self-righting technology can significantly suppress residual deformation and prevent structural failure. Improving the applicability and effectiveness of self-righting systems is crucial for enhancing the seismic resilience of concrete frames. Traditional displacement-dependent dampers conflict with self-righting systems, making it difficult to decouple the added damping and prestressing of the structure.

[0003] The damping effect of a viscous damping wall exhibits significant velocity dependence. Viscous damping walls only generate damping forces under dynamic conditions and have little effect on the structure under static conditions. This characteristic can be exploited to decouple the design of added damping from the prestressed system. Traditional viscous damping walls primarily consist of an outer steel box, shear plates, and a viscous damping fluid within the outer steel box. Under earthquake action, the structure experiences inter-story displacement, and the shear plates and the viscous damping fluid within the outer steel box shear, generating viscous damping forces and dissipating seismic energy. However, post-earthquake repair or removal costs are prohibitive. Therefore, the development of a prefabricated, detachable, and self-resetting viscous damping wall is of great significance. Summary of the Invention

[0004] In order to solve the above problems, the present invention proposes a detachable prestressed self-resetting viscous damping wall, which adopts a modular damping wall configuration, has ample internal space, clearly divided functional modules, is easy to install between structural layers, and has good compatibility with various types of structures, especially frame structures. While providing good shock absorption effect, it realizes self-resetting of structures or components.

[0005] To achieve the above object, the technical solutions adopted by the present invention are as follows:

[0006] A detachable prestressed self-resetting viscous damping wall comprises an outer steel box, an upper shear plate and a prestressed system. The outer steel box comprises a lower connecting plate, a lower damping steel box and an upper steel box. The lower damping steel box is filled with a viscous damping fluid.

[0007] The upper shear plate includes an upper connecting plate and a shear plate, and the lower portion of the shear plate is inserted into the viscous damping fluid;

[0008] The prestressed system includes an anchor plate, a prestressed spring and an anchor head.

[0009] Preferably, one side of the lower damping steel box is L-shaped, and bolt holes are opened on both sides of the flange.

[0010] Preferably, the upper steel box is L-shaped, with the web width smaller than the flange width, and bolt holes are opened on both sides of the flange, the positions of which correspond to the bolt holes on the flange of the lower damping steel box. The upper steel box and the lower damping steel box are connected by bolts.

[0011] Preferably, the bolts are high-strength bolts.

[0012] Preferably, several groups of external ribs are provided inside the upper steel box, each group includes two ribs, and the external ribs can be arranged in two groups, four groups, six groups, etc. to adapt to different prestressed design conditions.

[0013] Preferably, several groups of inner ribs are provided on both sides of the upper portion of the shear plate, each group comprising two ribs, and the distance between the two inner ribs in each group is smaller than the distance between the two outer ribs, and the inner ribs are inserted into each group of outer ribs of the upper steel box to achieve horizontal free movement of the upper shear plate.

[0014] Preferably, the anchor plate is U-shaped, and when installed, the flanges at both ends are respectively located on the outside of each group of outer ribs to limit the vertical movement of the anchor plate.

[0015] Preferably, a circular hole is opened at the center of the web of the anchor plate.

[0016] Preferably, the prestressed spring is located at the center of each group of inner ribs, that is, at the circular hole of the anchor plate web. After being tensioned, the prestressed spring passes through the central circular hole of the anchor plate web and is fixed by the anchor head to achieve prestressing.

[0017] The present invention can be divided into a lower viscous damping zone and an upper prestressed stress generating zone according to its function, thus achieving the decoupling of additional damping and prestressing. Specifically, the lower viscous damping zone utilizes the damping force formed by the shear plate and the viscous damping fluid to participate in the structural energy dissipation. The upper prestressed stress generating zone adopts a prestressed spring and a multi-cavity structure. The shear plate and the upper steel box form a cavity through a group of ribs, and a prestressed spring is arranged in the cavity. After the spring is tensioned to the specified load, it is fixed to the end of the anchor plate. Under the action of an earthquake, the inner and outer cavities shift with the deformation of the interlayer, and the prestressed spring will force the two to return to their initial shape, thereby producing a self-resetting effect.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] (1) The present invention is assembled from several modules, has the characteristics of assembly and disassembly, is easy to install, and can be quickly replaced and repaired after an earthquake.

[0020] (2) The present invention realizes the decoupling of additional damping and prestressing. The lower viscous damping zone provides additional energy dissipation, and the upper prestressing generating zone provides a self-resetting effect, thereby eliminating the residual deformation of the structure after earthquake. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0022] Figure 1 It is a front structural diagram of an embodiment of the present invention.

[0023] Figure 2 It is a side structural diagram of an embodiment of the present invention.

[0024] Figure 3 for Figure 1 Schematic diagram of the AA section.

[0025] Figure 4 for Figure 2 Schematic diagram of the middle BB section.

[0026] Figure 5 Schematic diagram of deformation when horizontal relative displacement occurs in an embodiment of the present invention.

[0027] Among them, the accompanying drawings are marked as follows: 11, lower connecting plate; 12, lower damping steel box; 13, upper steel box; 14, outer rib; 21, upper connecting plate; 22, shear plate; 23, inner rib; 31, anchor plate; 32, prestressed spring; 33, anchor head. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] Example 1

[0030] This embodiment provides a detachable prestressed self-resetting viscous damping wall, comprising an outer steel box, an upper shear plate, and a prestressed system. The outer steel box comprises a lower connecting plate 11, a lower damping steel box 12, and an upper steel box 13. The lower damping steel box 12 is filled with a viscous damping fluid. The upper shear plate comprises an upper connecting plate 21 and a shear plate 22. The lower portion of the shear plate 22 is inserted into the viscous damping fluid. The prestressed system comprises an anchor plate 31, a prestressed spring 32, and an anchor head 33. Figure 1 shown.

[0031] The upper connecting plate 21 and the lower connecting plate 11 are reliably connected to the upper and lower structures respectively. Figure 2 shown.

[0032] The lower damping steel box 12 is L-shaped on one side, and bolt holes are opened on both sides of the flange.

[0033] The upper steel box 13 is L-shaped, with the web width being smaller than the flange width, and bolt holes being provided on both sides of the flange, the positions of which correspond one-to-one to the bolt holes on the flange of the lower damping steel box.

[0034] The upper steel box 13 and the lower damping steel box 12 are connected by high-strength bolts.

[0035] Two groups of outer ribs 14 are provided inside the upper steel box 13, each group comprising two ribs. The outer ribs 14 can be adjusted to four, six, etc. groups according to actual prestressing requirements.

[0036] Two groups of inner ribs 23 are provided on both sides of the upper part of the shear plate 22, each group including two ribs. The inner ribs 23 can be adjusted according to the actual prestressing requirements, and the number corresponds to the outer ribs 14;

[0037] The distance between the two inner ribs 23 in each group is smaller than the distance between the two outer ribs 14; the inner ribs 23 are inserted into each group of outer ribs 14 of the upper steel box 13 to achieve horizontal free movement of the upper shear plate.

[0038] The anchor plates 31 are U-shaped and consist of two groups of four pieces. When installed, the flanges at both ends are located on the outside of each group of outer ribs 14 to limit the vertical movement of the anchor plates 31.

[0039] A circular hole is opened at the center of the web of the anchor plate 31 .

[0040] There are two prestressed springs 32, which are located at the center of the cavity of each group of inner ribs 23, that is, at the circular hole of the web of the anchor plate 31. After being stretched, the prestressed springs 32 pass through the central circular hole of the web of the anchor plate 31 and are fixed by the anchor head 33 to achieve prestressing. Figure 3 and Figure 4 shown.

[0041] See also Figures 1 to 5The assembly sequence of the self-resetting viscous damping wall is as follows: first, install the lower connecting plate 11 and the lower damping steel box 12 in place, and inject viscous damping liquid into the lower damping steel box 12; then insert the shear plate 22 with the upper connecting plate 21 and the inner rib 23 into the viscous damping liquid according to the designed height; then push the upper steel box 13 with the outer rib 14 into the corresponding position from the side, so that the bolt holes on both sides of the flange of the upper steel box 13 correspond to the bolt holes on both sides of the flange of the lower damping steel box 12 one by one, and use high-strength bolts to achieve reliable connection; finally, tension the prestressed spring 32 in the cavity formed by the inner rib 23, and place the flanges at both ends of each anchor plate 31 on the outside of each group of outer ribs 14, and fix the tensioned prestressed spring 32 through the anchor head 33.

[0042] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A detachable prestressed self-resetting viscous damping wall, comprising an outer steel box, an upper shear plate, and a prestressing system, characterized in that: The outer steel box comprises a lower connecting plate (11), a lower damping steel box (12) and an upper steel box (13); the lower damping steel box (12) is filled with viscous damping fluid; a plurality of groups of outer ribs (14) are provided inside the upper steel box (13); and the upper steel box (13) and the lower damping steel box (12) are connected by high-strength bolts.

2. The detachable prestressed self-resetting viscous damping wall according to claim 1 is characterized in that: Each group of outer ribs (14) comprises two ribs.

3. The detachable prestressed self-resetting viscous damping wall according to claim 1 is characterized in that: The upper shear plate comprises an upper connecting plate (21) and a shear plate (22). A plurality of groups of inner ribs (23) are provided on both sides of the upper portion of the shear plate (22). The lower portion of the shear plate (22) is inserted into the viscous damping fluid of the lower damping steel box (12).

4. The detachable prestressed self-resetting viscous damping wall according to claim 3 is characterized in that: Each group of inner ribs (23) includes two ribs, and the distance between the two inner ribs (23) in each group is smaller than the distance between the two outer ribs (14). The inner ribs (23) are inserted into each group of outer ribs (14) of the upper steel box (12).

5. The detachable prestressed self-resetting viscous damping wall according to claim 1 is characterized in that: The prestressed system comprises an anchor plate (31), a prestressed spring (32) and an anchor head (33).

6. The detachable prestressed self-resetting viscous damping wall according to claim 5 is characterized in that: The anchoring plate (31) is U-shaped, and a hole is opened in the center of the web. The flanges on both sides of the anchoring plate (31) are located outside each group of outer ribs (14).

7. The detachable prestressed self-resetting viscous damping wall according to claim 5 is characterized in that: The prestressed spring (32) is located at the center of each group of inner ribs (23). After being tensioned, the prestressed spring (32) passes through the center hole of the web of the anchor plate (31) and is fixed by the anchor head (33).

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