Double recovery shear wall dissipating energy by means of ring section V-shaped damper

Abstract

The application discloses a double-recovery shear wall with energy dissipation of a ring-section V-shaped damper, which comprises a reinforced concrete shear wall body, wherein ordinary vertical distribution steel bars and ordinary horizontal distribution steel bars are arranged in the reinforced concrete shear wall body, vertical high-strength steel bars are arranged on the left and right sides of the reinforced concrete shear wall body, a ring-section V-shaped damper is arranged between front and back distribution steel bar nets formed by the ordinary vertical distribution steel bars and the ordinary horizontal distribution steel bars, a lower end fixed point of the ring-section V-shaped damper is the middle bottom of the reinforced concrete shear wall body, and an upper end of the ring-section V-shaped damper is anchored on the reinforced concrete shear wall body through a steel wire rope and a steel strand. The application can not only dissipate the energy of external destructive force through the ring-section V-shaped damper, so as to avoid excessive deformation of the shear wall, but also can restore the shape and function of the shear wall through the double action of the high-strength steel bars and the steel strand.

Description

Technical Field

[0001] This invention belongs to the field of seismic resistance of building structures, and specifically relates to a double-restoring shear wall that dissipates energy by means of a V-shaped damper with an annular cross section. Background Technology

[0002] Reinforced concrete shear walls are the main lateral force resisting components in modern concrete structural engineering, and their load-bearing capacity and seismic performance are crucial to the safety and reliability of high-rise building structures. Currently, the seismic design principle for high-rise building structures in my country is "no damage in minor earthquakes, repairable in moderate earthquakes, and no collapse in major earthquakes." Under strong earthquake action, reinforced concrete shear walls primarily dissipate seismic energy through elasto-plastic deformation. Therefore, after an earthquake, shear walls will inevitably suffer varying degrees of damage and significant residual deformation, making the structure difficult to repair and rendering it unusable, ultimately requiring demolition and reconstruction. To reduce residual deformation after an earthquake and quickly restore the structure's usability, self-resetting shear wall structures and swaying shear wall structures have been proposed in recent years both domestically and internationally. These structures primarily improve the strength, safety reserve, and deformation capacity of the structure by incorporating high-strength steel bars or steel strands within the shear wall, thereby maintaining elasticity under strong earthquake action, reducing residual deformation after an earthquake, and quickly restoring the structure's usability.

[0003] However, although self-resetting shear walls and rocking shear walls can ensure the elastic performance of the structure under strong earthquakes and realize the self-resetting function by setting high-strength steel bars or steel strands, the seismic response of the structure is often too large and the energy dissipation capacity is seriously insufficient. Summary of the Invention

[0004] To address the shortcomings of the prior art, the present invention aims to provide a dual-recovery shear wall that utilizes an annular cross-section V-shaped damper for energy dissipation. This shear wall not only possesses its own recoverable function but also incorporates an energy-dissipating and damping device with self-recovering capabilities within the wall structure, resulting in strong energy dissipation capacity. This reduces the seismic response of the structure during an earthquake and minimizes residual deformation after the earthquake, thereby rapidly restoring the structure's usability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a dual-restoration shear wall that dissipates energy using an annular cross-section V-shaped damper. The shear wall comprises a reinforced concrete shear wall body with ordinary vertical and horizontal distributed reinforcement bars. Vertical high-strength reinforcement bars are provided on both the left and right sides of the shear wall body. An annular cross-section V-shaped damper cylinder is positioned between two rows of distributed reinforcement meshes (front and rear) composed of the ordinary vertical and horizontal distributed reinforcement bars. The annular cross-section V-shaped damper cylinder is cast together with the reinforced concrete shear wall body. The annular cross-section V-shaped damper cylinder consists of an inner cylinder and an outer cylinder, forming an annular cross-section V-shaped damping channel between them. Piston rods are provided at both the left and right ends of the inner cylinder, with a cylindrical piston at the lower end of each piston rod. The piston rod on the left side of the inner cylinder... A sealed cavity is formed between the cylindrical piston at the lower end of the piston rod on the right side of the inner cylinder and the interior of the inner cylinder, and the sealed cavity is filled with fluid damping energy dissipation material; both ends of the cylinder of the annular cross-section V-shaped damper are fixedly provided with circular cylinder cover plates, and the lower surface of the circular cylinder cover plates is engraved with six fan-shaped annular channels evenly distributed along the circumference. The piston rod, the inner cylinder, the cylindrical piston, and the circular cylinder cover plates form an annular cylindrical chamber, and the annular cylindrical chamber is connected to the annular cross-section V-shaped damping channel through the fan-shaped annular channels; the upper ends of the piston rods on the left and right sides are connected with steel wire ropes, and the upper surfaces of the circular cylinder cover plates are connected with steel strands. The steel wire ropes and steel strands are surrounded by metal corrugated pipes, and the upper ends of the steel wire ropes and steel strands are anchored to the reinforced concrete shear wall through anchor plates.

[0007] According to the above-mentioned double-recovery shear wall that dissipates energy with the help of an annular cross-section V-shaped damper, an annular sealing groove is provided on the outer side of the cylindrical piston, and an O-ring is provided in the annular sealing groove.

[0008] According to the above-mentioned dual-recovery shear wall that dissipates energy with the help of annular cross-section V-shaped dampers, the high-strength reinforcement is steel strand or fiber-reinforced composite material reinforcement.

[0009] Based on the above-mentioned double-restoring shear wall that dissipates energy with the help of annular cross-section V-shaped dampers, the lower left concrete shear wall is located at point A, the anchor point of the upper left anchor plate is B, the anchor point of the upper right anchor plate is C, the lower right concrete shear wall is located at point D, and the lower end fixing point of the cylinder of the annular cross-section V-shaped damper is E.

[0010] According to the above-mentioned double-restoring shear wall that dissipates energy with the help of annular cross-section V-shaped dampers, the steel wire rope needs to be prestressed, while the steel strand does not need to be prestressed.

[0011] The beneficial effects of the present invention are as follows: (1) The present invention provides a double-recovery shear wall that dissipates energy by means of a V-shaped damper with an annular cross section. The high-strength reinforcement in the reinforced concrete shear wall, the circular cylinder cover plate of the damper, and the steel strands at the corner of the shear wall provide double elastic recovery force, so that the shear wall can recover to its original position as much as possible after an earthquake. Therefore, the energy-dissipating shear wall has strong self-recovery ability and can enhance the recoverability of the building structure, so that the structure can continue to be used after a strong earthquake. (2) The energy-dissipating shear wall with double self-recovery ability of the present invention uses velocity-dependent or intelligent damping materials, which does not affect the self-recovery performance of the post-earthquake device and the building structure; at the same time, it can also increase the damping and energy dissipation capacity of the structure, reduce the dynamic response of the building structure during earthquake, and thus increase the seismic performance of the structure. (3) The damper and the shear wall are cast together and can be reused. No replacement is required after an earthquake. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structural assembly of a double-restoring shear wall that dissipates energy using a V-shaped damper with an annular cross section according to the present invention.

[0013] Figure 2 yes Figure 1 A schematic diagram of its vertical cross-section;

[0014] Figure 3 yes Figure 2 Schematic diagram of the FF section;

[0015] Figure 4 yes Figure 2 Schematic diagram of the NN cross section. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0017] like Figure 1-4As shown, this invention provides a dual-restoration shear wall that dissipates energy using an annular cross-section V-shaped damper. It includes a reinforced concrete shear wall 21, which contains ordinary vertical distributed reinforcement 23 and ordinary horizontal distributed reinforcement 24. Vertical high-strength reinforcement 22 is provided on both the left and right sides of the reinforced concrete shear wall 21. An annular cross-section V-shaped damper cylinder 6 is located between the front and rear rows of distributed reinforcement mesh composed of the ordinary vertical and horizontal distributed reinforcement 23 and ordinary horizontal distributed reinforcement 24. The annular cross-section V-shaped damper cylinder 6 and the reinforced concrete shear wall 21 are cast together. The annular cross-section V-shaped damper cylinder 6 consists of an inner cylinder and an outer cylinder, forming an annular cross-section V-shaped damping channel 4 between the inner and outer cylinders. Piston rods 5 are provided at both the left and right ends of the inner cylinder, and a cylindrical piston 3 is provided at the lower end of the piston rod 5. The lower end of the piston rod 5 on the left side of the inner cylinder... The cylindrical piston 3 and the piston rod 5 on the right side of the inner cylinder form a sealed cavity with the interior of the inner cylinder. The sealed cavity is filled with fluid damping energy dissipation material 1. Both ends of the annular cross-section V-shaped damper cylinder 6 are fixedly provided with circular cylinder cover plates 10. The lower surface of the circular cylinder cover plate 10 is engraved with six fan-shaped annular channels 9 evenly distributed along the circumference. The piston rod 5, the inner cylinder 2, the cylindrical piston 3, and the cylinder cover plate 10 form a circle. The annular cylindrical chamber 8 is connected to the annular cross-section V-shaped damping channel 4 through the fan-shaped annular channel 9; the upper ends of the piston rods 5 on the left and right sides are connected to steel wire ropes 11, the upper surface of the circular cylinder cover plate 10 is connected to steel strands 12, and the steel wire ropes 11 and steel strands 12 are surrounded by metal corrugated pipes 13. The upper ends of the steel wire ropes 11 and steel strands 12 are anchored to the reinforced concrete shear wall 21 through anchor plates 14.

[0018] To increase the sealing between the cylindrical piston 3 and the inner cylinder 2, an annular sealing groove is provided on the outer side of the cylindrical piston 3, and an O-ring seal 7 is provided in the annular sealing groove.

[0019] The high-strength reinforcement 22 mentioned above is steel strand or fiber-reinforced composite material reinforcement; in the energy-dissipating shear wall with dual self-recovery capability mentioned above, the lower left concrete shear wall is located at point A, the anchor point of the upper left anchor plate is B, the anchor point of the upper right anchor plate is C, the lower right concrete shear wall is located at point D, and the lower end fixing point of the annular cross-section V-shaped damper cylinder (6) is E.

[0020] In order to reduce the elastic deformation of the wire rope 11 and to convert the relative displacement between the shear walls BE (or CE) into the relative displacement between the cylinder 6 of the annular section V-shaped damper and the piston rod 5 as much as possible, the wire rope 11 needs to be prestressed.

[0021] Working principle of the invention:

[0022] Under horizontal seismic loads, the shear wall structure will experience inter-story relative displacement. The upper left and right endpoints B and C of the shear wall will undergo reciprocating horizontal relative displacement relative to the lower point E, causing the distance between points B and E to lengthen or shorten. When the distance between points B and E lengthens (at the same time, the distance between points C and E shortens), since the cylinder 6 of the annular V-shaped damper is fixed at point E, and the wire rope connects point B (or point C) and the end of the piston rod, and the wire rope is prestressed, the wire rope 11 converts the relative displacement between the shear wall BE (or CE) into the relative displacement between the cylinder 6 of the annular V-shaped damper and the piston rod 5. The volume of the upper annular cylindrical cavity 8 on the left side of the damper decreases, and the damping energy-dissipating material flows into the upper annular cylindrical cavity on the right side of the damper through the fan-shaped annular channel 9 and the annular V-shaped damping channel 4. The piston and piston rod on the right side of the damper then move closer to point E under the action of liquid pressure. When the distance between points C and E is increased, the volume of the upper annular cylindrical cavity 8 on the right side of the damper decreases, and the damping energy-dissipating material flows into the upper annular cylindrical cavity on the left side of the damper through the fan-shaped annular channel 9 and the V-shaped damping channel 4. Therefore, during an earthquake, the damping energy-dissipating material flows back and forth in the V-shaped damping channel, generating damping force and energy dissipation and vibration reduction effects, thereby effectively dissipating the seismic energy transmitted to the building structure, reducing the dynamic response of the structure under seismic loads, and improving the seismic performance of the building structure.

[0023] Because the high-strength reinforcing bars 22 on the left and right sides of the reinforced concrete shear wall 21, as well as the steel strands 12 at connection point B (or point C) and the circular cylinder cover plate 10, have very high tensile strength, the structure remains in an elastic working state under strong earthquakes. Therefore, when there is residual deformation in the structure after a strong earthquake, due to the presence of residual deformation, the distance between AB (or CD) and the distance between BE (or CE) are stretched. The high-strength reinforcing bars 22 and the steel strands 12 generate elastic restoring forces due to the stretching. Due to the existence of dual restoring forces, the reinforced concrete shear wall is quickly pulled back to its original position with very small residual deformation, thus giving the structure dual recoverability.

[0024] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A double-restoring shear wall that dissipates energy using a V-shaped damper with an annular cross-section, comprising a reinforced concrete shear wall (21), wherein the reinforced concrete shear wall (21) is provided with ordinary vertical distributed reinforcement (23) and ordinary horizontal distributed reinforcement (24), characterized in that: The reinforced concrete shear wall (21) is provided with vertical high-strength reinforcement (22) on both the left and right sides. A ring-shaped V-shaped damper is provided between the front and rear rows of distributed reinforcement mesh composed of ordinary vertical distributed reinforcement (23) and ordinary horizontal distributed reinforcement (24). The lower end of the ring-shaped V-shaped damper is fixed at the middle of the bottom of the reinforced concrete shear wall (21). The upper end of the ring-shaped V-shaped damper is anchored to the reinforced concrete shear wall (21) by steel wire rope (11) and steel strand (12). The annular V-shaped damper includes an annular V-shaped damper cylinder (6) cast together with the reinforced concrete shear wall (21) and a circular cylinder cover plate (10) fixedly installed at both ends of the annular V-shaped damper cylinder (6). The annular V-shaped damper cylinder (6) includes an inner cylinder and an outer cylinder. An annular V-shaped damping channel (4) is formed between the inner cylinder and the outer cylinder. Piston rods (5) are provided at both the left and right ends of the inner cylinder. A cylindrical piston (3) is provided at the lower end of the piston rod (5). A sealed cavity is formed between the two cylindrical pistons (3) and the interior of the inner cylinder. The lower surface of the circular cylinder cover plate (10) is engraved with six fan-shaped annular channels (9) evenly distributed along the circumference. The piston rods (5) and the inner cylinder (2), cylindrical pistons (3), and circular cylinder cover plate (10) form an annular columnar cavity (8). The body cavity (8) is connected to the annular cross-section V-shaped damping channel (4) through the fan-shaped annular channel (9); the sealed cavity, the annular cylindrical cavity (8) and the annular cross-section V-shaped damping channel (4) are filled with fluid damping energy dissipation material (1); the upper ends of the piston rods (5) on the left and right sides are connected with steel wire ropes (11), the upper surface of the circular cylinder cover plate (10) is connected with steel strands (12), the steel wire ropes (11) and steel strands (12) are all surrounded by metal corrugated pipes (13), and the upper ends of the steel wire ropes (11) and steel strands (12) are all anchored to the reinforced concrete shear wall (21) through anchor plates (14); the outer side of the cylindrical piston (3) is engraved with an annular sealing groove, and an O-ring (7) is provided in the annular sealing groove; the anchor plate (14) is located at the upper left and upper right corners of the concrete shear wall (21).

2. The double-restoring shear wall according to claim 1, characterized in that: The piston rod (5) is arranged coaxially with the wire rope (11) on the same side; the bottom of the annular cross-section V-shaped damper is an arc-shaped cylinder, and the two wings of the annular cross-section V-shaped damper are straight cylinders.

3. The double-restoring shear wall according to claim 1, characterized in that: The high-strength reinforcing material (22) is steel strand or fiber-reinforced composite material.

4. The double-restoring shear wall according to claim 1, characterized in that: The wire rope (11) is prestressed, while the steel strand (12) is not prestressed.

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