A recoverable shear wall depending on X-shaped arrangement of damping devices for energy dissipation and its construction method

Abstract

The present application relates to a kind of recoverable shear wall of energy dissipation by X-shaped arrangement damping device and its construction method, including reinforced concrete shear wall wall body, ordinary vertical distribution steel (23) and ordinary horizontal distribution steel are provided in reinforced concrete shear wall wall body, the left and right sides of the reinforced concrete shear wall wall body are equipped with vertical high-strength steel material, ordinary vertical distribution steel and ordinary horizontal distribution steel are arranged in front and back two rows of distribution steel mesh between the damping device of X-shaped arrangement, the damping device extends stress end to the four corners of reinforced concrete shear wall wall body, and stress end is anchored on reinforced concrete shear wall by steel strand and anchor plate.The present application not only can play the role of energy dissipation when being destroyed by external force, but also has the effect of recoverable shear wall form and function.

Description

Technical Field

[0001] This invention belongs to the field of seismic resistance of building structures, specifically relating to a recoverable shear wall that relies on X-shaped damping devices to dissipate energy and its construction method. Background Technology

[0002] Reinforced concrete shear walls are the main seismic-resistant structures in modern concrete engineering, and their load-bearing capacity and seismic performance are crucial to the safety and reliability of high-rise building structures. Under strong earthquakes, 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-centering shear wall structures and rocking shear wall structures have been proposed in recent years both domestically and internationally. These structures mainly improve the strength, safety reserve, and deformation capacity of the structure by incorporating high-strength steel bars or steel strands into the shear wall, thereby maintaining the structure's elastic properties under strong earthquakes, reducing residual deformation after an earthquake, and quickly restoring the structure's usability.

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

[0004] To address the shortcomings of the existing technology, the present invention aims to provide a recoverable shear wall that relies on an X-shaped damping device for energy dissipation, and its construction method. This shear wall not only possesses a recoverable function but also incorporates energy-dissipating and vibration-damping devices within the wall structure, exhibiting strong energy dissipation capabilities. This enhances the structure's energy dissipation and vibration-damping performance during earthquakes and allows for rapid restoration of the structure's usability after an earthquake. Simultaneously, it provides a simple and reliable construction method for realizing a recoverable reinforced concrete energy-dissipating shear wall.

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

[0006] This invention provides a recoverable shear wall that dissipates energy using an X-shaped damping device. The wall comprises a reinforced concrete shear wall body with ordinary vertical and horizontal reinforcing bars. High-strength reinforcement is provided on both the left and right sides of the shear wall body. Four dampers are arranged in an X-shape between two rows of vertical and horizontal reinforcing bars. The piston rods at the lower ends of the upper left damper, the lower right damper, the upper left damper, and the upper right damper are all cylindrical piston rods with hinge holes at their ends. The piston rod ends of the lower end of the upper left damper, the lower end of the upper right damper, the upper end of the lower left damper, and the upper end of the lower right damper form a rhombus structure. Steel plate connecting rods are provided on all four sides of the rhombus structure. Two connected steel plate connecting rods are connected to the piston rod ends via movable hinges. The steel plate connecting rods are housed within a rhombus-shaped connecting rod protective shell with grooves. Circular guide holes are provided at the four corners of the rhombus-shaped connecting rod protective shell. Annular connecting sleeves are provided on the circular guide holes, and the ends of the annular connecting sleeves have fixed edges. The annular connecting sleeves are fixed to the connecting flanges of the dampers via the fixed edges. The upper left damper... Steel strands are provided at the piston rod ends of the upper piston rods of the upper left damper, the lower piston rod ends of the lower left damper, and the lower piston rod ends of the lower right damper. These steel strands are anchored to the reinforced concrete shear wall via anchor plates. Corrugated metal pipes are provided around the steel strands of the upper piston rods of the upper left damper, the upper piston rods of the upper right damper, the lower piston rods of the lower left damper, and the lower piston rods of the lower right damper. Between the upper piston rod of the upper left damper and the lower piston rod of the upper left damper, and between the right... Cylindrical pistons are provided between the upper piston rod of the upper side damper and the lower piston rod of the lower right damper, between the upper piston rod of the lower left damper and the lower piston rod of the lower left damper, and between the upper piston rod of the lower right damper and the lower piston rod of the lower right damper. A cylindrical cylinder is provided outside the cylindrical piston. An annular gap is left between the cylindrical piston and the cylindrical cylinder. The lower end of the cylindrical cylinder is fixed to the connecting flange. A circular cover plate is provided at the upper end of the cylindrical cylinder. A sealed cavity is formed between the inner surface of the cylindrical cylinder, the piston rod and the outer surface of the cylindrical piston, and the connecting flange and the circular cover plate. The sealed cavity is filled with energy-dissipating material.

[0007] The high-strength reinforcing material is steel strand or fiber-reinforced composite material.

[0008] According to the above-mentioned recoverable functional energy-consuming reinforced concrete shear wall, the damper is a viscous damper, a viscoelastic damper, a magnetorheological fluid damper, or an electrorheological fluid damper.

[0009] According to the above-mentioned recoverable functional energy-consuming reinforced concrete shear wall, the rhomboid structure composed of steel plate connecting rods can freely expand and contract within the protective shell.

[0010] Based on the above-mentioned recoverable energy-dissipating reinforced concrete shear wall, the anchor point of the lower left anchor plate is A, the anchor point of the upper left anchor plate is B, the anchor point of the upper right anchor plate is C, and the anchor point of the lower right anchor plate is D.

[0011] All steel strands require the application of equal prestress.

[0012] The damper is a velocity-dependent damper that does not have initial stiffness, such as a viscous damper, a viscoelastic damper, or a magnetorheological / electrorheological fluid damper.

[0013] The rhomboid connecting rod protective shell has a cross-shaped arrangement of circular guide holes and square grooves inside, allowing the rhomboid connecting rod mechanism to extend and retract freely within the protective shell.

[0014] The cylindrical piston rod has a hinge hole at its end.

[0015] This invention also provides a method for constructing a recoverable functional energy-dissipating reinforced concrete shear wall, comprising the following steps:

[0016] Step 1: Install two rows of distributed steel mesh consisting of vertical high-strength reinforcing bars and ordinary steel bars. The ordinary horizontal and vertical distributed steel bars are connected by binding.

[0017] Step 2: Assemble the damper. First, connect the cylindrical piston and piston rod of the damper together. Then, install the connecting flange below the cylindrical cylinder of the damper. Insert the connected cylindrical piston and piston rod into the cylindrical cylinder from above, ensuring that the cylindrical piston rod with the hinge hole passes through the middle hole of the connecting flange. Finally, install the circular cover plate on top of the cylindrical cylinder.

[0018] Step 3: Connect the dampers to the rhomboid connecting rod protective shell. Place the four dampers at the four corners of the rhomboid connecting rod protective shell. Insert the cylindrical piston rod with hinge holes into the guide hole of the rhomboid connecting rod protective shell. Then, fix the connecting flange of the damper and the connecting sleeve at the four corners of the rhomboid connecting rod protective shell together, and install the steel plate connecting rod inside the rhomboid connecting rod protective shell. Finally, install the cover plate of the rhomboid connecting rod protective shell.

[0019] Step 4: Install the damper and diamond-shaped connecting rod protective shell. Place the metal corrugated pipe in the installation position and fix it to the steel mesh. Thread steel strands through the inside of the metal corrugated pipe. Then, place the connected damper into the installation position between the two rows of steel mesh from the top of the front and rear rows. Subsequently, connect the steel strands and the piston rod of the damper together. Finally, install the template and template support on the outside of the steel mesh, and fix the damper and diamond-shaped connecting rod protective shell to the template support.

[0020] Step 5: Pour concrete. After the concrete reaches the design strength, simultaneously tension and anchor four steel strands at the four corners of the wall.

[0021] The beneficial effects of the present invention are as follows: (1) The energy-dissipating shear wall with recoverable function of the present invention ensures the elastic performance of the structure under strong earthquake by setting high-strength reinforcement on the left and right sides of the wall, reduces the residual deformation of the shear wall after the earthquake, and makes the reinforced concrete shear wall recoverable, ensuring that the building can continue to be used after the earthquake; (2) The energy-dissipating shear wall with recoverable function of the present invention increases the energy dissipation capacity of the shear wall by setting energy-dissipating dampers in the wall, thereby reducing the dynamic response of the structure. The dampers are velocity-dependent dampers or magnetorheological / electrorheological fluid dampers, which do not affect the recovery of the deformation of the shear wall after the earthquake. (3) It provides a simple and reliable construction method for realizing the energy-dissipating reinforced concrete shear wall with recoverable function. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structural assembly of the present invention;

[0023] Figure 2 yes Figure 1 A schematic diagram of its vertical cross-section;

[0024] Figure 3 yes Figure 2 Schematic diagram of the FF cross section. Detailed Implementation

[0025] 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.

[0026] like Figure 1-3As shown, this invention provides a recoverable shear wall that dissipates energy by relying on an X-shaped arrangement of damping devices and its construction method. The shear wall includes a reinforced concrete shear wall body 21, ordinary vertical distributed steel bars 23 and ordinary horizontal distributed steel bars 24 in the reinforced concrete shear wall 21, and high-strength reinforcement 22 is arranged on the left and right sides of the shear wall; four dampers are arranged in an X-shaped cross pattern between the front and rear rows of distributed steel mesh composed of ordinary vertical distributed steel bars 23 and ordinary horizontal distributed steel bars 24. The cylindrical piston rods 31 with hinge holes at the inner ends of the four dampers are connected by movable hinges 1 and rhomboid steel plates. The connecting rods 2 are connected together. The rhomboid connecting rod 2 is set inside the rhomboid connecting rod protective shell 4 with a groove 3. The circular guide holes arranged in a cross shape on the rhomboid connecting rod protective shell 4 are fixed together with the connecting flange 34 of the damper. The rhomboid connecting rod protective shell 4, the cylindrical cylinder 35 of the damper and the reinforced concrete shear wall 21 are cast together. One end of the steel strand 5 is connected to the piston rod at the outer end of the damper. The steel strand 5 and the piston rod at the outer end of the damper are provided with a metal corrugated pipe 6. The other end of the steel strand 5 is anchored to point B of the reinforced concrete shear wall through the anchor 7. A, C and D are also anchoring points of the steel strand.

[0027] This invention also provides a method for constructing a recoverable functional energy-dissipating reinforced concrete shear wall, comprising the following steps:

[0028] Step 1: Install two rows of distributed steel mesh consisting of vertical high-strength reinforcing bars and ordinary steel bars. The ordinary horizontal and vertical distributed steel bars are connected by binding.

[0029] Step 2: Assemble the damper. First, connect the cylindrical piston and piston rod of the damper together. Then, install the connecting flange below the cylindrical cylinder of the damper. Insert the connected cylindrical piston and piston rod into the cylindrical cylinder from above, ensuring that the cylindrical piston rod with the hinge hole passes through the middle hole of the connecting flange. Finally, install the circular cover plate on top of the cylindrical cylinder.

[0030] Step 3: Connect the dampers to the rhomboid connecting rod protective shell. Place the four dampers at the four corners of the rhomboid connecting rod protective shell. Insert the cylindrical piston rod with hinge holes into the guide hole of the rhomboid connecting rod protective shell. Then, fix the connecting flange of the damper and the connecting sleeve at the four corners of the rhomboid connecting rod protective shell together, and install the steel plate connecting rod inside the rhomboid connecting rod protective shell. Finally, install the cover plate of the rhomboid connecting rod protective shell.

[0031] Step 4: Install the damper and diamond-shaped connecting rod protective shell. Place the metal corrugated pipe in the installation position and fix it to the steel mesh. Thread steel strands through the inside of the metal corrugated pipe. Then, place the connected damper into the installation position between the two rows of steel mesh from the top of the front and rear rows. Subsequently, connect the steel strands and the piston rod of the damper together. Finally, install the template and template support on the outside of the steel mesh, and fix the damper and diamond-shaped connecting rod protective shell to the template support.

[0032] Step 5: Pour concrete. After the concrete reaches the design strength, simultaneously tension and anchor four steel strands at the four corners of the wall.

[0033] Working principle of the invention:

[0034] Under seismic load, the shear wall structure will experience inter-story relative displacement. Points A and B at the upper left and right ends of the shear wall will experience horizontal relative displacement with respect to points C and D at the lower end. When the distance between points A and C is lengthened (while the distance between points B and D is shortened), due to the prestress applied to the steel strand 5, and the flexible system connecting A and B via the steel strand 5, the piston rod of the damper, the cylindrical piston 32 of the damper, the cylindrical piston rod 31 with hinge holes at the end, the movable hinge 1, and the steel plate connecting rod 2, the cylindrical pistons 32 of dampers a and c will move further apart under the tension of the steel strand 5. The cylindrical pistons 32 of dampers b and d move closer to each other under the tension of the cylindrical pistons 35 of the dampers a and c, and simultaneously, the lower left and upper right ends of the rhomboid steel plate connecting rod 2 are stretched, while the upper left and lower right ends of the rhomboid steel plate connecting rod 2 are shortened. When there is relative displacement between the cylindrical pistons and cylindrical cylinders of the dampers, energy dissipation and vibration reduction effects are generated, effectively consuming the seismic energy transmitted to the building structure and reducing the dynamic response of the structure under seismic loads, thus improving the seismic performance of the building structure. The same effect occurs when the distance between points B and D is stretched (while the distance between points A and C is shortened).

[0035] Because the high-strength reinforcement 22 set on the left and right sides of the reinforced concrete shear wall has high tensile strength and low elastic modulus, the structure remains in an elastic working state under strong earthquake action. Therefore, after the earthquake ends, the high-strength reinforcement 22 quickly pulls the reinforced concrete shear wall back to its original position with very little residual deformation, thus giving the structure a recoverable function.

[0036] 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 recoverable shear wall that dissipates energy by relying on an X-shaped damping device, comprising a reinforced concrete shear wall body (21), wherein the reinforced concrete shear wall body (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. The front and rear rows of distribution reinforcement mesh composed of ordinary vertical distribution reinforcement (23) and ordinary horizontal distribution reinforcement (24) are provided with an X-shaped damping device. The damping device extends the stress end to the four corners of the reinforced concrete shear wall (21). The stress end is anchored to the reinforced concrete shear wall through steel strand (5) and anchor plate (7). The damping device includes four dampers arranged in an X-shape. Each damper includes a cylindrical piston (32), a cylindrical cylinder (35) sleeved outside the cylindrical piston (32), and piston rods connected to both ends of the cylindrical piston (32). The inner ends of the piston rods facing inward of the four dampers are provided with hinge holes. The inner ends of the piston rods facing inward of the four dampers form a rhombus structure. Steel plate connecting rods (2) are provided on the four sides of the rhombus structure. The two connected steel plate connecting rods are connected to the piston rod ends by a movable hinge (1). A rhombus connecting rod protective shell (4) with a groove (3) is provided outside the steel plate connecting rod (2). Circular guide holes are provided at the four corners of the rhombus connecting rod protective shell (4). Circular connecting sleeves are provided on the circular guide holes. The end of the cylinder is fixed to the connecting flange (34) of the damper; the outer ends of the piston rods of the four dampers facing outward are the stress ends of the damping device, and each is connected to a steel strand (5). The steel strand (5) is anchored to the reinforced concrete shear wall through the anchor plate (7). The outer periphery of the steel strand is provided with a metal corrugated pipe (6); there is an annular gap between the cylindrical piston (32) and the cylindrical cylinder (35). The lower end of the cylindrical cylinder (35) is fixed to the connecting flange (34). The upper end of the cylindrical cylinder (35) is provided with a circular cover plate (36). A sealed cavity is formed between the inner surface of the cylindrical cylinder (35), the piston rod and the outer surface of the cylindrical piston (32), the connecting flange (34) and the circular cover plate (36). The sealed cavity is filled with energy-consuming material (37). The rhomboid structure formed by the steel plate connecting rod (2) can freely expand and contract within the protective shell; the high-strength reinforcing material is steel strand or fiber-reinforced composite material; the damper is a viscous damper, a viscoelastic damper, a magnetorheological fluid damper, or an electrorheological fluid damper.

2. The shear wall according to claim 1, characterized in that: The cylindrical piston (32), piston rod, and steel strand connected to the piston rod of the two dampers located at opposite corners of the rhomboid structure are arranged coaxially.

3. The shear wall according to claim 1, characterized in that: The rhomboid connecting rod protective shell, the cylindrical cylinder of the damper, and the reinforced concrete shear wall are cast together.

4. The shear wall according to claim 1, characterized in that: The coaxial dampers work together to dissipate energy and restore the shape and function of the reinforced concrete shear wall.

5. The method for constructing a shear wall according to any one of claims 1-4, characterized in that... The construction steps include the following: Step 1: Install two rows of distributed steel mesh consisting of vertical high-strength reinforcing bars and ordinary steel bars. The ordinary horizontal and vertical distributed steel bars are connected by binding. Step 2: Assemble the damper. First, connect the cylindrical piston and piston rod of the damper together. Then, install the connecting flange below the cylindrical cylinder of the damper. Insert the connected cylindrical piston and piston rod into the cylindrical cylinder from above, ensuring that the cylindrical piston rod with the hinge hole passes through the middle hole of the connecting flange. Finally, install the circular cover plate on top of the cylindrical cylinder. Step 3: Connect the dampers to the rhomboid connecting rod protective shell. Place the four dampers at the four corners of the rhomboid connecting rod protective shell. Insert the cylindrical piston rod with hinge holes into the guide hole of the rhomboid connecting rod protective shell. Then, fix the connecting flange of the damper and the connecting sleeve at the four corners of the rhomboid connecting rod protective shell together, and install the steel plate connecting rod inside the rhomboid connecting rod protective shell. Finally, install the cover plate of the rhomboid connecting rod protective shell. Step 4: Install the damper and diamond-shaped connecting rod protective shell. Place the metal corrugated pipe in the installation position and fix it to the steel mesh. Thread steel strands through the inside of the metal corrugated pipe. Then, place the connected damper into the installation position between the two rows of steel mesh from the top of the front and rear rows. Subsequently, connect the steel strands and the piston rod of the damper together. Finally, install the template and template support on the outside of the steel mesh, and fix the damper and diamond-shaped connecting rod protective shell to the template support. Step 5: Pour concrete. After the concrete reaches the design strength, simultaneously tension and anchor four steel strands at the four corners of the wall.

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