Assembly type multi-stage friction energy dissipation self-resetting column foot structure

Abstract

The utility model discloses an assembly type multi-order friction energy dissipation self-resetting column foot structure, which belongs to the technical field of earthquake prevention and disaster reduction of building structures and comprises a foundation assembly, rubber is arranged on the top surface of the foundation assembly, a friction energy dissipation assembly is arranged on the top surface of the rubber, and the friction energy dissipation assembly comprises a plurality of bottom friction plates fixedly connected with the rubber at equal intervals in the circumferential direction. A middle friction plate is fixedly connected to the center of the top face of each bottom friction plate, side friction plates are fixedly connected to the two sides of each middle friction plate respectively, a compound concrete-filled steel tube column is fixedly connected between the multiple bottom friction plates, and a self-resetting prestressed steel strand is arranged in the compound concrete-filled steel tube column, penetrates through the bottom friction plates and is fixedly connected with a foundation assembly. And the compound steel pipe concrete column is fixedly connected with the rubber. According to the utility model, when the prestressed tendons are exposed outside, the prestressed tendons can be prevented from being easily broken under the action of high-strength earthquakes, so that personnel injury is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of earthquake prevention and disaster reduction of building structures, and particularly relates to an assembled multi-stage friction energy dissipation self-resetting column foot structure. Background Art

[0002] The prior art discloses a self-resetting square steel tube concrete column foot node with a friction anchor device (publication number: CN 112081305 A), which includes a square steel tube concrete column, a concrete foundation, an energy dissipation device, a prestressed tendon and an anchor device for the prestressed tendon; the energy dissipation device is symmetrically arranged on both sides of the square steel tube concrete column, and the prestressed tendon is symmetrically arranged on the other two sides of the square steel tube concrete column; the anchor device includes a first T-shaped plate, a stiffening rib and a first connecting shaft. Compared with the existing self-resetting column foot prestressed tendon completely fixed anchoring method, the anchor device of the present invention can achieve friction anchoring, and within the design lateral displacement range, the anchoring method has the same effect as the completely fixed anchoring method; when the structural lateral displacement exceeds the design value, the anchor device slides, and the internal force of the prestressed tendon is maintained at a constant value, avoiding the problem of sudden rupture of the prestressed tendon or sudden drop in bearing capacity after yielding, and significantly improving the ductility of the node. The defect of this technical solution is that the prestressed tendons are exposed outside. When under the action of high-intensity earthquakes, the prestressing force is easy to break, causing injuries to people. At the same time, the foundation part of the device needs to be cast together with the square steel pipe column, which is not easy to transport and does not meet the requirements of the current stage of prefabricated development. Utility Model Content

[0003] The utility model aims to provide an assembled multi-stage friction energy dissipation self-resetting column foot structure to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following solution: The utility model provides an assembled multi-stage friction energy dissipation self-resetting column foot structure, including a basic component, the top surface of the basic component is provided with rubber, the top surface of the rubber is provided with a friction energy dissipation component, the friction energy dissipation component includes a plurality of bottom friction plates fixed to the rubber at equal circumferential intervals, a middle friction plate is fixed to the center of the top surface of the bottom friction plate, side friction plates are respectively fixed to the two sides of the middle friction plate, a compound steel tube concrete column is fixed between the plurality of bottom friction plates, a self-resetting prestressed steel strand is provided in the compound steel tube concrete column, the self-resetting prestressed steel strand passes through the bottom friction plate and is fixed to the basic component, and the compound steel tube concrete column is fixed to the rubber.

[0005] Preferably, the compound steel tube concrete column includes an outer steel tube fixed to the rubber, the outer steel tube is fixed to the middle friction plate, an inner steel tube is arranged inside the outer steel tube, an inner stiffening rib is fixed between the outer steel tube and the inner steel tube, a column bottom plate is fixed to the bottom surface of the outer steel tube, the column bottom plate is fixed in the rubber, a first through hole is arranged at the center of the column bottom plate, and the space between the outer steel tube and the inner steel tube is filled with concrete.

[0006] Preferably, the self-resetting prestressed steel strand is fixedly connected to the inner top surface of the inner steel pipe, the self-resetting prestressed steel strand passes through the first through hole and is fixedly connected to a steel strand anchor, and the steel strand anchor is fixedly connected to the foundation assembly.

[0007] Preferably, the middle friction plate is symmetrically provided with first through grooves, the side friction plate and the middle friction plate are fixedly connected by a plurality of first bolts, and the first bolts pass through the first through grooves respectively.

[0008] Preferably, second grooves are respectively provided on both sides of the side friction plate, and NAO friction plates are fixedly connected in the second grooves. The NAO friction plates and the side friction plates are fixedly connected by the first bolts.

[0009] Preferably, a pressure-resistant bottom plate is provided below the bottom friction plate, the pressure-resistant bottom plate is located on the bottom surface of the rubber, a plurality of second bolts are passed through the bottom friction plate and the pressure-resistant bottom plate, and the second bolts are respectively fixedly connected to the basic components.

[0010] Preferably, the foundation assembly includes a foundation base for placing the rubber, the bottom surface of the foundation base is fixedly connected to a foundation base plate, the steel strand anchor is located on the bottom surface of the foundation base plate, the self-resetting prestressed steel strand passes through the foundation base plate and is fixedly connected to the steel strand anchor, and the second bolt passes through the foundation base plate and is fixedly connected to the foundation base plate.

[0011] The utility model discloses the following technical effects: the utility model can prevent the prestressed tendons from being easily broken under high-intensity earthquakes when the prestressed tendons are exposed to the outside, causing injuries to people, and at the same time ensure that the column base of the steel tube concrete column can rotate under the action of an earthquake, bear part of the bending moment under the action of an earthquake, and realize lossless recovery of the column base under a small earthquake, and no or slight damage to the column base under a large earthquake, so that the column base is in an elastic state during the rotation process of the column base, thereby avoiding plastic deformation and damage in the post-earthquake structure to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0013] Figure 1 This is a structural schematic diagram of the utility model's assembled multi-stage friction energy dissipation self-resetting column foot structure;

[0014] Figure 2 It is a structural schematic diagram of a composite steel tube concrete column;

[0015] Figure 3 It is a structural schematic diagram of the friction energy dissipation component;

[0016] Figure 4 A schematic diagram of the structure of the foundation base;

[0017] Figure 5 A schematic diagram of the structure of the base plate;

[0018] Figure 6 Schematic diagram of the connection structure between the bottom friction plate and the middle friction plate;

[0019] Figure 7 This is a schematic diagram of the installation structure of the NAO friction plate;

[0020] Figure 8 It is a structural schematic diagram of the compression bottom plate.

[0021] In the figure: 1. Compound steel tube concrete column; 1-1. Outer steel tube; 1-2. Concrete; 1-3. Inner steel tube; 1-4. Inner stiffening rib; 1-5. Self-resetting prestressed steel strand; 1-6. Column base plate; 1-7. Steel strand anchor; 2. Friction energy dissipation component; 2-1. Middle friction plate; 2-2. Bottom friction plate; 2-3. Side friction plate; 2-4. NAO friction plate; 2-5. Compression bottom plate; 2-6. First bolt; 2-7. Second bolt; 3. Rubber; 4. Foundation component; 4-1. Foundation base; 4-2. Foundation bottom plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Reference Figure 1-Figure 8As shown, the utility model provides an assembled multi-stage friction energy dissipation self-resetting column foot structure, including a basic component 4, a rubber 3 is provided on the top surface of the basic component 4, a friction energy dissipation component 2 is provided on the top surface of the rubber 3, the friction energy dissipation component 2 includes a plurality of bottom friction plates 2-2 fixed to the rubber 3 at equal intervals in the circumferential direction, a middle friction plate 2-1 is fixed to the center of the top surface of the bottom friction plate 2-2, side friction plates 2-3 are respectively fixed to the two sides of the middle friction plate 2-1, a compound steel tube concrete column 1 is fixed between the plurality of bottom friction plates 2-2, a self-resetting prestressed steel strand 1-5 is provided in the compound steel tube concrete column 1, the self-resetting prestressed steel strand 1-5 passes through the bottom friction plate 2-2 and is fixed to the basic component 4, and the compound steel tube concrete column 1 is fixed to the rubber 3.

[0025] The utility model has a simple structure and is easy to use. All components can be manufactured in the factory and assembled in sequence after being transported to the site. There is no need to carry out welding work on site. The installation steps are simple and clear, and the requirements for construction personnel are not high. All energy-consuming components can be quickly disassembled and reinstalled and repaired when damaged, which can implement the development concept of self-resetting structural repairability.

[0026] A further optimized solution is provided, in which the compound steel tube concrete column 1 comprises an outer steel tube 1-1 fixed to the rubber 3, the outer steel tube 1-1 is fixed to the middle friction plate 2-1, an inner steel tube 1-3 is arranged inside the outer steel tube 1-1, an inner stiffening rib 1-4 is fixed between the outer steel tube 1-1 and the inner steel tube 1-3, a column base plate 1-6 is fixed to the bottom surface of the outer steel tube 1-1, the column base plate 1-6 is fixed in the rubber 3, a first through hole is arranged at the center of the column base plate 1-6, and concrete 1-2 is filled between the outer steel tube 1-1 and the inner steel tube 1-3.

[0027] According to a further optimization scheme, a self-resetting prestressed steel strand 1-5 is fixedly connected to the inner top surface of the inner steel pipe 1-3. The self-resetting prestressed steel strand 1-5 passes through the first through hole and is fixedly connected to a steel strand anchor 1-7. The steel strand anchor 1-7 is fixedly connected to the foundation component 4.

[0028] The inner stiffening rib 1-4 is welded to the inner surface of the outer steel pipe 1-1 and the outer surface of the inner steel pipe 1-3 to form a steel pipe assembly; the inner stiffening rib 1-4 can better transmit the force of the inner and outer steel pipes, and it is also convenient for accurate control of construction during prefabrication, and avoids the outer steel pipe 1-1 from tearing due to excessive force; the inner steel pipe 1-3 and the outer steel pipe 1-1 are aligned with the center of the column base plate 1-6 respectively, and the inner steel pipe 1-3 and the outer steel pipe 1-1 are welded to the column base plate 1-6 respectively to form an inner steel pipe assembly; subsequently, the inner cavity of the inner steel pipe assembly and the inner cavity of the outer steel pipe assembly are filled with concrete 1-2. After the pouring is completed, the self-resetting prestressed steel strand 1-5 passes through the column base plate 1-6 through the reserved first through hole to form a steel pipe concrete column assembly, thereby improving the overall strength. At the same time, the edge friction plate 2-3 can also be welded to the outer steel pipe 1-1 in the factory, which is convenient for direct bolt connection on site.

[0029] According to a further optimization scheme, first through grooves are symmetrically provided on the middle friction plate 2-1, and the side friction plate 2-3 and the middle friction plate 2-1 are fixedly connected by a plurality of first bolts 2-6, and the first bolts 2-6 pass through the first through grooves respectively.

[0030] According to a further optimization scheme, second grooves are respectively provided on both sides of the side friction plate 2-3, in which the NAO friction plate 2-4 is fixedly connected, and the NAO friction plate 2-4 and the side friction plate 2-3 are fixedly connected by a first bolt 2-6.

[0031] According to a further optimization scheme, a pressure-resistant bottom plate 2-5 is provided below the bottom friction plate 2-2, and the pressure-resistant bottom plate 2-5 is located on the bottom surface of the rubber 3. A plurality of second bolts 2-7 are passed through the bottom friction plate 2-2 and the pressure-resistant bottom plate 2-5, and the second bolts 2-7 are fixedly connected to the base components 4 respectively.

[0032] The middle friction plate 2-1 is connected to the side friction plates 2-3 on both sides by applying pre-tightening force through the first bolts 2-6. The middle friction plate 2-1 is connected to the bottom friction plate 2-2 by welding in the prefabrication plant. The bottom friction plate 2-2 is connected to the pressure-resistant bottom plate 2-5 and the basic bottom plate 4-2 through the second bolts 2-7. The rubber 3 is placed at the reserved position of the basic base 4-1 to form a multi-stage energy dissipation device.

[0033] The contact interface at the center of the compound steel tube concrete column 1 and the center of the friction energy dissipation component 2 is tightly aligned, and the first through hole and the hole position of the prestressed tendon of the friction energy dissipation component 2 are aligned with each other to self-reset the prestressed steel strands 1-5 to form a self-resetting steel tube concrete column. The self-resetting steel tube concrete column and the multi-stage energy dissipation device are connected by bolts to form a multi-stage energy dissipation self-resetting steel tube concrete column.

[0034] A further optimized solution is that the foundation component 4 includes a foundation base 4-1 for placing the rubber 3, the bottom surface of the foundation base 4-1 is fixedly connected to the foundation base plate 4-2, the steel strand anchor 1-7 is located on the bottom surface of the foundation base plate 4-2, the self-resetting prestressed steel strand 1-5 passes through the foundation base plate 4-2 and is fixedly connected to the steel strand anchor 1-7, and the second bolt 2-7 passes through the foundation base plate 4-2 and is fixedly connected to the foundation base plate 4-2.

[0035] The foundation base 4-1 is composed of concrete components, and a foundation bottom plate 4-2 is placed at the bottom of the foundation base 4-1, which prevents the steel strand anchor 1-7 from directly contacting the concrete 2, and prevents the concrete from being crushed and peeled off due to excessive relative rotation at the contact surface, thereby destroying the integrity of the structure. At the same time, it plays a role in connecting with the upper structure and can be directly manufactured in a prefabrication plant to avoid pouring a concrete foundation on site.

[0036] Under the action of earthquake, the self-resetting prestressed steel strands 1-5 first dissipate part of the earthquake energy, and the compound steel tube concrete column 1 produces moderate swing, which causes the steel plate at the connection of the compound steel tube concrete column 1 and the friction energy dissipation component 2 to start adaptive sliding, and friction energy dissipation with the friction plate, converting the vibration energy of the building into heat energy. When the earthquake action gradually increases, the rubber 3 in the foundation base 4-1 will also dissipate the earthquake energy and provide a certain damping, thereby achieving the purpose of adaptive step-by-step shock absorption and energy dissipation, and the energy dissipation device can be replaced after damage. At the same time, the unbonded prestressed tendons have self-resetting ability. Under the action of prestress, they can reduce the residual deformation of the structure and restore the precast concrete column to its original initial state after the earthquake. The unbonded prestressed tendons can also be repaired and replaced after the earthquake according to actual needs. The column foot has a good shock absorption effect under the action of frequent earthquakes, fortified earthquakes, rare earthquakes, and even extremely rare earthquakes.

[0037] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. Assembled multi-stage friction energy dissipation self-resetting column foot structure, characterized by: The invention comprises a base component (4), the top surface of the base component (4) is provided with a rubber (3), the top surface of the rubber (3) is provided with a friction energy dissipation component (2), the friction energy dissipation component (2) comprises a plurality of bottom friction plates (2-2) fixedly connected to the rubber (3) at equal intervals in the circumferential direction, a middle friction plate (2-1) is fixedly connected to the center of the top surface of the bottom friction plate (2-2), side friction plates (2-3) are respectively fixedly connected to the two sides of the middle friction plate (2-1), a composite steel tube concrete column (1) is fixedly connected between the plurality of bottom friction plates (2-2), a self-resetting prestressed steel strand (1-5) is provided inside the composite steel tube concrete column (1), the self-resetting prestressed steel strand (1-5) passes through the bottom friction plate (2-2) and is fixedly connected to the base component (4), and the composite steel tube concrete column (1) is fixedly connected to the rubber (3).

2. The assembled multi-stage friction energy dissipation self-resetting column foot structure according to claim 1 is characterized in that: The composite steel tube concrete column (1) comprises an outer steel tube (1-1) fixedly connected to the rubber (3), the outer steel tube (1-1) being fixedly connected to the middle friction plate (2-1), an inner steel tube (1-3) being arranged inside the outer steel tube (1-1), an inner stiffening rib (1-4) being fixedly connected between the outer steel tube (1-1) and the inner steel tube (1-3), a column bottom plate (1-6) being fixedly connected to the bottom surface of the outer steel tube (1-1), the column bottom plate (1-6) being fixedly connected to the rubber (3), a first through hole being arranged at the center of the column bottom plate (1-6), and concrete (1-2) being filled between the outer steel tube (1-1) and the inner steel tube (1-3).

3. The assembled multi-stage friction energy dissipation self-resetting column foot structure according to claim 2 is characterized in that: The self-resetting prestressed steel strand (1-5) is fixedly connected to the inner top surface of the inner steel pipe (1-3); the self-resetting prestressed steel strand (1-5) passes through the first through hole and is fixedly connected to a steel strand anchor (1-7); and the steel strand anchor (1-7) is fixedly connected to the foundation assembly (4).

4. The assembled multi-stage friction energy dissipation self-resetting column foot structure according to claim 3 is characterized in that: The middle friction plate (2-1) is symmetrically provided with first through slots, and the side friction plate (2-3) and the middle friction plate (2-1) are fixedly connected by a plurality of first bolts (2-6), and the first bolts (2-6) pass through the first through slots respectively.

5. The assembled multi-stage friction energy dissipation self-resetting column foot structure according to claim 4 is characterized in that: Second grooves are respectively provided on both sides of the side friction plate (2-3), and a NAO friction plate (2-4) is fixedly connected in the second groove. The NAO friction plate (2-4) and the side friction plate (2-3) are fixedly connected by the first bolt (2-6).

6. The assembled multi-stage friction energy dissipation self-resetting column foot structure according to claim 5 is characterized in that: A pressure-resistant bottom plate (2-5) is provided below the bottom friction plate (2-2), and the pressure-resistant bottom plate (2-5) is located on the bottom surface of the rubber (3). A plurality of second bolts (2-7) are provided on the bottom friction plate (2-2) and the pressure-resistant bottom plate (2-5), and the second bolts (2-7) are respectively fixedly connected to the base assembly (4).

7. The assembled multi-stage friction energy dissipation self-resetting column foot structure according to claim 6 is characterized in that: The foundation assembly (4) comprises a foundation base (4-1) for placing the rubber (3); the bottom surface of the foundation base (4-1) is fixedly connected to a foundation base plate (4-2); the steel strand anchor (1-7) is located on the bottom surface of the foundation base plate (4-2); the self-resetting prestressed steel strand (1-5) passes through the foundation base plate (4-2) and is fixedly connected to the steel strand anchor (1-7); and the second bolt (2-7) passes through the foundation base plate (4-2) and is fixedly connected to the foundation base plate (4-2).

Images