Anti-seismic recoverable swing column

Abstract

The utility model discloses a recoverable swing column for shock resistance, relates to the technical field of shock resistance of constructional engineering, and adopts the technical scheme that the recoverable swing column comprises a stand column, two energy consumption dampers and a rotatable column foot, each energy consumption damper comprises a clamping plate, a bottom connecting piece, a top connecting piece, an SMA energy consumption metal rod, a friction plate and a fastener, the energy dissipation damper is connected with the stand column through the top connecting piece, one end of the clamping plate is connected with the top connecting piece through a fastener, the other end of the clamping plate is connected with the bottom connecting piece through a fastener, and the number of the friction plates is two. Rotation constraint of a connecting interface of the main body structure and the foundation slab is relaxed through the energy dissipation dampers and the rotatable column feet, so that the structure rotates and rubs in a limited mode to dissipate earthquake energy, the energy dissipation dampers generate up-down sliding friction to dissipate the earthquake energy, and damage and residual deformation of the main body structure are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of earthquake resistance in construction engineering, and particularly relates to a swing column for earthquake resistance and recoverability. Background Technique

[0002] Shape memory alloy (SMA) is a material composed of more than two metal elements that has a shape memory effect through thermoelasticity and martensitic phase transformation and its inverse transformation. Shape memory alloy is the material with the best shape memory performance among shape memory materials. Generally, shape memory alloy only needs to be heated, and it can naturally unfold and return to its original shape due to its "memory" function.

[0003] The swing structure refers to relaxing the vertical or rotational constraints at the connection interface between some main structures and the foundation, so that the structure dissipates seismic energy through vertical uplift or limited rotation; or making the lateral deformation of the structure floor tend to be uniform by using the rigid body rotation of additional swing members to reduce the residual deformation. The types of swing structures include swing wall structures, swing column structures, swing trusses, and combined swing structures with various replaceable energy dissipation devices and self-centering devices.

[0004] The harm caused by earthquakes is extremely serious, and the damage to buildings is even immeasurable. The collapse of buildings is basically caused by the damage of vertical components. The design of the column bottom plays a crucial role in the seismic performance of the overall structure. When encountering strong earthquake effects, frame columns usually suffer serious damage. The traditional seismic design idea of frame columns is to enhance the strength and stiffness of the structure through effective seismic measures or avoid brittle failure or collapse of the structure through the ductility of the structure or components. However, the energy dissipation of this structural system still mainly depends on the main structure. After the earthquake, plastic hinges will appear at the bottom of the frame column, resulting in plastic damage and residual deformation, and the seismic performance is difficult to recover to the normal state. It requires a large cost to repair or even can only be demolished and rebuilt, thus seriously affecting the use function of the building structure and causing huge economic losses. Content of the Utility Model

[0005] In order to achieve the above-mentioned utility model purpose and address the above technical problems, the utility model provides a swing column for earthquake resistance and recoverability.

[0006] Its technical solution includes a column, an energy-dissipating damper, and a rotatable column base. There are two energy-dissipating dampers, and each energy-dissipating damper includes a splint, a bottom connector, a top connector, an SMA energy-dissipating metal bar, a friction plate, and a fastener. The upper end of the energy-dissipating damper is connected to the column through the top connector, and the lower end of the energy-dissipating damper is connected to the foundation bottom plate through the bottom connector. One end of the splint is connected to the top connector through the fastener, and the other end of the splint is connected to the bottom connector through the fastener. There are two friction plates, and the two friction plates are connected to both sides of the splint through the SMA energy-dissipating metal bar.

[0007] Preferably, SMA energy-dissipating metal sheets are provided at both ends of the SMA energy-dissipating metal bar, and the SMA energy-dissipating metal bar is made of shape memory metal SMA.

[0008] Preferably, a plurality of grooves are provided on the friction plate. Both ends of the SMA energy-dissipating metal bar are respectively inserted into the grooves of the two friction plates, and the SMA energy-dissipating metal sheets are stuck outside. Arc-shaped depressions recessed towards the splint are also provided on both sides of the grooves on the friction plate.

[0009] Preferably, the column is a square steel pipe column. Bottom plates are fixedly connected to both sides of the bottom of the column, and gussets are fixedly connected between the upper surface of the bottom plate and the side wall of the column.

[0010] Preferably, the top connector is a U-shaped connector. The top connector is provided with double ear plates. The upper end of the top connector is bolted to the bottom plate, and the splint is connected to the double ear plates through the fastener.

[0011] Preferably, the bottom connector is a T-shaped connector. The bottom connector is provided with a single ear plate, and the fastener connects the two friction plates to the single ear plate.

[0012] Preferably, the fastener is a high-strength bolt.

[0013] Preferably, the rotatable column base includes column base ear plates, suspension plates, and fixing plates. There are two groups of column base ear plates and two groups of suspension plates respectively. The two groups of column base ear plates and the two groups of suspension plates are connected through the fastener, and the fixing plate is welded to the two groups of column base ear plates.

[0014] Preferably, the column and the rotatable column base are both made of Q355B steel. The friction plate, splint, bottom connector, and top connector are made of Q235B steel, and the fastener is a 10.9-grade high-strength bolt.

[0015] The beneficial effects brought by the technical solution provided by the embodiment of the present invention are:

[0016] 1. By using energy-dissipating dampers and rotatable column bases to relax the rotational constraint at the connection interface between the main structure and the foundation slab, the structure dissipates seismic energy through finite rotation and friction. The energy-dissipating dampers undergo up-and-down sliding friction to dissipate seismic energy, reducing the damage and residual deformation of the main structure.

[0017] 2. The SMA energy-dissipating metal rods in the energy-dissipating dampers play the role of "damage fuses", enabling replacement after damage. At the same time, the structure can be reset after an earthquake, meeting the seismic requirements for recoverability. After an earthquake, by utilizing the replaceable function of the SMA energy-dissipating metal rods, only by restoring the SMA energy-dissipating metal rods to their original shape, they can be reused, thus greatly reducing the economic losses caused by traditional seismic measures and saving resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0019] Figure 2 It is an exploded structural schematic diagram of the energy-dissipating damper of an embodiment of the present utility model.

[0020] Figure 3 It is a front view of the structure of the energy-dissipating damper of an embodiment of the present utility model.

[0021] Figure 4 It is a schematic diagram of the structure of the rotatable column base of an embodiment of the present utility model.

[0022] Among them, the reference numerals are: 1. Column; 101. Corner brace; 102. Base plate; 2. Energy-dissipating damper; 201. Splint; 202. Bottom connecting piece; 203. Top connecting piece; 204. Friction plate; 2041. Arc-shaped depression; 2042. Groove; 205. Fastener; 206. SMA energy-dissipating metal rod; 2061. Energy-dissipating metal sheet; 3. Rotatable column base; 301. Column base ear plate; 302. Hanging plate; 303. Column base ear plate; 4. Foundation slab. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. Of course, the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] It should be noted that, without conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0025] In the description of the creation of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the creation of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the creation of the present utility model. In addition, terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the creation of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0026] In the description of the creation of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the creation of the present utility model can be understood through specific circumstances.

[0027] Embodiment

[0028] See Figures 1 to 4 , the present utility model provides a seismic recoverable rocking column, including a column 1, energy dissipation dampers 2, and a rotatable column base 3. There are two energy dissipation dampers 2, and each energy dissipation damper 2 includes a splint 201, a bottom connector 202, a top connector 203, an SMA energy dissipation metal bar 206, a friction plate 204, and a fastener 205. The upper end of the energy dissipation damper 2 is connected to the column 1 through the top connector 203, and the lower end of the energy dissipation damper 2 is connected to the foundation base plate 4 through the bottom connector 202. One end of the splint 201 is connected to the top connector 203 through the fastener 205, and the other end of the splint 201 is connected to the bottom connector 202 through the fastener 205. There are two friction plates 204, and the two friction plates 204 are connected to both sides of the splint 201 through the SMA energy dissipation metal bar 206.

[0029] Specifically, SMA energy dissipation metal sheets 2061 are provided at both ends of the SMA energy dissipation metal bar 206, and the SMA energy dissipation metal bar 206 is made of shape memory metal SMA.

[0030] Specifically, a plurality of grooves 2042 are provided on the friction plate. The two ends of the SMA energy-dissipating metal rod 206 are respectively inserted into the grooves 2042 of the two friction plates 204 and the splint. The SMA energy-dissipating metal sheet 2061 is stuck outside the grooves 2042. On both sides of the grooves 2042 on the friction plate, arc-shaped depressions 2041 recessed towards the splint 201 are provided.

[0031] Specifically, the column 1 is a square steel pipe column. On both sides of the bottom of the column 1, the side walls are fixedly connected with bottom plates 102. Between the surface of the bottom plate 102 and the side wall of the column 1, gussets 101 are fixedly connected.

[0032] Specifically, the top connector 203 is a U-shaped connector. The top connector 203 is provided with double ear plates. The upper end of the top connector is bolted to the bottom plate 102. The splint 201 is connected to the double ear plates through fasteners.

[0033] Specifically, the bottom connector 202 is a T-shaped connector. The bottom connector 202 is provided with a single ear plate. The fasteners 205 connect the two friction plates 204 to the single ear plate.

[0034] Specifically, the fasteners 205 are high-strength bolts.

[0035] Specifically, the rotatable column base 3 includes column base ear plates 301, hanging plates 302, and fixing plates 303. Two groups of column base ear plates 301 and two groups of the hanging plates 302 are correspondingly provided. The two groups of column base ear plates 301 and the two groups of the hanging plates 302 are connected through the fasteners 205. The fixing plate 303 is welded to the two groups of column base ear plates 301.

[0036] Specifically, the column 1 and the rotatable column base 3 are both made of Q355B steel. The friction plates 204, the splints 201, the bottom connectors 202, and the top connectors 203 are made of Q235B steel. The fasteners 205 are 10.9-grade high-strength bolts.

[0037] When the utility model is in use, during an earthquake, the rocking column relaxes the rotational constraint of the connection interface between the main structure and the foundation bottom plate 4 through the energy-dissipating damper 2. The energy-dissipating damper 2 undergoes up-and-down sliding friction to dissipate seismic energy. And the shape memory alloy (SMA) damper plays a self-resetting role to reset the structure, ensuring that the main structure is in an elastic state or slightly plastic deformation, reducing the damage and residual deformation of the main structure. After the earthquake, only the locally damaged components of the SMA energy-dissipating damper need to be replaced to enable the structure to resume its service function, achieving replaceability after damage and meeting the seismic requirements of structural recoverability.

[0038] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A seismic restorable rocking column, characterized in that: The utility model comprises a column (1), two energy dissipation dampers (2), and a rotatable column foot (3), wherein the energy dissipation dampers (2) are symmetrically arranged on both sides of the column (1), and the energy dissipation dampers (2) comprise a clamping plate (201), a bottom connecting piece (202), a top connecting piece (203), an SMA energy dissipation metal rod (206), a friction plate (204), and a fastener (205), wherein the upper end of the energy dissipation damper (2) is connected to the column (1) via the top connecting piece (203), and the energy dissipation damper (2) is connected to the column (1) via the top connecting piece (203). The lower end of the energy damper (2) is connected to the base bottom plate (4) via a bottom connecting piece (202), one end of the clamping plate (201) is connected to the top connecting piece (203) via a fastener (205), and the other end of the clamping plate (201) is connected to the bottom connecting piece (202) via a fastener (205), and two friction plates (204) are provided, and the two friction plates (204) are connected to both sides of the clamping plate (201) via SMA energy-absorbing metal rods (206).

2. A seismic-resistant and restorable rocking column according to claim 1, characterized in that: SMA energy-absorbing metal sheets (2061) are provided at both ends of the SMA energy-absorbing metal rod (206), and the SMA energy-absorbing metal rod (206) is made of shape memory metal SMA.

3. A seismic-resistant and restorable rocking column according to claim 2, characterized in that: The friction plate (204) is provided with a plurality of grooves (2042); the two ends of the SMA energy-absorbing metal rod (206) are respectively inserted into the grooves (2042) of the two friction plates (204); the SMA energy-absorbing metal sheet (2061) is clamped outside the grooves (2042); and the friction plate (204) is further provided with arc-shaped depressions (2041) on both sides of the grooves (2042) that are recessed in the direction of the clamping plate (201).

4. The seismic-resistant and restorable rocking column according to claim 1, characterized in that: The column (1) is a square steel pipe column, and a bottom plate (102) is fixedly connected to the side walls on both sides of the bottom of the column (1), and a corner brace (101) is fixedly connected between the upper surface of the bottom plate (102) and the side wall of the column (1).

5. A seismic-resistant and restorable rocking column according to claim 4, characterized in that: The top connecting member (203) is a U-shaped connecting member, and the top connecting member (203) is provided with a double-ear plate. The upper end of the top connecting member (203) is connected to the bottom plate (102) via bolts, and the double-ear plate is connected to the clamping plate (201) via fasteners.

6. The seismic-resistant and restorable rocking column according to claim 1, characterized in that: The fastener (205) is a high-strength bolt.

7. The seismic-resistant and restorable rocking column according to claim 1, characterized in that: The upright column (1) and the rotatable column foot (3) are both made of Q355B steel, the friction plate (204), the clamping plate (201), the bottom connecting piece (202), and the top connecting piece (203) are made of Q235B steel, and the fastener (205) is made of 10.9 grade high-strength bolts.

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