CN113322782B - Welding-free shape memory alloy double-tube shearing energy dissipation device filled with rubber - Google Patents

Welding-free shape memory alloy double-tube shearing energy dissipation device filled with rubber Download PDF

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Publication number
CN113322782B
CN113322782B CN202110597421.7A CN202110597421A CN113322782B CN 113322782 B CN113322782 B CN 113322782B CN 202110597421 A CN202110597421 A CN 202110597421A CN 113322782 B CN113322782 B CN 113322782B
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shape memory
memory alloy
thin
rigid plate
wall shape
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CN113322782A (en
Inventor
李素超
卢家辉
郭安薪
李惠
彭文昊
袁泽森
张璞
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Harbin Institute of Technology
Harbin Institute of Technology Weihai
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Harbin Institute of Technology
Harbin Institute of Technology Weihai
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • E04H9/0215—Bearing, supporting or connecting constructions specially adapted for such buildings involving active or passive dynamic mass damping systems

Abstract

The invention relates to a rubber-filled welding-free shape memory alloy double-pipe shearing energy dissipation device, which comprises an upper rigid plate, a lower rigid plate, four fixing plates and two thin-wall shape memory alloy circular pipes, wherein the two thin-wall shape memory alloy circular pipes are positioned between the upper rigid plate and the lower rigid plate, columnar high-damping rubber fillers are filled in the two thin-wall shape memory alloy circular pipes, the upper inner wall, the lower inner wall and the inner wall on one side of each thin-wall shape memory alloy circular pipe are respectively provided with a single-side variable curvature plate, the side walls of the two thin-wall shape memory alloy circular pipes are mutually and fixedly connected through bolts penetrating through the variable curvature plates, and the two sides of each pair of upper fixing plate and lower fixing plate are respectively and fixedly connected with the single-side variable curvature plate through bolts penetrating through the upper inner walls or the lower inner walls of the two thin-wall shape memory alloy circular pipes. The invention obviously reduces the damage of the damper; the device can continuously dissipate energy in larger aftershock and other earthquakes without replacement, and has excellent anti-seismic toughness.

Description

Welding-free shape memory alloy double-tube shearing energy dissipation device filled with rubber
Technical Field
The invention relates to the field of structural seismic resistance, in particular to a welding-free Shape Memory Alloy (SMA) double-pipe shearing energy dissipation device filled with rubber.
Background
The service life of urban infrastructure and civil engineering structures is as long as decades or even hundreds of years, and in the service process of the urban infrastructure and civil engineering structures, damage accumulation, resistance attenuation and even sudden accidents are inevitably generated on the structures due to the influence of adverse factors such as damage and fatigue effect caused by earthquake and wind load. At present, energy dissipation and shock absorption devices have been adopted to improve the earthquake resistance or wind resistance of large civil engineering structures and infrastructures.
The metal damper is an energy dissipation and shock absorption device commonly adopted in building structures and bridge engineering. However, in some energy dissipation and shock absorption projects, the damper needs to meet the requirement of a larger stroke, the size of the damper is often required to be increased to adapt due to the limitation of the self-deformation capacity of steel, meanwhile, the traditional metal damper needs to be welded and connected in the machining process, the problem of stress concentration is easily caused, and the low-cycle fatigue performance of the metal damper under a large-amplitude load needs to be paid sufficient attention. Therefore, the welding-free tubular metal damper with small volume and strong deformability has great application prospect.
Therefore, conventional steel metal damping remains problematic:
1) The steel metal damper has limited deformability, usually generates large residual deformation after a plurality of large-amplitude loading cycles, has obvious accumulated damage and reduced performance, and is not beneficial to playing a role in aftershock and subsequent earthquake.
2) Under the action of reciprocating load, the phenomenon of accumulated damage or stress concentration is easy to occur at the welding seam connection position of the metal damper, and the damper can be caused to lose efficacy in severe cases.
Disclosure of Invention
In order to solve the problems, the invention provides a novel welding-free shape memory alloy double-tube shearing energy dissipation device filled with rubber, which meets the self deformation and energy dissipation functions of a damper, and simultaneously further improves the out-of-plane rigidity and the viscoelasticity energy dissipation capability of a thin-wall circular tube by filling columnar rubber materials, and obviously reduces the self damage of the damper; the device can continuously dissipate energy in larger aftershocks and other earthquakes without replacement, and has excellent shock resistance and toughness.
The object of the invention is achieved as follows: a rubber-filled welding-free shape memory alloy double-pipe shearing energy dissipation device comprises an upper rigid plate, a lower rigid plate, four fixing plates and two thin-wall shape memory alloy circular pipes, wherein the upper rigid plate and the lower rigid plate are arranged in a central symmetry mode, the two thin-wall shape memory alloy circular pipes are located between the upper rigid plate and the lower rigid plate, the axial directions of the two thin-wall shape memory alloy circular pipes are perpendicular to the longitudinal direction of the upper rigid plate and the longitudinal direction of the lower rigid plate, the two thin-wall shape memory alloy circular pipes are filled with columnar high-damping rubber fillers, the upper inner wall, the lower inner wall and the inner wall of one side of each thin-wall shape memory alloy circular pipe are respectively provided with a single-side variable-curvature plate, the side walls of the two thin-wall shape memory alloy circular pipes penetrate through the variable-curvature plates through nuts and bolts and are fixedly connected with each other, two pairs of fixing plates are respectively arranged at positions corresponding to the upper plane of the upper rigid plate and the two thin-wall shape memory alloy circular pipes, the lower plane of the lower rigid plate and the two pairs of fixing plates are respectively provided with two pairs of fixing plates and the single-side variable-curvature plates through the nut and bolts and penetrate through the upper inner wall or the two thin-wall of the thin-shape memory alloy circular pipes.
The invention also has the following technical characteristics:
1. the diameter-thickness ratio of the thin-wall shape memory alloy circular tube is not less than 20, so that the plastic damage is reduced.
2. The center section of the single-side variable-curvature plate is an arc, the thickness of the center section is not less than 4 times of the thickness of the tube wall of the thin-wall shape memory alloy circular tube, and the curvature radius of the sections on the two sides is gradually reduced.
3. And flat plate type limiting plates are fixedly arranged between the two fixing plates on the upper part and on two sides of the upper part respectively, and the flat plate type limiting plates are fixedly connected with the lower rigid plate.
4. And flat plate type limiting plates are respectively arranged between the two fixing plates at the lower part and on two sides of the lower part, and the flat plate type limiting plates are fixedly connected with the lower rigid plate.
5. The upper rigid plate and the lower rigid plate are both Z-shaped.
6. The ends of the upper and lower rigid plates of the device are respectively connected with the main beam of the bridge and the bearing platform or the upper and lower ends of the interlayer support of the building structure.
The invention has the following advantages and beneficial effects: the invention adopts all mechanical connection modes, thereby avoiding welding process and welding high-temperature damage to the SMA tube. The two thin-wall shape memory alloy circular tubes and the thin-wall shape memory alloy circular tube and the rigid plate are connected by adopting a plate with a specific thickness of 'curved surface + plane', the curvature of the curved surface side is gradually changed, the circular tubes can be effectively fixed, and the deformation requirement can be met. The thin-wall shape memory alloy circular tube has excellent durability, and the device is suitable for bridge engineering, building engineering and the like with complex environmental conditions. The earthquake-resistant energy-saving wall has the advantages of strong deformability, no damage and deformation capability of 25%, full energy-consuming hysteresis loop and capability of obviously consuming energy in the earthquake process.
The thin-wall shape memory alloy circular tube material is used, the super-elastic deformation characteristic is realized, the low-cycle fatigue damage of steel under a small-amplitude displacement load is avoided, the deformation and energy consumption functions of the damper are met, and the damage of the damper is obviously reduced; the high-damping rubber material is filled in the circular tube, so that the out-of-plane rigidity and the energy consumption capability of the circular tube can be improved, the elastic performance of the rubber and the thin-wall shape memory alloy circular tube is good, the circular tube can be repeatedly used while a better damping effect is obtained, and the circular tube has remarkable anti-seismic toughness characteristic.
Drawings
Fig. 1 is a front view of the overall structure of the present invention.
Fig. 2 is a top view of the overall structure of the present invention.
FIG. 3 is a diagram of the high damping rubber column filler of the present invention.
The device comprises a rigid plate 1, a flat plate type limiting plate 2, a fixing plate 3, a bolt 4, a bolt 5, a bolt with a nut 6, a thin-wall shape memory alloy circular tube 7 and a single-side variable-curvature plate.
Detailed Description
The invention is further explained below, by way of example, with reference to the drawings in which:
example 1
Referring to fig. 1-3, a rubber-filled welding-free shape memory alloy double-tube shearing energy dissipation device comprises an upper rigid plate, a lower rigid plate, four fixing plates and two thin-wall shape memory alloy circular tubes, wherein the upper rigid plate and the lower rigid plate are arranged in a central symmetry manner, the upper rigid plate and the lower rigid plate are both Z-shaped, the two thin-wall shape memory alloy circular tubes are arranged between the upper rigid plate and the lower rigid plate, the axial directions of the two thin-wall shape memory alloy circular tubes are vertical to the longitudinal directions of the upper rigid plate and the lower rigid plate, the two thin-wall shape memory alloy circular tubes are filled with columnar high-damping rubber fillers, the upper inner wall, the lower inner wall and one side inner wall of each thin-wall shape memory alloy circular tube are respectively provided with a single-side variable-curvature plate, the side walls of the two thin-wall shape memory alloy circular tubes penetrate through the variable-curvature plates through nuts and bolts to be fixedly connected with each other, two pairs of fixing plates are respectively arranged at positions where the upper plane of the upper rigid plate corresponds to the two thin-wall shape memory alloy circular tubes, and the lower plane of the lower rigid plate respectively penetrate through the two single-wall of the upper thin-wall and the variable-wall of the thin-wall shape memory alloy circular tubes through the nuts and the two single-wall of the thin-wall. And flat plate type limiting plates are arranged between the two fixing plates on the upper part or the lower part and on two sides of the two fixing plates, bolt holes are reserved on the flat plate type limiting plates, bolt holes are also reserved on the upper rigid plate and the lower rigid plate, and the flat plate type limiting plates are fixedly connected with the upper rigid plate or the lower rigid plate through bolts.
The diameter-thickness ratio of the thin-wall shape memory alloy circular tube is not less than 20, so that plastic damage is reduced. The center section of the single-side variable-curvature plate is an arc, the thickness of the center section is not less than 4 times of the thickness of the tube wall of the thin-wall shape memory alloy circular tube, and the curvature radius of the sections on the two sides is gradually reduced.
In the embodiment, the two thin-wall shape memory alloy circular tubes and the thin-wall shape memory alloy circular tube and the rigid plate are not directly connected, but are connected with the thin-wall shape memory alloy circular tube through the single-side variable-curvature plate and the bolt with the nut, so that the connecting part can rotate a little, and the problem of stress concentration of the corresponding connecting part is avoided. Meanwhile, the damage of welding to the thin-wall shape memory alloy circular tube is avoided, so that the metal energy consumption device with large deformation and high elasticity can be obtained.
The working principle of the embodiment is as follows: the ends of two rigid plates of the device are respectively connected with a bridge girder and a bearing platform or the upper end and the lower end of an interlayer support of a building structure, when relative displacement occurs at the position of a structural connection damper due to earthquake, the thin-wall shape memory alloy circular tube is driven by the rigid plates to generate reciprocating shear deformation to form a damping force-displacement hysteresis curve, so that earthquake energy is dissipated, and the shock absorption and shock resistance effects are achieved. In the process, the flat plate type limiting plate plays a role in stably fixing the plate. In an earthquake, the damper has larger self-resetting capability due to the superelasticity characteristic of the thin-wall shape memory alloy circular tube, the low-cycle fatigue performance is reduced, the damage of the damper is obviously reduced, the damper can be repeatedly used while better anti-vibration and anti-component collision effects are obtained, the damping can be stably and effectively performed in larger aftershock or subsequent earthquakes, and the anti-vibration toughness is improved.

Claims (1)

1. A rubber-filled welding-free shape memory alloy double-pipe shearing energy dissipation device comprises an upper rigid plate, a lower rigid plate, four fixing plates and two thin-wall shape memory alloy circular pipes, and is characterized in that the upper rigid plate and the lower rigid plate are arranged in a central symmetry manner, the two thin-wall shape memory alloy circular pipes are positioned between the upper rigid plate and the lower rigid plate, the axial directions of the two thin-wall shape memory alloy circular pipes are mutually vertical to the longitudinal directions of the upper rigid plate and the lower rigid plate, columnar high-damping rubber fillers are filled in the two thin-wall shape memory alloy circular pipes, a single-side variable-curvature plate is respectively arranged on the upper inner wall, the lower inner wall and one inner wall of each thin-wall shape memory alloy circular pipe, the side walls of the two thin-wall shape memory alloy circular pipes are fixedly connected with each other by penetrating through the variable-curvature plate through nut bolts, two pairs of fixing plates are respectively arranged at positions corresponding to the upper plane of the upper rigid plate and the two thin-wall shape memory alloy circular pipes, two pairs of fixing plates are respectively arranged at the lower plane of the lower rigid plate and the corresponding to the positions of the two thin-wall shape memory alloy circular pipes, two pairs of fixing plates are respectively connected with the single-wall of the variable-curvature plate through the upper fixing plates and the two thin-wall shape memory alloy circular pipes through the nut bolts; the radius-thickness ratio of the thin-wall shape memory alloy circular tube is not less than 20, the central section of the single-side variable curvature plate is a circular arc, the thickness of the single-side variable curvature plate is not less than 4 times of the thickness of the tube wall of the thin-wall shape memory alloy circular tube, the curvature radius of the sections on two sides of the thin-wall shape memory alloy circular tube is gradually reduced, flat plate type limiting plates are fixedly arranged between the two fixing plates on the upper portion and on two sides of the upper portion respectively, the flat plate type limiting plates are fixedly connected with the lower rigid plate, the upper rigid plate and the lower rigid plate are both Z-shaped, and the end portions of the upper rigid plate and the lower rigid plate of the device are respectively connected with a main beam of the bridge and a bearing platform or the upper end and the lower end of an interlayer support of a building structure.
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