CN206298980U - Shape memory alloy spring damper - Google Patents

Abstract

The utility model discloses a shape-memory alloy spring damper, which comprises a wooden column and a wooden beam connected to the wooden column, and a rigid tie rod is connected on the opposite corner connecting the wooden column and the wooden beam, and one end of the rigid tie rod is clamped by the wooden column. The hoop mechanism is hinged on the inside of the wooden column, and the other end is connected to the spring base at the bottom of the wooden beam through a slidable support. The reciprocating motion makes the shape memory alloy spring stretch or compress, and bear the internal force between the wooden column and the wooden beam. The utility model adopts the method of node reinforcement, limits the lateral movement between floors, and significantly improves the energy consumption and self-resetting ability of the structure under the action of earthquakes, thereby solving the building tilt caused by the dynamic response caused by earthquakes, wind vibrations or mechanical vibrations , collapse and other issues, and avoid secondary correction and reinforcement of buildings after earthquakes.

Description

Shape memory alloy spring damper

technical field

The utility model relates to the field of anti-shock control and disaster prevention and mitigation of ancient wooden structures and modern wooden structures, specifically a shape-memory alloy spring damper, which meets the needs of traditional wooden ancient buildings and modern wooden structures for earthquake resistance and disaster reduction.

Background technique

Chinese ancient wooden structures have a long history and spread all over the country, containing valuable traditional construction skills and architectural culture. Existing ancient buildings include the Forbidden City in Beijing, the Wooden Pagoda in Ying County, Shanxi, the Chengde Mountain Resort, and the Dule Temple in Ji County. During the construction process of modern wooden structure, it mainly relies on the experience of ancient wooden structure, and its beam-column connection method has not undergone fundamental changes. The beam-to-column connection of wooden structures is mainly mortise and tenon joints, that is, the beam ends are made into mortise and tenon joints, and the column ends are made into mortise and tenon joints. The mortise and tenon joint has the function of combining rigidity and flexibility, and is a typical semi-rigid connection. Under the action of earthquake and wind loads, the mortise and tenon joints are squeezed and deformed, and the tenon is loosened or even pulled out, and its basic bearing capacity such as bending, shearing and torsion is weakened. This mortise-and-tenon joint construction method results in insufficient lateral stiffness of the timber frame. Under dynamic loads such as earthquakes and cross winds, the overall structure is prone to strong dynamic responses and large interstory lateral displacements, resulting in serious damage to the structure. damage or even collapse. Therefore, strengthening the mortise and tenon joints to reduce the overall dynamic response of the wooden frame and limit the lateral movement between floors is the focus of the repair and reinforcement of the wooden structure.

There are many common reinforcement methods for mortise and tenon joints in wood structures, such as L-shaped iron hoop reinforcement, U-shaped flat steel reinforcement, additional support reinforcement at joints, and fiber composite reinforcement. However, these commonly used reinforcement methods not only greatly increase the stiffness of the joints, but also greatly increase the overall stiffness of the structure, and the above reinforcement methods do not have energy dissipation capabilities or can only provide small energy dissipation capabilities. Therefore, the dynamic response of the structure under the earthquake is greatly improved, which makes the structure a huge potential safety hazard. In addition, there is a large residual deformation of the wooden frame after the earthquake, and it is difficult to automatically restore to the original state, and it still needs secondary correction and reinforcement.

With the development of science and technology, dampers are more and more widely used in the reinforcement of structures. At present, dampers based on viscoelastic materials, viscous fluids, mild steel and other materials are mostly developed and applied, but dampers made of such materials still have many shortcomings, such as easy aging of viscoelastic materials, viscous damping The re-maintenance cost of the damper is high, and the plastic residual deformation of the mild steel damper is large. In addition, the use of friction dampers for reinforcement is also a common type, which has good and reliable energy dissipation capacity, and the energy dissipation performance is less affected by the load size, loading frequency and number of loading cycles, but the friction energy dissipation of friction dampers After that, there is a large residual deformation, which cannot be self-resetting. Therefore, it is necessary to develop a new type of damper, which should not only have good energy dissipation capacity, but also have the ability to automatically return to the original state after deformation, so that replacement of the damper and secondary reinforcement after the earthquake can be eliminated. Bring huge cost, and has good engineering application prospect.

Shape memory alloy is an ideal material for the development of the above-mentioned target damper. Shape memory alloy is a new type of functional material with a variety of special mechanical properties. It has significant shape memory effect, phase transition superelasticity and high damping characteristics. Compared with other materials, the shape memory alloy has good fatigue resistance and large recoverable strain (6%-8%). Therefore, compared with other types of dampers, the damper based on shape memory alloy has the characteristics of automatic recovery of deformation and high damping energy dissipation capacity, which is to reduce the damage of building structures under the action of earthquakes and reduce the damage caused by earthquakes. An effective solution for repairing the structure itself or repairing or replacing dampers after minor earthquakes.

Utility model content

In order to solve the above defects in the prior art, the purpose of this utility model is to provide a shape memory alloy spring damper, the purpose of which is to overcome the defects and deficiencies in the above background technology, and adopt the method of node reinforcement to limit the interlayer side It can significantly improve the energy consumption and self-resetting ability of the structure under the earthquake, so as to solve the problems of building tilt and collapse caused by the dynamic response of earthquake, wind vibration or mechanical vibration, and avoid the secondary damage of the building after the earthquake. Secondary correction reinforcement.

The utility model is achieved through the following technical solutions.

The shape memory alloy spring damper includes a wooden column and a wooden beam connected to the wooden column. A rigid tie rod is connected to the corner where the wooden column and the wooden beam are connected. One end of the rigid tie rod is hinged on the inside of the wooden column through a wooden column clamp mechanism. The other end is connected to the spring base at the bottom of the wooden beam through a slidable support. The shape memory alloy spring is sleeved on the sliding round shaft of the spring base. The rigid tie rod drives the reciprocating movement of the slidable support, so that the shape memory alloy spring Occurs in tension or compression, bearing internal forces between wooden columns and wooden beams.

Further, the wooden column clamp mechanism includes a wooden column clamp, and the wooden column clamp is fixed on the surrounding wall of the wooden column. A vertical connecting steel plate is arranged on the wooden column clamp inside the wooden column, and the hinge support is fixed on the wooden column by welding. The steel plate is vertically connected, and the lower end of the rigid tie rod is connected to the hinge support.

Further, the spring base is connected to the wooden beam clamp, and the wooden beam clamp is fixed on the surrounding wall of the wooden beam. The spring base is a frame plate structure, and the bottom frame plate is close to the bottom surface of the wooden beam, and the sliding support Attached to spring base.

Further, a pair of parallel sliding circular shafts are arranged on the spring base, and the two sliding circular shafts are respectively covered with a pair of slidable bearings composed of slidable rings connected to each other through the circular shafts. The two ends of the ring are respectively connected with shape memory alloy springs; the upper end of the rigid tie rod is hinged with the circular shaft of the slidable ring.

Further, the shape memory alloy spring connected to both ends of the slidable ring has four segments, which are evenly arranged on the sliding circular shaft, one end of which is connected to the steel plate at the end of the spring base, and the other end is connected to the sliding ring.

Further, the two ends of the rigid tie rod are respectively provided with double connecting rings, the double connecting ring at one end of the rigid tie rod clamps the hinge ring on the hinge support, and the other end is connected to the two slidable rings on the slidable support. on the axis between them.

Further, the wooden column clamp and the wooden beam clamp are both composed of a frame plate connected to a rectangular plate, and the connection ends are connected by bolts or slots.

Effects and advantages of the utility model: the utility model increases the rigidity of the nodes after reinforcement, and the shape memory alloy spring directly bears the internal force; it can dissipate a large amount of seismic energy, and the damper plays an energy-dissipating role. Utilizing the self-resetting of the shape memory alloy spring, there is no residual characteristic after deformation. The reinforced wood structure mortise and tenon joints have significantly improved shear and flexural bearing capacity, and can be restored after an earthquake without residual deformation. The joints after strengthening The improved seismic performance enables the entire structure to be optimized for seismic performance.

The utility model has good durability, corrosion resistance and fatigue resistance. Clamps are used to connect the damper to the wooden structure without using wooden nails or wood screws, which will not cause any damage to the original structure, and achieve the repair and reinforcement principle of repairing the old and maintaining the original structure.

Description of drawings

Fig. 1 is a schematic diagram of a shape memory alloy spring damper;

Figure 2 is a schematic diagram of the base and its attached parts;

Fig. 3 (a) is the schematic diagram of base; Fig. 3 (b) is the schematic diagram of slidable support;

Figure 4(a) and Figure 4(b) are the front view and left side view of the rigid tie bar respectively;

Figure 5(a), Figure 5(b) and Figure 5(c) are the front view, right view and top view of the hinge support respectively;

Figure 6(a), Figure 6(b) and Figure 6(c) are the front view, left view and top view of the clamp respectively.

In the figure: 1. Wooden column; 2. Wooden beam; 3. Spring base; 4. Shape memory alloy spring; 5. Slidable support; 6. Rigid tie rod; 7. Hinged support; 8. Wooden post hoop; 9, wooden beam clamp; 10, vertically connected steel plate; 11, sliding circular shaft.

detailed description

The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments, but it is not used as a basis for any limitation on the utility model.

As shown in Figure 1, the shape memory alloy spring damper of the utility model comprises a wooden column 1 and a wooden beam 2 connected to the wooden column 1, and a rigid tie rod 6 is connected on the corner where the wooden column 1 and the wooden beam 2 are connected. One end of the tie rod 6 is hinged to the inside of the wooden column 1 through the wooden column clamp mechanism, and the other end is connected to the spring base 3 at the bottom of the wooden beam 2 through the slidable support 5, and the shape memory alloy spring 4 is sleeved on the spring base 3. On the sliding round shaft 11, the rigid tie rod 6 drives the reciprocating motion of the slidable support 5, so that the shape memory alloy spring 4 is stretched or compressed, and bears the internal force between the wooden column 1 and the wooden beam 2.

Wherein, the wooden column clamp mechanism includes a wooden column clamp 8, and the wooden column clamp 8 is fixed on the wall of the wooden column 1, and the wooden column clamp 8 inside the wooden column 1 is provided with a vertical connecting steel plate 10, and a hinge support 7 is fixed on the vertical connecting steel plate 10 by welding, and the lower end of the rigid tie rod 6 is connected on the hinge support 7 .

The spring base 3 is connected to the wooden beam clamp 9, and the wooden beam clamp 9 is fixed on the wall around the wooden beam 2. The spring base 3 is a frame plate structure, and the bottom frame plate is close to the bottom surface of the wooden beam 2 and can slide The support 5 is connected to the spring base 3 . A pair of parallel sliding circular shafts 11 are connected to the bottom spring base 3 of the wooden beam 2, as shown in Fig. 2, Fig. 3(a) and Fig. 3(b). The slidable circular ring connected by the sliding circular shaft 11, the two circular rings are fixedly connected together by the circular shaft, the circular ring in the middle of the sliding circular shaft and the fixed circular shaft between the circular rings together form the slidable support 5; The two ends of the ring are respectively connected with a shape memory alloy spring 4, the shape memory alloy spring 4 has four sections, which are evenly arranged on the sliding circular shaft, that is, each side of the ring has a section of shape memory alloy spring 4, and the shape memory alloy spring 4 One end is connected to the steel plate at the end of the spring base 3, and the other end is connected to the sliding ring; the lower end of the rigid tie rod 6 is connected to the hinge support 7 welded and fixed on the vertical connecting steel plate 10, and the upper end is connected to the middle of the slidable support 5 The circular shaft hinge of the slidable ring.

Figure 4(a) and Figure 4(b) respectively show the front view and left view of the rigid tie bar, and Figure 5(a), Figure 5(b) and Figure 5(c) respectively show the front view of the hinge support , right and top views. The two ends of the rigid tie rod 6 are respectively provided with double connecting rings, the double connecting rings at one end of the rigid tie rod 6 clamp the hinge ring on the hinge support 7, and the other end is connected between the two slidable rings on the spring base 3. on the circular axis between them.

Figure 6(a), Figure 6(b) and Figure 6(c) are the front view, left view and top view of the clamp respectively. Both the wooden column clamp 8 and the wooden beam clamp 9 are composed of a frame plate connected to a rectangular plate, and the connection ends are connected by bolts or slots, that is, a protruding pin is provided at the end of the frame plate, and the rectangular plate The corresponding end of the board is provided with a card slot for docking.

During a small earthquake, the node rotation is very small, and the stiffness of the reinforced node increases, and the internal force is directly borne by the shape memory alloy spring; during a large earthquake, the node rotates reciprocally, which drives the shape memory alloy spring to repeatedly stretch or compress, dissipating a large amount of earthquakes energy, the damper starts to dissipate energy. Utilizing the self-resetting of the shape memory alloy spring, there is no residual characteristic after deformation. The reinforced wood structure mortise and tenon joints have significantly improved shear and flexural bearing capacity, and can be restored after an earthquake without residual deformation. The joints after strengthening The improved seismic performance enables the entire structure to be optimized for seismic performance.

The utility model is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the utility model, those skilled in the art can make some technical features based on the disclosed technical content without creative work. Replacement and deformation, these replacements and deformations are all within the protection scope of the present utility model.

Claims (7)

1. A shape memory alloy spring damper, comprising a wooden post (1) and a wooden beam (2) connecting the wooden post (1), characterized in that it is connected at the corner where the wooden post (1) and the wooden beam (2) are connected There is a rigid tie rod (6), one end of the rigid tie rod (6) is hinged to the inside of the wooden column (1) through a wooden column clamp mechanism, and the other end is connected to the spring at the bottom of the wooden beam (2) through a slidable support (5) On the base (3), the shape memory alloy spring (4) is sleeved on the sliding circular shaft (11) of the spring base (3), and the rigid tie rod (6) drives the reciprocating motion of the slidable support (5), so that The shape memory alloy spring (4) is stretched or compressed to bear the internal force between the wooden post (1) and the wooden beam (2). 2. The shape memory alloy spring damper according to claim 1, characterized in that: the wooden column clamp mechanism comprises a wooden column clamp (8), and the wooden column clamp (8) is fixed on the wooden column (1) On the peripheral wall, a vertical connecting steel plate (10) is arranged on the wooden column clamp (8) inside the wooden column (1), and the hinge support (7) is fixed on the vertical connecting steel plate (10) by welding, and the rigid system The lower end of the rod (6) is connected to the hinge support (7). 3. The shape memory alloy spring damper according to claim 2, characterized in that: the spring base (3) is connected to the wooden beam clamp (9), and the wooden beam clamp (9) is fixed on the wooden beam (2) on the peripheral wall, the spring base (3) is a frame plate structure, and its bottom frame plate is close to the bottom surface of the wooden beam (2), and the slidable support (5) is connected on the spring base (3). 4. The shape memory alloy spring damper according to claim 3, characterized in that: a pair of parallel distributed sliding circular shafts (11) are arranged on the spring base (3), and the two sliding circular shafts are respectively A pair of slidable supports (5) composed of slidable rings connected to each other through circular shafts are sleeved, and shape-memory alloy springs (4) are respectively connected to the two ends of the slidable rings; the upper end of the rigid tie rod (6) is connected to the Circular axis hinge with slidable ring. 5. The shape-memory alloy spring damper according to claim 4, characterized in that: the shape-memory alloy springs (4) connected to the two ends of the slidable ring have four sections, which are evenly arranged on the sliding circular shaft, and one end is connected to the The steel plate at the end of the spring base (3) is connected, and the other end is connected with the sliding ring. 6. The shape memory alloy spring damper according to claim 4, characterized in that: the two ends of the rigid tie rod (6) are respectively provided with double connecting rings, and the double connecting rings at one end of the rigid tie rod (6) clamp The hinge ring on the hinge support (7), the other end is connected on the circular shaft between two slidable rings on the slidable support (5). 7. The shape memory alloy spring damper according to claim 3, characterized in that: the wooden column clamp (8) and the wooden beam clamp (9) are formed by connecting a frame plate to a rectangular plate, and connecting The ends are connected by bolts or slots.