CN209429306U - A replaceable two-way composite energy-dissipating mild steel damper - Google Patents

Abstract

The utility model belongs to civil engineering seismic resistance field and field of shock absorption, is related to a kind of replaceable two-way compound energy consumption mild steel damper, bottom plate is connect by the high-strength bolt in vertical bolt hole with built-in fitting in shear wall toe of wall thereon；Hollow steel pipe and upper head plate lower surface axis connection；Energy dissipation spring is placed in hollow steel drum internal cavity；Energy consumption rubber is placed in hollow steel drum internal cavity bottom；Hollow steel drum bottom and the welding of bottom plate upper surface；Mild steel steel disc and upper and lower end plate weld, and are connected with each other between upper and lower mild steel steel disc by the high-strength bolt in strip bolt hole.The damper of the utility model is at shear wall toe of wall, there is better damping energy consumption effect than conventional damper, and the damper is acted in vertical direction by tension and compression, horizontal direction is by shear action, multidirectional energy consumption may be implemented, damping effect than traditional unidirectional energy-consumption damper is more excellent, and by the replacement after shake to damper, can make the fast quick-recovery normal use of structure.

Description

A replaceable two-way composite energy-dissipating mild steel damper

technical field

The utility model belongs to the field of anti-seismic and shock-absorbing civil engineering, and mainly relates to a metal energy-dissipating damper in a structural anti-seismic control system, in particular to a replaceable two-way composite energy-dissipating mild steel that can be used at the toe of a shear wall damper.

Background technique

The metal damper, especially the mild steel damper, is a kind of shock-absorbing and shock-isolating component that yields and consumes energy. Because the metal has good hysteresis characteristics after entering the plastic state, and absorbs a large amount of energy during the elastic-plastic deformation process, it is used. To manufacture energy-dissipating shock absorbers of different types and configurations. From the force form, it can be divided into axial yield type, shear yield type, bending yield type and torsional yield type damper. The existing energy dissipation dampers are as follows: X-shaped and triangular energy dissipation, torsional Beam energy dissipation device, bending beam energy dissipation device, U-shaped steel plate energy dissipation device, steel bar energy dissipation device, circular energy dissipation device, double circular ring energy dissipation device, stiffened circular ring energy dissipation device, etc. Compared with other types of dampers such as viscoelastic, friction, and viscous liquid, metal dampers are easy to process, have stable hysteresis performance, are easy to replace, and have low cost and maintenance costs, so they are widely used in earthquake resistance of engineering structures. Reinforcement and repair areas.

With the construction of super high-rise buildings one after another, it cannot be ignored that such super high-rise buildings are subjected to excessive structural vibration under the action of earthquakes, which affects daily use, and even causes structural damage, posing a threat to people's lives. Therefore, , reducing the amplitude of large structures has become a problem to be solved. The damper is a device that provides vibration damping to reduce vibration energy. It has been widely used in engineering practice. However, due to technical reasons, most of the dampers currently used in building structures consume energy in one direction, which greatly limits their performance. The effect of actual energy consumption and shock absorption.

At present, the shear wall structure in the actual project is seriously damaged under the action of the earthquake. Although the shear wall structure will not collapse as a whole, it is difficult to carry out post-earthquake repair work. Therefore, the shock absorption of the shear wall It is necessary to propose seismic isolation. The current practice is to install dampers at the toe of the shear wall, which has achieved the effect of shock absorption and isolation. However, the effect of current dampers is not obvious, and it is not easy to replace.

Contents of the invention

The purpose of this utility model is to overcome the shortcomings of the above-mentioned prior art, and propose a replaceable two-way composite energy-dissipating mild steel damper. The problem that the plastic strain concentration area at the toe is prone to damage makes the parent wall mainly bear elastic deformation, while the plastic deformation area is borne by the damper. The damper can realize two-way composite energy consumption, and it is easy to replace after damage, which can make the structure fast. Return to normal use.

In order to achieve the above object, the utility model adopts the following technical solutions:

A replaceable two-way composite energy-dissipating mild steel damper, including an upper end plate and a lower end plate, the upper end plate and the lower end plate are set up and down opposite each other, and a number of hollow steel barrels are symmetrically fixed on the lower end plate, and the hollow steel barrels are arranged sequentially from bottom to top Equipped with energy-dissipating rubber and energy-dissipating springs; the lower surface of the upper end plate is directly above each hollow steel drum with a hollow steel pipe connected to the shaft, and the lower end of the hollow steel pipe is fixedly connected with a hollow ball. The upper ends of the springs are against each other;

A plurality of first mild steel sheets are fixedly connected to the lower end plate, and the plurality of first mild steel sheets are symmetrically distributed around the periphery of all hollow steel drums;

The lower surface of the upper end plate is fixedly connected with a second mild steel sheet at a position corresponding to each first mild steel sheet, and the upper end of the first mild steel sheet and the lower end of the second mild steel sheet are fixedly connected with a lower end respectively. The connecting end plate is connected to the upper connecting end plate, and the lower connecting end plate is opposed to the upper connecting end plate and fixedly connected by bolts.

The holes for bolts passing through the lower connecting end plate and the upper connecting end plate are elongated bolt holes, and all elongated bolt holes are parallel to each other.

The rotating shafts of all the hollow steel pipes are parallel, and the rotating surfaces of the hollow steel pipes are parallel to the length direction of the elongated bolt holes.

The energy-dissipating rubber is superplastic silicone rubber.

The energy dissipation spring is made of SMA shape memory alloy.

Two-thirds of the hollow ball is in the hollow steel drum.

Both the first mild steel sheet and the second mild steel sheet are made of mild steel with a yield strength of 90MPa-190MPa, and the upper end plate and lower end plate, hollow steel drum, hollow ball and hollow steel pipe are all made of steel with a yield strength of 235MPa.

The welding between the lower end plate and the hollow steel drum, the welding between the hollow steel pipe and the hollow ball, the welding between the lower end plate and the first mild steel sheet, the welding between the upper end plate and the second mild steel sheet, and the welding between the first mild steel sheet The steel sheet is welded with the lower connecting end plate, and the upper connecting end plate of the second soft steel sheet is welded.

The utility model has the following beneficial effects:

The energy-dissipating part of the replaceable two-way composite energy-dissipating mild steel damper of the utility model is mainly composed of three parts. The first part is rubber energy-dissipating part, which has the effect of cushioning and shock absorption when the upper and lower end plates of the damper are pressed. The second part is the energy dissipation of the spring, which absorbs the seismic energy through the deformation of the spring when the damper is compressed. The third part is the friction and friction energy consumption of the mild steel sheet to bear the shear damage of the shear wall. At the same time, the lower surface of the upper end plate is axially connected to the hollow steel pipe directly above each hollow steel drum, and the lower end of the hollow steel pipe is fixedly connected to the hollow ball. The shaft connection point of the steel pipe is the center, and it moves horizontally in the plane parallel to the mild steel sheet to realize the cooperative work with the mild steel sheet. The damper of the utility model can utilize the combination of rubber, mild steel sheet and spring to dissipate energy, so that it has good energy dissipating capacity both in the vertical direction and in the horizontal direction. When the damper of the present invention is applied to the anti-seismic shear wall, bolt holes are opened on the upper and lower end plates of the present invention, placed at the toe of the shear wall, that is, the plastic area, and fixedly connected to the At the toe of the wall, the connection is stable, which can achieve the purpose of quick replacement after the earthquake. The damper is subjected to tension and compression in the vertical direction and shearing in the horizontal direction, which can realize multi-directional energy consumption. Therefore, the reduction of the damper The seismic effect is good, which solves the problem that the plastic strain concentration area at the toe of the shear wall is prone to damage under the horizontal earthquake load, so that the parent wall mainly bears elastic deformation, while the plastic deformation area is borne by the damper. The damper can It realizes two-way composite energy consumption, and is easy to replace after damage, which can quickly restore the structure to normal use, greatly improving the ability of the building to restore use after an earthquake, and its economy and practicability are stronger.

Description of drawings

Fig. 1 is a schematic diagram of the damper of the present invention applied to the toe of a shear wall.

Fig. 2 is a schematic diagram of the replaceable two-way composite energy-dissipating mild steel damper of the present invention.

Fig. 3 is a cross-sectional view of the replaceable two-way composite energy-dissipating mild steel damper of the present invention.

Fig. 4 is a side view of the replaceable two-way composite energy-dissipating mild steel damper of the present invention.

Fig. 5 is a component separation diagram of the replaceable two-way composite energy-dissipating mild steel damper of the present invention.

The meanings of each label in the figure are: 1-upper end plate, 2-lower end plate, 3-mild steel sheet, 4-hollow steel barrel, 5-energy-dissipating rubber, 6-energy-dissipating spring, 7-hollow ball, 8 - hollow steel pipe, 9 - shear wall.

Detailed ways

Comply with above-mentioned technical scheme, provide the concrete example of the present utility model below, it should be noted that the utility model is not limited to the following concrete examples, all equivalent transformations done on the basis of the technical scheme of the present application all fall into the protection of the present utility model scope.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figures 2 to 5, the replaceable two-way composite energy-dissipating mild steel damper of the present invention includes an upper end plate 1 and a lower end plate 2, the upper end plate 1 and the lower end plate 2 are set up and down opposite each other, and the upper end plate 1 and the lower end plate The plates 2 are provided with bolt holes that can be connected to the pre-embedded bolts at the toe of the wall; the lower end plate 2 is symmetrically welded with four hollow steel barrels 4, and the four hollow steel barrels 4 are symmetrically arranged at the four corners of the upper surface of the lower end plate 2 , the bottom of the hollow steel drum 4 is welded to the upper surface of the lower end plate 2; each hollow steel drum 4 is provided with energy-dissipating rubber 5 and energy-dissipating spring 6 sequentially from bottom to top; the energy-dissipating rubber 5 is placed at the inner bottom of the hollow steel drum 4; The energy-dissipating spring 6 is placed on the upper surface of the energy-dissipating rubber 5; the lower surface of the upper end plate 1 is axially connected with a hollow steel pipe 8 directly above each hollow steel barrel 4, and the upper end plate 1 passes through the high-strength bolts in the horizontal bolt holes and the hollow steel pipe 8-axis connection, the lower end of the hollow steel pipe 8 is welded with a hollow ball 7, the spherical surface of the lower part of the hollow ball 7 is offset against the upper end of the energy dissipation spring 6 and is in free contact with the energy dissipation spring 6; the lower end plate 2 is welded with 4 first Mild steel sheets, four first mild steel sheets are distributed symmetrically around the periphery of all hollow steel drums 4; the lower surface of the upper end plate 1 is welded with a second mild steel sheet at a position corresponding to each first mild steel sheet The upper end of the first mild steel sheet and the lower end of the second mild steel sheet are respectively welded with a lower connection end plate and an upper connection end plate, the lower connection end plate and the upper connection end plate are offset and connected by bolts, and the lower connection The holes for the bolts to pass through on the end plate and the upper connecting end plate are elongated bolt holes, and all elongated bolt holes are parallel to each other. The rotating shafts of all the hollow steel pipes (8) are parallel, and the rotating surfaces of the hollow steel pipes (8) are parallel to the length direction of the elongated bolt holes. The hollow steel pipe 8 is axially connected with the lower surface of the upper end plate 1 to ensure that the assembly formed by the hollow ball 7 and the hollow steel pipe 8 can move horizontally together with the mild steel sheet 3 in the hollow steel drum 4 . 2/3 of the hollow ball 7 is in the hollow steel drum 4, and 1/3 of the hollow ball 7 is located outside the hollow steel drum 4, so as to ensure that the welded assembly of the hollow ball 7 and the hollow steel pipe 8 can All directions in the inner cavity of the steel drum 4 are free to rotate, increasing its deformation and energy dissipation capacity under earthquake action. The energy-dissipating spring 6 is an SMA shape-memory alloy, which has good deformation recovery ability due to its superelasticity, thereby increasing the damping effect of the damper. Wherein the first mild steel sheet and the second mild steel sheet are mild steel with a yield strength of 90MPa-190MPa, the upper end plate (1) and the lower end plate (2), the hollow steel barrel (4), the hollow ball (7 ) and hollow steel pipe (8) are steel with a yield strength of 235MPa. From the structure of the above damper, it can be seen that the energy-dissipating rubber 5, the energy-dissipating spring 6, the hollow ball 7 and the hollow steel pipe 8 form a detachable and replaceable energy-dissipating component, which realizes the replacement of the vulnerable components inside the replaceable damper. The mild steel sheets 3 are connected by bolts to ensure energy dissipation and shock absorption through shear deformation and friction rubbing.

As shown in Figure 1, when the damper of the present invention is in use, the plastic strain concentration area of the toe part of the shear wall 9 is hollowed out to form a placement cavity, which is used to place the damper, and the connectors are embedded in the shear wall Bolt holes are left in the middle, and the replaceable two-way composite energy-dissipating mild steel damper is through the bolt holes reserved on the upper end plate 1 and lower end plate 2, the bolt holes reserved in the pre-embedded connectors in the shear wall, and high-strength bolts Connected to the plastic strain concentration area of the toe part of the shear wall 9. The bolt holes of the upper end plate 1 and the lower end plate 2 have the same diameter and are arranged symmetrically. The size of the damper is determined by the size of the plastic zone at the toe of the shear wall to be replaced. The wall of the embedded parts in the shear wall has been determined at the time of design and pre-embedded during construction. The above-mentioned damper placement cavity is determined according to the magnitude of the energy of the earthquake and the plastic region where the shear wall is prone to damage under the earthquake. The size of the damper described in the utility model is determined according to the size of the damper placement cavity.

The bearing capacity of the shear wall 9 decreases due to the excavation of a certain space, and the lost bearing capacity is compensated by reducing the spacing of the horizontally distributed steel bars of the shear wall 9 within the parallel height range. The bearing capacity of the shear wall installed with the damper is basically the same as that of the original intact shear wall, and the energy dissipation capacity is far greater than that at the toe of the original shear wall to be replaced.

The main energy-consuming parts of the replaceable two-way composite energy-dissipating mild steel damper mentioned above will first generate plastic deformation and consume energy after the earthquake, so as to ensure that the structure itself is not damaged, and the damper or some damaged parts can be repaired after the earthquake. Remove and replace.

To sum up, the replaceable two-way composite energy-dissipating mild steel damper of the present invention can be bolted to the external structure through the bolt holes on the upper and lower end plates. The connection is stable and can be quickly replaced after an earthquake.

When the replaceable two-way composite energy-consuming soft steel damper provided by the utility model is used, it is placed at the toe of the shear wall, that is, the plastic area, so that the deformation capacity of the shear wall can be improved to effectively protect the The toe of the wall is protected from damage, and the replacement of the damper in the toe of the wall after the earthquake greatly improves the ability of the building to resume use after the earthquake, and its economy and practicability are stronger.

The energy-dissipating part of the replaceable two-way composite energy-dissipating mild steel damper of the utility model is mainly composed of three parts. The first part is rubber energy-dissipating part, which has the effect of cushioning and shock absorption when the damper is under pressure. The second part is the energy dissipation of the spring, which absorbs the seismic energy through the deformation of the spring when the damper is compressed. The third part is the friction and friction energy consumption of the mild steel sheet to bear the shear damage of the shear wall. At the same time, the hollow ball welded hollow steel pipe assembly is axially connected with the lower surface of the upper end plate 2, so that the center of the shaft connection point moves horizontally in a plane parallel to the mild steel sheet 3, and realizes the connection with the mild steel sheet 3. Collaborative work. The utility model can utilize rubber, soft steel sheets and springs to combine energy dissipation, so that the utility model has good energy dissipation capacity both in the vertical direction and in the horizontal direction.

Claims (8)

1. A replaceable two-way composite energy-dissipating mild steel damper, characterized in that it comprises an upper end plate (1) and a lower end plate (2), the upper end plate (1) and the lower end plate (2) are arranged up and down oppositely, and the lower end plate (2) Several hollow steel drums (4) are arranged symmetrically and fixedly on the upper side, and energy-dissipating rubbers (5) and energy-dissipating springs (6) are arranged in the hollow steel drums (4) sequentially from bottom to top; The surface is directly above each hollow steel drum (4) and is connected with a hollow steel pipe (8), and the lower end of the hollow steel pipe (8) is fixedly connected with a hollow ball (7), and the spherical surface of the hollow ball (7) bottom is connected with the consumption The upper end of energy spring (6) resists; The lower end plate (2) is fixedly connected with a plurality of first mild steel sheets, and the plurality of first mild steel sheets are distributed symmetrically around the periphery of all hollow steel drums (4); The lower surface of the upper end plate (1) is fixedly connected with a second mild steel sheet at a position corresponding to each first mild steel sheet, and the upper end of the first mild steel sheet and the lower end of the second mild steel sheet are respectively fixed A lower connecting end plate and an upper connecting end plate are connected, and the lower connecting end plate and the upper connecting end plate are offset and connected by bolts. 2. A replaceable two-way composite energy-dissipating mild steel damper according to claim 1, characterized in that the holes for bolts passing through the lower connecting end plate and the upper connecting end plate are elongated bolt holes, All elongated bolt holes are parallel to each other. 3. A replaceable two-way composite energy-dissipating mild steel damper according to claim 2, characterized in that, the rotating shafts of all hollow steel pipes (8) are parallel, and the rotating surfaces of the hollow steel pipes (8) are in line with the strip-shaped The length direction of the bolt holes is parallel. 4. A replaceable two-way composite energy-dissipating mild steel damper according to claim 1, characterized in that the energy-dissipating rubber (5) is superplastic silicone rubber. 5. A replaceable two-way composite energy-dissipating mild steel damper according to claim 1, characterized in that the material of the energy-dissipating spring (6) is SMA shape memory alloy. 6. A replaceable two-way composite energy-dissipating mild steel damper according to claim 1, characterized in that two-thirds of the hollow ball (7) is inside the hollow steel barrel (4). 7. A replaceable two-way composite energy-dissipating mild steel damper according to claim 1, characterized in that, the first mild steel sheet and the second mild steel sheet both use soft steel with a yield strength of 90MPa-190MPa. Steel, upper end plate (1) and lower end plate (2), hollow steel barrel (4), hollow ball (7) and hollow steel pipe (8) all adopt the steel that yield strength is 235MPa. 8. A replaceable two-way composite energy-consuming mild steel damper according to claim 1, characterized in that the lower end plate (2) is welded to the hollow steel drum (4), and the hollow steel pipe (8) is connected to the hollow The balls (7) are welded, the lower end plate (2) is welded to the first mild steel sheet, the upper end plate (1) is welded to the second mild steel sheet, and the first mild steel sheet is connected to the lower The end plate is welded, and the second mild steel sheet is connected to the end plate by welding.