A magnetic field alternating particle damping-lead damping multi-stage damping wall

Abstract

The invention discloses a multi-stage damping wall based on magnetic field alternating particle damping-lead damping, which includes a wall, a hole, a waveform piezoelectric ceramic, an insulating block, a damper cavity, a cavity bracket, a round hole, an electromagnetic Particles, excitation coils, baffles, square tubes, rectangular plates, grooves, lead filling holes, lead blocks, habitual piercing holes, insulating plates. When the electromagnetic particles collide with the main structure, electric energy is generated through the waveform piezoelectric ceramics, and an alternating magnetic field is generated when the current passes through the excitation coil. The number of collisions between them also improves the efficiency of momentum exchange between the two, and has sufficient energy dissipation capacity. The lead energy dissipation device can provide lateral stiffness for the main structure, and at the same time, the lead block also fully exerts its energy dissipation effect when it yields. Make the seismic performance of the wall more excellent, so as to reduce the damage degree and maintenance cost of the structural main body in the earthquake.

Description

technical field [0001] The invention relates to a magnetic field alternating type particle damping-lead damping multistage damping wall body capable of realizing strong energy consumption in buildings, and belongs to the technical field of damping control of structural engineering. Background technique [0002] With the development of society and the frequent occurrence of earthquakes in recent years, people pay more and more attention to the anti-seismic performance of buildings, but the anti-seismic design of buildings in most parts of our country is not perfect. Previous earthquake disasters have shown that due to improper construction, design and maintenance of building structures, many buildings have poor seismic performance, and severe deformation or even collapse occurs during earthquakes, resulting in huge economic losses and casualties. In the earthquake damage of building structures, a large part is due to the damage of the wall itself. The damage not only affects ...

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Problems solved by technology

Reinforced concrete shear walls have a large reinforcement ratio, complex construction, high engineering costs, and less applications than reinforced concrete frame structures

Generally, the combined wall only improves the anti-seismic performance through the combination of different walls, and the anti-seismic effect is not significant.

In recent years, some researchers have proposed wall forms with vertical deformation joints, but for thicker walls, the process of opening joints is complicated, the sound insulation effect is poor, and the design is difficult, and deformation joints are easy to appear in earthquakes. Partial damage and not easy to repair

Some researchers also proposed to install viscous dampers or metal dampers in the wall to improve the vibration reduction performance of the wall, but there are also shortcomings. The viscous damper has a good vibration reduction effect under wind vibration or frequent earthquakes. , but the shock absorption effect is poor under the rare earthquake action, and the metal damper has a good shock absorption effect under the earthquake action, but the wind resistance effect is poor

Compared with the current energy dissipation device, the particle damping device has the effect of damping both wind vibration and earthquake, but the number of collisions between the particle and the main structure is limited, which reduces the efficiency of momentum exchange between the two and limits the particle damping device. Although the efficiency of momentum exchange between particles and the main structure can be improved through active control or semi-active control methods, such as electromagnetic particle dampers and magnetic suspension particle dampers, there is an input of external energy and high cost. , Not conducive to installation in the wall and other issues

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