Vibration isolation device for seismic resistance of building

Abstract

The invention provides a vibration isolation device for seismic resistance of a building, which is arranged between a building main body and a foundation buttress and comprises a uniform-thickness plate vibration isolation layer and a vibration isolation cushion. The uniform-thickness plate vibration isolation layer is arranged under the building main body, and the vibration isolation cushion is disposed between the uniform-thickness plate vibration isolation layer and the foundation buttress. The uniform-thickness plate vibration isolation layer replaces original upper buttresses, beams and plates. Objectively, a stopping position, namely a structural build-in end, of an upper structure is formed. A structure computing model is clear and reasonable, restriction to the design of a vibration isolation building is removed, and the vibration isolation device has a great significance for arrangement and adjustment of vibration isolation cushions and optimization for arrangement of structures below the vibration isolation cushions, and is particularly applicable to low-storey constructivity vibration isolation designs and high-storey shear wall structure vibration isolation designs. Besides, as limitation to the dimension of the plane of an upper buttress is eliminated due to the uniform-thickness plate vibration isolation layer, middle foundation buttresses can be connected in a friction manner, construction difficulty and manufacturing cost can be greatly reduced, and the vibration isolation cushions can be maintained, replaced and adjusted conveniently greatly.

Description

technical field [0001] The invention relates to a vibration isolation device for buildings and bridges, in particular to a vibration isolation device for building anti-seismic. Background technique [0002] Earthquakes cause great damage and loss to people and buildings. The traditional method is to rely on the strength and stiffness of the structure itself to resist earthquakes, and rely on the deformation and damage of structural components to consume the energy introduced into the building. This method is often sometimes It is impossible to prevent the collapse of a large earthquake, and the damage of buildings in an earthquake is often huge, which greatly exceeds the tolerance of the society and the owners. [0003] Seismic isolation technology is an effective method to prevent earthquake energy from entering buildings, which not only better protects buildings, reduces damage to buildings, but also effectively reduces or even prevents casualties. At present, the commonl...

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Problems solved by technology

At present, the commonly used seismic isolation technology is to set rubber bearings at the bottom of the building, but this technology has great defects, such as the small vertical stiffness of the rubber blocks, poor stability under horizontal loads, and the use of rubber blocks. not long wait

There are also some other seismic isolation bearings, some of which are more complicated to manufacture and higher in cost; some use steel components, because they are underground for a long time, and their durability problems such as rust prevention are difficult to deal with; some use PTFE boards as insulation It is difficult to ensure the adhesion between the two plates due to its durability and the long-term high pressure of the PTFE plate. There is no reliable evidence to prove that there will be no adhesion under this condition, and even if there is adhesion no serious harm

[0004] In particular, the conventional seismic isolation layer adopts the beam-slab structure and sets the upper pier of the seismic isolation bearing, which formally constitutes a column-beam-slab structural layer structure. The design code requires that the seismic isolation layer be included as a structural layer in the overall calculation model. The calculation model is blurred, the analysis theory is not perfect, and it is easy to cause low efficiency and difficult adjustment of the isolation support in the structural form other than the frame structure

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