Variable stiffness three-dimensional seismic isolation method and device

Abstract

The invention belongs to the field of civil engineering and mechanical engineering and the field of shock isolation technology, and aims to propose a novel variable stiffness three-dimensional shock isolation device and method that has sufficient vertical bearing capacity and vertical variable stiffness control capability, and also has suitable horizontal stiffness , to ensure the overall stability and work safety of the three-dimensional vibration isolation device. For this reason, the technical solution adopted by the present invention is that the variable stiffness three-dimensional seismic isolation method and device include an upper vertical seismic isolation system, a lower laminated rubber bearing and connecting parts; the vertical seismic isolation system includes a vertical seismic isolation system Connecting plate on the top of the device, balls, side plates around, longitudinal stiffeners, upper limit block, one layer of main spring, middle layer connecting plate, middle layer spring, lower layer connecting plate, lower steel block, bottom limit block, bottom spring, The middle limit block, high-strength bolts, and the bottom connecting plate of the vertical shock isolator. The invention is mainly applied to the occasion of mechanical engineering vibration isolation design.

Description

technical field [0001] The invention belongs to the field of civil engineering and mechanical engineering and the field of seismic isolation technology, and relates to a novel variable stiffness three-dimensional seismic isolation device and method that has sufficient vertical bearing capacity and vertical variable stiffness control capability, and also has suitable horizontal stiffness. It is suitable for seismic isolation in industrial and civil buildings, bridges, underground buildings and other fields. Background technique [0002] For countries with frequent earthquake disasters, how to carry out seismic isolation and shock absorption design for construction projects is an important problem and development direction. In the field of structural vibration control, the research and development of seismic isolation technology is the most mature, and has attracted the attention and research of many scholars and engineers in recent years. At present, the research on seismic ...

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Problems solved by technology

[0004] In terms of three-dimensional seismic isolation, scholars at home and abroad have done a lot of research and developed many kinds of three-dimensional seismic isolation bearings that can be used in engineering practice, such as lead core rubber disc spring three-dimensional seismic isolation bearings, SMA-laminated rubber isolators, etc. Vibration bearings, friction-disc spring three-dimensional composite isolation bearings, etc., but the vertical isolation period of these three-dimensional isolation bearings is relatively short

Although the three-dimensional seismic isolation using technologies such as air springs and hydraulic pressure can achieve a longer period, the structure is relatively complicated and the cost is expensive. It is mainly used for seismic isolation of nuclear industry facilities, and it is difficult to widely promote it in the field of engineering structures.

In addition, the traditional three-dimensional seismic isolation device needs to take into account the different requirements of limiting the deformation under the action of self-weight and live load and prolonging the isolation period during earthquakes. The design is relatively difficult, which makes the structure of the three-dimensional seismic isolation bearing currently studied more complicated.

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