Self-adaptive variable-stiffness three-dimensional shock/vibration isolation device

Abstract

The invention relates to the field of civil engineering and mechanical engineering and the technical field of shock / vibration isolation, and provides a self-adaptive variable-stiffness three-dimensional shock / vibration isolation device. The self-adaptive variable-stiffness three-dimensional shock / vibration isolation device comprises a stress assembly used for receiving impact force and an elastic support. The support carries the stress assembly, among a plurality of cross sections formed by horizontally cutting the support in the direction perpendicular to the impact force, the areas of at least two cross sections are different. According to the self-adaptive variable-stiffness three-dimensional shock / vibration isolation device, different horizontal stiffness and damping forces can be provided in different stress states through the variable cross-section support, the shock insulation / vibration requirements of large-span space structures and middle and high-rise buildings when the large-span space structures and the middle and high-rise buildings encounter different levels of building environment vibration and earthquakes can be met, and then the purpose of self-adaptive variable stiffness is achieved; and a good effect of isolating environment vibration and vertical seismic oscillation can be achieved.

Description

technical field [0001] The invention relates to the fields of civil engineering and mechanical engineering and the field of shock isolation / vibration technology, in particular to an adaptive variable stiffness three-dimensional shock isolation / vibration device. Background technique [0002] Base isolation technology is regarded as one of the most important technological advances in the field of earthquake engineering in the 20th century, and has been widely used in the world. The basic principle of seismic isolation technology is to set the seismic isolation support at the bottom of the building to obtain a seismic isolation layer with low horizontal stiffness, and reduce the seismic acceleration response of the upper structure through the filtering effect. And by setting the energy dissipation device on the seismic isolation layer to absorb and consume the earthquake vibration energy. Modern seismic isolation technology has a history in recent years and belongs to a passiv...

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Problems solved by technology

Second, there is a contradiction between the traditional seismic isolation bearing in the horizontal direction to achieve a better seismic isolation effect and control the limit displacement of the seismic isolation layer

If the building uses a seismic isolation bearing with a large horizontal stiffness, when traffic vibrations and earthquakes with a small magnitude occur, the external force on the isolation bearing is less than the minimum force that can deform, and the isolation bearing does not deform. It cannot play the role of shock isolation and shock absorption; if the building uses a shock-isolation support with a small horizontal stiffness, when a traffic vibration or earthquake with a large magnitude occurs, the external force on the shock-isolation support may be greater than what it can withstand Maximum force, excessive deformation or even destruction of the seismic isolation bearing, endangering the safety of the building

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