Multi-dimensional seismic isolation support based on vertical variable stiffness and horizontal self-return

Abstract

The invention relates to a multi-dimensional seismic isolation support based on vertical variable stiffness and horizontal self-return. The support is mainly composed of a sleeve component, a lower connecting plate, a side coaming, concrete, an upper connecting plate and SMA self-return assemblies; under strong vertical seismic excitation, an inner core is bent, and the vertical rigidity of the support is greatly reduced so as to realize seismic isolation; in the horizontal direction, lantern rings are welded to the upper portion of the inner core, the lantern rings are connected through the SMA self-return assemblies, the lantern rings are connected with the side coaming through the SMA self-return assemblies, a structural seismic isolation layer can laterally move to a certain degree toachieve horizontal seismic isolation, and returning can be achieved through the SMA self-return assemblies after lateral movement; and a sensor can be arranged at the position where the inner core possibly makes contact with an outer pipe so as to monitor the working state of the support. Compared with the prior art, the support realizes multi-dimensional seismic isolation through the rigidity change after a pressing rod is bent and the characteristic of self-return after horizontal lateral movement, is suitable for structural multi-dimensional seismic isolation with a vertical vibration control function, and has the characteristics that the structure is simple, the cost is relatively low, and the reliability is relatively high.

Description

technical field [0001] The invention belongs to the field of vibration-isolation bearing technology and health monitoring, and in particular relates to a multi-dimensional vibration-isolation bearing based on vertical variable stiffness and horizontal self-resetting. Background technique [0002] Because it can effectively isolate the effect of seismic waves on the superstructure, seismic isolation bearings have attracted extensive attention from engineering and academic circles. At present, in the seismic isolation design of building structures, only horizontal seismic action is generally considered, and vertical seismic isolation is seldom considered. Laminated rubber bearings, sliding isolation bearings and rolling isolation bearings, which are widely used in practical engineering, perform well in reducing the horizontal earthquake action, but they do not have the effect of vertical isolation, and even have a certain amplification effect . [0003] Different from the ho...

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Problems solved by technology

In 2016, Shang Shouping proposed a three-dimensional seismic isolation pier composed of concrete upper pier blocks, lower pier blocks, asphalt ointment and spiral springs. The support has good seismic isolation effect, simple structure, and low price, and is suitable for high-intensity It is popularized and applied in residential seismic isolation in rural areas, but the bearing capacity of the bearing is low, and it can only be used for 1-3 storey village buildings and cultural relics protection buildings

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