Multi-dimensional seismic isolation bearing based on vertical variable stiffness and horizontal self-resetting

Abstract

The invention relates to a multi-dimensional shock-isolation bearing based on vertically variable stiffness and horizontal self-resetting, mainly composed of a sleeve member, a lower connecting plate, a side panel, concrete, an upper connecting plate, and an SMA self-resetting component. Under strong vertical earthquake excitation, the inner core buckles, and its vertical stiffness will be greatly reduced to achieve seismic isolation; in the horizontal direction, the upper part of the inner core is welded with collars, and the SMA self-resetting components are passed between the collars and the collar and the side wall Connection, the structure isolation layer can have a certain side shift to achieve horizontal vibration isolation, and can be reset through the SMA self-resetting component after the side shift occurs. Sensors can be arranged at positions where the inner core and the outer tube may come into contact to monitor the working state of the support. Compared with the prior art, the present invention utilizes the stiffness change after buckling of the compression bar and the self-resetting characteristics after horizontal lateral displacement to realize multi-dimensional seismic isolation, which is suitable for multi-dimensional seismic isolation of structures in which vertical vibration plays a controlling role, and has a simple structure , low cost and high reliability.

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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