Rigidity-variable vibration-isolating support seat

Abstract

The invention provides a rigidity-variable vibration-isolating support seat, comprising an upper support seat, a lower support seat, an upper connecting plate and a lower connecting plate, wherein the horizontal size of the lower support seat is greater than that of the upper support seat; the upper connecting plate is fixedly connected with an upper building; the lower connecting plate is fixedly connected with a lower building; the upper support seat is fixedly connected with the upper connecting plate; the lower support seat is fixedly connected with the lower connecting plate; the upper support seat is connected with the lower support seat through an intermediate separating plate; a limiting device is sleeved on the upper support seat; the upper end of the limiting device is fixedly connected with the upper connecting plate; the lower end of the limiting device is lower than the intermediate separating plate; and a clearance is reserved between the lower end of the limiting device and the intermediate separating plate. The rigidity-variable vibration-isolating support seat can provide different horizontal rigidities and damping forces in different forced states, can meet the vibration isolation and shock absorbing requirements on intermediate-high layer buildings when encountering earthquakes in different grades and guarantee the safety of people and property.

Description

technical field [0001] The invention relates to the technical fields of construction engineering and bridge engineering, in particular to a vibration-isolation bearing with variable stiffness used for construction engineering structures and bridge structures. Background technique [0002] In the design of building structures, the installation of shock-isolation and shock-absorbing bearings can effectively reduce earthquake disasters. [0003] According to the requirements of the national standard GB50011-2001 "Code for Seismic Design of Buildings", rubber seismic isolation bearings are usually used as seismic isolation devices. Existing seismic isolation bearings generally include laminated rubber and upper and lower partitions arranged on the laminated rubber. The upper and lower partitions of the seismic isolation bearing are connected to building components through upper and lower connecting plates . [0004] The horizontal stiffness of the existing shock-isolation supp...

AI Technical Summary

Problems solved by technology

If the building uses a seismic isolation bearing with a large horizontal stiffness, when an earthquake with a small magnitude occurs, the external force on the seismic isolation bearing is less than the minimum force that can deform, and the seismic isolation bearing does not deform and cannot function. Seismic isolation and shock absorption; if the building uses a seismic isolation bearing with a small horizontal stiffness, when an earthquake with a large magnitude occurs, the external force on the seismic isolation bearing may be greater than the maximum force it can withstand. Excessive deformation or even destruction of the seat will endanger the safety of the building

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