Study Of The Composite Base Isolation Structure Earthquake Resistance Performance Simplification Computational Method

The main purpose of this paper is to study a simplified calculating method of composite base isolation struture, to determine stiffness on every stage through friction base isolator and rubber bearing hysteresis curve, to determine the calculated model of the composite base isolation layer according to the two calculated models, to determine the compound separates shakes the level system the equivalent darameter using equivalent linear law. We bond separates shakes the equivalent linearization to stagnate the curve F-D curve to transform for the shearing force coefficient - displacement curve will be theα-D curve using the equivalent linear law. Through making diagrams using matlab program ,first we must know submits the shearing force coefficientα_s, the space characteristic Tg, stiffness concern a modulusβ, biggest shearing force coefficientα_max.Then we can get shaking tier of base shearing force modulusαand shaking tier of displacement across D, which will define structure basis shearing force F_ek and verify if structure displacement D satisfy standard structure request displacement [D]. Therefore, the designer can estimate the earthquake reaction of the composite base isolation structure directly.