Residual displacement response spectrum and its application

Abstract

When structures are subjected to a large ground motion, residual displacement is developed associated with nonlinear hysteretic behavior. Excessive residual displacement is harmful for repair of the structures after an earthquake. The residual displacement developed in an oscillator with bilinear hysteretic restoring force model was analyzed for various ground motions, and it is proposed as 'residual displacement response spectrum.' After clarifying the effect of earthquake magnitude, epicentral distance and ground condition on the residual displacement response spectrum, the design value of the residual displacement response spectrum is proposed.