Dynamic Reliability-Based Seismic Design Method of Nonlinear Multi-Grid Composite Wall

Abstract

A multi-grid composite wall was recently proposed for seismic resistance. A seismic design method for the multi-grid composite wall, based on dynamic reliability calculations and using the subset simulation method is proposed in this paper. A hysteretic model of multi-grid composite walls for nonlinear analysis is proposed according to the hysteretic curves obtained from cyclic lateral loading tests. Parameters of the tri-linear envelope curve are obtained by empirical models and regression analysis. Parameters of the hysteretic rules are identified by the least-squares method. Procedures of the seismic design method are presented. Initial design of the composite walls is made according to Chinese code for seismic design of buildings. A random earthquake ground motion model is obtained by multiplying the time envelop function with Gaussian stationary processes. Parameters of the model are determined by Chinese code for seismic design of buildings. A subset simulation method is employed for failure probability calculations. Dynamic Reliability-based seismic design of a 6-story multi-grid composite wall with the aforementioned procedures is taken as an example to demonstrate the proposed method.