Local and models for nonlinear dynamic analysis of multi-story shear buildings subject to earthquake loading

Abstract

This paper proposes a global hysteretic model and establishes analytical relationship between the parameters of local and global hysteretic models for seismic analysis of multi-story shear type buildings. In both models, the analysis involves hysteretic constitutive laws commonly used in earthquake engineering to represent restoring forces and nonlinear dynamic analysis to estimate the seismic response of structural systems. However, when the global model is used, the dimension of dynamic structural analysis becomes much smaller, and hence, the computational effort can be reduced significantly. From the proposed relationship between these models, the local hysteretic behavior and damage can be recovered from analysis based on global models. Several numerical examples based on nondegrading and degrading hysteresis of both single- and multi-degree-of-freedom shear beam systems are presented to illustrate and validate the proposed methodology. The results suggest that the global model can provide accurate estimates of seismic response and damage characteristics of structural systems.