Inelastic Seismic Response of R/C Structural Systems in terms of Hysteresis Modelling in Overall Sense: State of the Art

Abstract

Seismic performance of reinforced concrete(R/C) membered structure during earthquakes has been differed significantly from their intended behavior due to progressive loss of strength and stiffness. In this context, from the macro scale point of view, the present study aims to provide an overview of hysteresis model development to assess progressive seismic damage of an entire structural system. Considering the requirement of number of input parameters and complexity to solve the corresponding equations, this study presents a state of the art review of different modelling philosophies by grouping them in i) simpler hysteresis model and ii) complex hysteresis model. It is found out that in comparison with complex hysteresis models, which require case-specific detailed calibration study, simpler hysteresis model on the other hand can predict the behavior of R/C structural elements with progressively degraded strength and stiffness in approximate yet realistic manner, which is more acceptable to predict the overall behavior of structures. Recognizing the same, simpler hysteresis models are emphasized in this study. Significant number of hysteresis models have been analyzed to highlight previous drawbacks, subsequently a simpler enhanced hysteresis model has also been proposed with greater accuracy taking care of non-specificness, computational efficiency and mathematical tractability.