State of the Art Review of Stiffness and Strength Degradation Models for Seismic Response Analysis of Reinforced Concrete Structures

摘要

Reinforced concrete members subjected to repeated cyclic load reversals may experience stiffness degradation, pinching and strength deterioration. Ductile response dominated by flexural yielding shows stable hysteresis loops, whereas nonductile response governed by shear or shear-flexure failure shows pinching and significant reduction in lateral strength and, hence, should be accounted for in the models for earthquake response analysis. This paper presents a review of the current state of knowledge on component hysteretic models incorporating the effects of shear failure and interaction of flexure-shear-axial force. Characteristic features of hysteretic response of reinforced concrete members are summarized and the effects of different hysteretic behaviours on seismic response are discussed with focus on the strength deterioration and stiffness degradation.