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本文探讨了经受地震运动的单层和多层钢筋混凝土框架的弹性和非弹性反应间的对比关系,以及刚度退化对延性需要的影响。抗强地震运动的结构必须能够承受很大的非弹性变形。非弹性变形或延性要求研究的一个难点是非弹性材料特性的模型化。弹塑性的弯矩曲率模型虽较好地描述了结构钢的特性,却未能计及应变硬化和鲍辛格效应。已知双线性滞回模型对模拟应变硬化是
This paper discusses the contrast between the elastic and inelastic responses of single-layer and multi-story reinforced concrete frames subject to seismic motion, and the effect of stiffness degradation on ductility requirements. Structures that resist strong earthquake motion must be able to withstand large inelastic deformations. One of the difficulties in the study of inelastic deformation or ductility requirements is the modeling of inelastic material properties. Although the elasto-plastic moment curvature model describes the characteristics of structural steels well, it fails to take into account the strain hardening and the Bauschinger effect. The known bilinear hysteresis model for simulated strain hardening is