Hysteretic models that incorporate strength and stiffness deterioration
Hysteretic models that incorporate strength and stiffness deterioration
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DOI：
10.1002/eqe.495
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发表时间：
2005-10
影响因子：
4.5
通讯作者：
L. Ibarra;R. Medina;H. Krawinkler
中科院分区：
文献类型：
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作者：
L. Ibarra;R. Medina;H. Krawinkler
本文介绍了相对简单的滞后模型的描述、校准和应用，其中包括强度和刚度恶化特性，以及当结构系统接近倒塌时对需求预测至关重要的特征。地震需求评估中使用的三种基本滞回模型经过修改，包括恶化特性：双线性、峰值导向和收缩。修改后的模型包括大多数劣化来源：即各种循环劣化模式和屈服后刚度软化，并且还考虑了劣化后的残余强度。该模型包含基于能量的劣化参数，该参数控制四种循环劣化模式：基本强度、封盖后强度、卸载刚度和加速重载刚度劣化。对钢、胶合板和钢筋混凝土构件的迟滞模型的校准表明，所提出的模型能够模拟影响劣化的主要特征。阐述了峰值导向恶化模型在单自由度（SDOF）系统地震评估中的应用。讨论了使用恶化的滞后模型来获得高度非弹性系统的响应的优点。版权所有 © 2005 约翰·威利父子有限公司
This paper presents the description, calibration and application of relatively simple hysteretic models that include strength and stiffness deterioration properties, features that are critical for demand predictions as a structural system approaches collapse. Three of the basic hysteretic models used in seismic demand evaluation are modified to include deterioration properties: bilinear, peak‐oriented, and pinching. The modified models include most of the sources of deterioration: i.e. various modes of cyclic deterioration and softening of the post‐yielding stiffness, and also account for a residual strength after deterioration. The models incorporate an energy‐based deterioration parameter that controls four cyclic deterioration modes: basic strength, post‐capping strength, unloading stiffness, and accelerated reloading stiffness deterioration. Calibration of the hysteretic models on steel, plywood, and reinforced‐concrete components demonstrates that the proposed models are capable of simulating the main characteristics that influence deterioration. An application of a peak‐oriented deterioration model in the seismic evaluation of single‐degree‐of‐freedom (SDOF) systems is illustrated. The advantages of using deteriorating hysteretic models for obtaining the response of highly inelastic systems are discussed. Copyright © 2005 John Wiley & Sons, Ltd.