【摘要】 随着基于性能抗震设计理论的发展,地震损伤指标在建立性能目标量化准则和加固决策方面受到重视。地震损伤模型的建立以及验证大多是以建筑结构为基础,鲜有以桥梁结构,更少针对桥梁结构对各种典型滞回模型进行比较总结。本文以钢筋混凝土桥墩为研究对象,对8个典型的地震损伤模型进行了对比分析研究。研究表明,不同损伤模型确定的损伤指数差异较大,损伤指数发展趋势与实际试验中破坏程度不能很好对应;Park&Ang模型与试验符合较好;刘伯权模型考虑了低周疲劳效应概念简单、应用方便。更多还原

【Abstract】 Damage indices have the potential to play vital role in defining performance objectives and retrofit decision-making in earthquake regions with the development of performance based seismic design theory recently.However,a major limitation of existing indices is that they have been formulated and validated almost exclusively on the basis of building structures,neglecting bridge structures.In this paper,eight damage indices are evaluated by comparison of a series of bridge pier tests.On the basis of these comparisons,it appears that the indices which attempt to take account of the damage caused by repeated cycling give no more reliable indication of damage.The Park&Ang model provides a more reliable indication of the various damage levels.The Liu model which takes account of low-cyclic fatigue has clear concept and is easy for application.更多还原