单自由度体系残余位移分析及损伤评价

发布时间：2018-01-15 13:07

本文关键词：单自由度体系残余位移分析及损伤评价　出处：《地震工程与工程振动》2017年05期 　论文类型：期刊论文

【摘要】：结构经历地震后的残余位移可作为结构震后可修复能力的重要指标,研究结构的残余位移对于地震灾区震损结构性能的评价具有重要意义。本文以双线型单自由度体系为计算模型,选取了中国规范对应的4种场地120条地震动,通过弹塑性动力时程分析,分析了场地条件、屈服后刚度比、强度折减系数和周期等参数对残余位移的影响。分析结果表明,场地条件、屈服后刚度比和周期是影响残余位移的主要因素,强度折减系数对残余位移的影响不大。相关性分析表明,结构的残余位移与最大位移、滞回耗能之间存在较好的线性关系。以Park-Ang损伤模型为基础,提出了震后单自由度体系基于残余位移的损伤评价方法。
[Abstract]:The residual displacement of the structure after earthquake can be regarded as an important index of the repairable ability of the structure after the earthquake. It is very important to study the residual displacements of structures for the evaluation of seismic damage structure performance. In this paper, the two-linear single-degree-of-freedom system is used as the calculation model. In this paper, 120 ground motions corresponding to four kinds of sites in Chinese codes are selected, and the site conditions and stiffness ratio after yielding are analyzed by means of elastoplastic dynamic time history analysis. The results show that the site condition, the ratio of stiffness after yield and the period are the main factors affecting the residual displacement. The strength reduction coefficient has little effect on the residual displacement. The correlation analysis shows that the residual displacement and the maximum displacement of the structure. There is a good linear relationship between hysteretic energy dissipation. Based on Park-Ang damage model, a damage evaluation method based on residual displacement for single degree of freedom system after earthquake is proposed.
【作者单位】：湖南大学土木工程学院;桥梁结构安全控制湖南省工程实验室(长沙理工大学);哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51408211) 长沙理工大学桥梁结构安全控制湖南省工程实验室开放基金项目(14KD02) 湖南省自然科学基金项目(2015JJ3032) 国家留学基金委资助项目(201606135057)~~
【分类号】：TU311.3
【正文快照】： Supported by:National Natural Science Foundation of China(51408211);Open Fund of Hunan Province Engineering Laboratory of Bridge Structure(Changsha University of ScienceTechnology)(14KD02);Natural Science Foundation of Hunan(2015JJ3032);State Scholarshi

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