吴巧云, 朱宏平, 樊剑. 基于性能的钢筋混凝土框架结构地震易损性分析[J]. 工程力学, 2012, 29(9): 117-124. DOI: 10.6052/j.issn.1000-4750.2010.12.0944
引用本文: 吴巧云, 朱宏平, 樊剑. 基于性能的钢筋混凝土框架结构地震易损性分析[J]. 工程力学, 2012, 29(9): 117-124. DOI: 10.6052/j.issn.1000-4750.2010.12.0944
WU Qiao-yun, ZHU Hong-ping, Fan Jian. PERFORMANCE-BASED SEISMIC FRAGILITY ANALYSIS OF RC FRAME STRUCTURES[J]. Engineering Mechanics, 2012, 29(9): 117-124. DOI: 10.6052/j.issn.1000-4750.2010.12.0944
Citation: WU Qiao-yun, ZHU Hong-ping, Fan Jian. PERFORMANCE-BASED SEISMIC FRAGILITY ANALYSIS OF RC FRAME STRUCTURES[J]. Engineering Mechanics, 2012, 29(9): 117-124. DOI: 10.6052/j.issn.1000-4750.2010.12.0944

基于性能的钢筋混凝土框架结构地震易损性分析

PERFORMANCE-BASED SEISMIC FRAGILITY ANALYSIS OF RC FRAME STRUCTURES

  • 摘要: 钢筋混凝土结构易损性的研究大多数集中于地震烈度或地震动峰值加速度上(PGA),地震动的选取亦没有考虑近远场地震的不同,且对于房屋建筑的研究较少.因此综合考虑地震动峰值加速度及阻尼比为 5%的谱加速度,考虑近场及远场地震的不同性质,对一钢筋混凝土框架房屋进行地震易损性分析.定义了结构整体的4 个极限破坏状态,提出了基于结构极限破坏状态确定结构抗震性能水平的方法.最后基于增量动力分析(IDA)的结果,采用该方法对结构进行基于性能的地震易损性分析,得到结构的易损性曲线,对结构在不同IM 参数及不同地震动下的易损性能进行评估和对比分析.从而可以根据结构的实际地震需求从概率意义上判断结构所处的地震破坏状态,为今后震害预测提供了参考.

     

    Abstract: The traditional research of structural vulnerability of RC structures mostly focuses on seismic intensity or peak ground acceleration (PGA). The selection of ground motions did not considered the difference between near-field and far-field earthquakes, and the research on building construction is less. Therefore, comprehensively considering the peak ground acceleration and damping ratio of 5% of the spectral acceleration, considering the different natures of near-field and far-field ground motions, fragility analysis on some RC frame structures was did. Four ultimate damage states for entire structure were defined, and based on the definition, a method for solving the limit values of the four performance levels was put forward. Finally, based on the results of incremental dynamic analysis (IDA), the performance-based seismic fragility analysis was carried out using this method, and fragility curves were derived to assess and compare the seismic performances under different IM parameters and different ground motions. According to the actual seismic demand of the structure, it can determine the damage states from the sense of probability, and provide a reference for future seismic damage prediction.

     

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