FRACAS: A capacity spectrum approach for seismic fragility assessment including record-to-record variability
FRACAS: A capacity spectrum approach for seismic fragility assessment including record-to-record variability
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DOI：
10.1016/j.engstruct.2016.06.043
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发表时间：
2016-07
影响因子：
5.5
通讯作者：
T. Rossetto;P. Gehl;S. Minas;C. Galasso;P. Duffour;J. Douglas;Oliver Cook
中科院分区：
文献类型：
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作者：
T. Rossetto;P. Gehl;S. Minas;C. Galasso;P. Duffour;J. Douglas;Oliver Cook
本文提出了一种新的脆弱性曲线的推导方法——通过能力谱评估脆弱性（FRACAS）。FRACAS采用能力谱评价方法，利用地震地震动加速度谱导出的非弹性反应谱来构造易损性曲线。在描述了FRACAS方法之后，本文比较了两个案例研究建筑在150个自然加速度作用下的最大层间漂移（MIDR）响应，这些响应是由FRACAS和非线性时程分析（NLTHA）获得的。与NLTHA相比，FRACAS可以很好地代表两种病例研究结构的反应。观察了所得脆弱性曲线对能力谱评估和脆弱性曲线统计模型拟合假设的敏感性。本文还证明了FRACAS能够捕获非弹性记录到记录之间的可变性，并将其正确地转化为最终的脆性曲线。
This paper presents a new approach for the derivation of fragility curves, named FRAgility through Capacity spectrum ASsessment (FRACAS). FRACAS adapts the capacity spectrum assessment method and uses inelastic response spectra derived from earthquake ground motion accelerograms to construct fragility curves. Following a description of the FRACAS approach, the paper compares the predicted maximum interstory drift (MIDR) response obtained from FRACAS and nonlinear time history analyses (NLTHA) for two case-study buildings subjected to 150 natural accelerograms. FRACAS is seen to represent well the response of both case-study structures when compared to NLTHA. Observations are made as to the sensitivity of the derived fragility curves to assumptions in the capacity spectrum assessment and fragility curve statistical model fitting. The paper also demonstrates the ability of FRACAS to capture inelastic record-to-record variability and to properly translate this into the resulting fragility curves.