An earthquake-source-based metric for seismic fragility analysis

An earthquake-source-based metric for seismic fragility analysis
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基于震源的地震易损性分析指标

DOI:
10.1007/s10518-018-0341-9
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发表时间:
2018
影响因子:
4.6
通讯作者:
Grigoriu, Mircea
Grigoriu, Mircea
中科院分区:
工程技术2区
文献类型:
--
作者:
Radu, Alin;Grigoriu, Mircea

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系统的地震易损性是指系统在具有特定特征的地震动下进入破坏状态的概率。相对于标量地震动强度量度的地震易损性曲线称为易损性曲线。最近的研究表明,易损性曲线可能不是结构抗震性能的令人满意的指标,因为标量烈度指标不能全面地表征场地的地震活动。文中详细讨论了传统地震烈度测量方法的局限性,如峰值地面加速度或伪谱加速度。提出了一种具有坐标矩大小和震源到场地距离的二元向量作为替代的地震烈度量度。隐含地,(m,r)空间中的易损面可以用作地震易损性的图形表示。与作为标量烈度函数的易损性曲线不同,易损性表面由两个地震危险性参数(m,r)来表征。对于复杂的系统来说,脆性表面的计算可能是计算昂贵的。为此,提出了脆性表面的二元对数正态参数模型和基于随机降阶模型的有效计算方法。
The seismic fragility of a system is the probability that the system enters a damage state under seismic ground motions with specified characteristics. Plots of the seismic fragilities with respect to scalar ground motion intensity measures are called fragility curves. Recent studies show that fragility curves may not be satisfactory measures for structural seismic performance, since scalar intensity measures cannot comprehensively characterize site seismicity. The limitations of traditional seismic intensity measures, e.g., peak ground acceleration or pseudo-spectral acceleration, are shown and discussed in detail. A bivariate vector with coordinates moment magnitudemand source-to-site distanceris proposed as an alternative seismic intensity measure. Implicitly, fragility surfaces in the (m,r)-space could be used as graphical representations of seismic fragility. Unlike fragility curves, which are functions of scalar intensity measures, fragility surfaces are characterized by two earthquake-hazard parameters, (m,r). The calculation of fragility surfaces may be computationally expensive for complex systems. Thus, as solutions to this issue, a bi-variate log-normal parametric model and an efficient calculation method, based on stochastic-reduced-order models, for fragility surfaces are proposed.
烈度测量选择对 3-D 建筑物地震损失评估的影响
DOI: 10.1193/112215eqs177m
发表时间: 2016
期刊: Earthquake Spectra
影响因子: 5
作者:
M. Kohrangi;D. Vamvatsikos;P. Bazzurro
通讯作者: P. Bazzurro
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DOI: 10.1785/0120070018
发表时间: 2007
影响因子: 3
作者:
J. Klügel
通讯作者: J. Klügel
DOI: 10.1016/j.probengmech.2010.04.001
发表时间: 2010
影响因子: 2.6
作者:
Y. Choun;A. Elnashai
通讯作者: A. Elnashai
DOI: 10.1016/j.probengmech.2009.05.005
发表时间: 2010
影响因子: 2.6
作者:
P. Koutsourelakis
通讯作者: P. Koutsourelakis
DOI: 10.1002/eqe.571
发表时间: 2006-07-25
影响因子: 4.5
作者:
Baker, Jack W.;Cornell, C. Allin
通讯作者: Cornell, C. Allin