Story-specific demand models and seismic fragility estimates for multi-story buildings
Story-specific demand models and seismic fragility estimates for multi-story buildings
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DOI：
10.1016/j.strusafe.2010.09.002
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发表时间：
2011
影响因子：
5.8
通讯作者：
J. Bai;P. Gardoni;M. B. Hueste
中科院分区：
文献类型：
--
作者：
J. Bai;P. Gardoni;M. B. Hueste
本文建立了多层建筑的地震需求模型。开发了考虑每个楼层最大层间漂移的特定楼层需求模型。个别楼层需求模型之间的相关性也进行了评估，以正确地捕捉最大层间漂移超过建筑物的高度之间的潜在依赖性。采用对数空间中的线性和双线性模型来描述漂移需求与地震强度之间的关系。贝叶斯方法用于估计模型参数。开发的需求模型被用来估计两个例子建筑物的地震易损性。脆弱性的估计与目前可用的估计的基础上需求模型的整体最大层间漂移。结果表明，当只考虑最大层间位移的建筑物，脆弱性可能被低估，特别是如果层间位移的一个或多个层接近最大值。所提出的方法提供了一个完善的方法，包括更多的建筑物的响应信息比典型的需求模型，允许更准确的估计多层建筑物的地震脆弱性。
This paper develops seismic demand models for multi-story buildings. Story-specific demand models that consider the maximum interstory drift of each story are developed. Correlations among individual story demand models are also assessed to properly capture the potential dependence between maximum interstory drifts over the height of a building. Both linear and bilinear models in logarithmic space are considered to describe the relationships between drift demand and seismic intensity. A Bayesian approach is used to estimate the model parameters. The developed demand models are used to estimate the seismic fragility of two example buildings. The fragility estimates are compared with currently available estimates based on demand models for the overall maximum interstory drift. It is shown that when only the maximum interstory drift of a building is considered, the fragility might be underestimated; particularly if the interstory drifts for one or more stories are close to the maximum value. The proposed methodology provides a refined approach that includes more building response information than typical demand models, allowing for more accurate estimates of the seismic fragility of multi-story buildings.