Alternative non‐linear demand estimation methods for probability‐based seismic assessments
Alternative non‐linear demand estimation methods for probability‐based seismic assessments
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DOI：
10.1002/eqe.876
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发表时间：
2009-07
影响因子：
4.5
通讯作者：
F. Jalayer;C. Cornell
中科院分区：
文献类型：
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作者：
F. Jalayer;C. Cornell
替代的非线性动力分析程序，使用真实的地面运动记录，可以用来进行基于概率的地震评估。这些程序既可用于获得特定概率评估标准（如需求和容量因素设计）的参数估计，也可用于使用数值方法进行直接概率性能评估。多条纹分析是一种非线性动态分析方法，可用于从破坏开始到整体崩溃的大范围地震动强度和多个性能目标的基于性能的评估。另外，性能评估中所需的分析工作量可以通过进行结构分析和估计感兴趣的地面运动强度水平区域的主要参数来减少。特别是，单条和双条分析可以使用最少数量的结构分析（大约20到40）提供本地概率需求评估。作为一个案例研究，对一个老旧的钢筋混凝土框架结构的基于位移的抗震性能进行了评估，该结构已知在1994年北岭地震中其柱遭受了剪切破坏。版权所有©2008 John Wiley & Sons， Ltd
Alternative non‐linear dynamic analysis procedures, using real ground motion records, can be used to make probability‐based seismic assessments. These procedures can be used both to obtain parameter estimates for specific probabilistic assessment criteria such as demand and capacity factored design and also to make direct probabilistic performance assessments using numerical methods. Multiple‐stripe analysis is a non‐linear dynamic analysis method that can be used for performance‐based assessments for a wide range of ground motion intensities and multiple performance objectives from onset of damage through global collapse. Alternatively, the amount of analysis effort needed in the performance assessments can be reduced by performing the structural analyses and estimating the main parameters in the region of ground motion intensity levels of interest. In particular, single‐stripe and double‐stripe analysis can provide local probabilistic demand assessments using minimal number of structural analyses (around 20 to 40). As a case study, the displacement‐based seismic performance of an older reinforced concrete frame structure, which is known to have suffered shear failure in its columns during the 1994 Northridge Earthquake, is evaluated. Copyright © 2008 John Wiley & Sons, Ltd.