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首页> 外文期刊>Bulletin of earthquake engineering >Exploratory factor analysis-based method to develop compound intensity measures for predicting potential structural damage of ground motion
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Exploratory factor analysis-based method to develop compound intensity measures for predicting potential structural damage of ground motion

机译：Exploratory factor analysis-based method to develop compound intensity measures for predicting potential structural damage of ground motion

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摘要

To accurately predict and quantify the potential structural damage (PSD) of ground motion records (GMRs), an intensity measure (IM) that correlates well with the structural response is needed. This paper proposes an exploratory factor analysis (EFA)-based approach for developing a compound intensity measure (CIM) for characterizing the PSD of GMRs. EFA is used to preferentially extract principal factors that are related to the acceleration, velocity and displacement of GMRs through compression of the selected IMs of three groups of GMRs. Then, the CIM is developed with a linear combination of the extracted principal factors on a log-scale. The explanations of variance corresponding to each principal factor are used to quantify the contributions of a single IM to the developed CIM. Applications to single-degree-of-freedom (SDOF) systems modeled with different hysteretic models and multiple-degree-of-freedom systems subjected to three groups of GMRs demonstrate the feasibility of the proposed approach. The results of the correlation between the developed CIM and structural demand confirm the robust performance of the proposed approach in estimating the predictability of the developed CIM for measuring the PSD of GMRs. The efficiency of the developed CIM for SDOF systems is found to be approximately of the same magnitude irrespective of hysteretic models, and the developed CIM is sufficient and proficient in structural demand evaluation with good confidence.

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