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Incremental pseudo-multi impulse analysis (ICPMIA) is a parametric analysis method for evaluating the nonlinear response of a structure that performs a critical pseudo-multi impulse analysis considering various pulse velocities. In this analysis, the number of impulsive inputs (Np) is a key parameter. In this study, the suitable Np to represent the response of reinforced concrete (RC) moment-resisting frame (MRF) models subjected to near-fault earthquake ground motions is investigated in the following manner. First, a nonlinear time history analysis (NTHA) of the RC MRF models is performed using the velocity pulse model proposed by Mavroeidis and Papageorgiou (2003). Then, the ICPMIA of the RC MRF models is performed considering various Np and is compared with the NTHA results. The Np evaluation is based on the relationship between the equivalent velocity of the maximum momentary input energy and that of the cumulative input energy. The severest responses obtained from the NTHA results are also compared with those obtained from the ICPMIA results.

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Choice of the Number of Impulsive Inputs in the ICPMIA as a Substitute for Near-Fault Seismic Input to RC MRFs

  • 会议论文

  • 发表日期：

    2025年

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  • Kenji Fujii

摘要

Incremental pseudo-multi impulse analysis (ICPMIA) is a parametric analysis method for evaluating the nonlinear response of a structure that performs a critical pseudo-multi impulse analysis considering various pulse velocities. In this analysis, the number of impulsive inputs (Np) is a key parameter. In this study, the suitable Np to represent the response of reinforced concrete (RC) moment-resisting frame (MRF) models subjected to near-fault earthquake ground motions is investigated in the following manner. First, a nonlinear time history analysis (NTHA) of the RC MRF models is performed using the velocity pulse model proposed by Mavroeidis and Papageorgiou (2003). Then, the ICPMIA of the RC MRF models is performed considering various Np and is compared with the NTHA results. The Np evaluation is based on the relationship between the equivalent velocity of the maximum momentary input energy and that of the cumulative input energy. The severest responses obtained from the NTHA results are also compared with those obtained from the ICPMIA results.