A probabilistic-statistical hybrid model for dominant pulses in pulse-like ground motions (PLGMs)

IF 4.2 2区 工程技术 Q1 ENGINEERING, GEOLOGICAL
Yuhe Zou , Xiaoyu Chen , Dongsheng Wang , Lei Tong , Jiancheng Dai , Weijian Tang
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引用次数: 0

Abstract

Pulse-like ground motions (PLGMs) have been shown to significantly amplify the nonlinear seismic demands of structures, critically impacting seismic design and risk assessment. The effective simulation of pulse characteristics in PLGMs is essential for achieving these purposes. In this study, a probabilistic-statistical hybrid model optimized by genetic algorithms is proposed to efficiently simulate the dominant pulses of PLGMs. A comprehensive database consisting of 194 PLGMs from 36 global earthquakes was established, enabling detailed analysis of the correlations between the simulation model parameters and the real pulse in records. By utilizing Mavroeidis’ model, probabilistic-statistical models for the pulse period (Tp) and pulse amplitude (Vp), along with probabilistic distribution models for the wave shape parameter (γ) and phase parameter (φ), were systematically developed. This provides a comprehensive framework for characterizing pulses in PLGMs. Nonlinear structural analysis further demonstrates that the synthetic records generated by the proposed hybrid model effectively reproduce structural responses, enhancing their applicability in seismic design and risk assessment within engineering applications.
类脉冲地震动(PLGMs)中优势脉冲的概率统计混合模型
脉动型地震动(PLGMs)已被证明会显著放大结构的非线性抗震需求,对抗震设计和风险评估产生重大影响。为了达到这些目的,有效地模拟plgm中的脉冲特性是必不可少的。本文提出了一种基于遗传算法优化的概率统计混合模型,以有效地模拟plgm的优势脉冲。建立了一个由36次全球地震的194个PLGMs组成的综合数据库,可以详细分析模拟模型参数与记录中真实脉冲之间的相关性。利用Mavroeidis模型,系统地建立了脉冲周期(Tp)和脉冲幅度(Vp)的概率统计模型,以及波形参数(γ)和相位参数(φ)的概率分布模型。这为plgm中的脉冲特性提供了一个全面的框架。非线性结构分析进一步表明,混合模型生成的综合记录可以有效地再现结构反应,提高了其在工程应用中的抗震设计和风险评估的适用性。
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来源期刊
Soil Dynamics and Earthquake Engineering
Soil Dynamics and Earthquake Engineering 工程技术-地球科学综合
CiteScore
7.50
自引率
15.00%
发文量
446
审稿时长
8 months
期刊介绍: The journal aims to encourage and enhance the role of mechanics and other disciplines as they relate to earthquake engineering by providing opportunities for the publication of the work of applied mathematicians, engineers and other applied scientists involved in solving problems closely related to the field of earthquake engineering and geotechnical earthquake engineering. Emphasis is placed on new concepts and techniques, but case histories will also be published if they enhance the presentation and understanding of new technical concepts.
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