摘要
曲面摩擦滑移隔震结构(curved surface sliding isolated structure,CSSIS)是一种具有广泛应用潜力的新技术.但在工程实践中,地震波的选取会显著影响CSSIS的抗震设计和风险评估结果.针对缺乏强震记录的情况,提出一个能够反映特定地区地震特征的随机地震动模型,并通过Monte-Carlo模拟算法,评估CSSIS的抗震可靠指标.通过振动台试验和理论分析确定CSSIS力学模型的关键结构参数,采用随机地震动模型生成地震波,以天津宁河地区为例,基于首次超越概率理论,计算了CSSIS的失稳概率Pf.结果表明,地震震级M和震中距D对CSSIS的抗震性能具有显著影响.随着震中距D的增加,上部结构的失稳概率Pf迅速下降;相反,地震震级M的增加会导致Pf升高.所得研究结果将为CSSIS的广泛应用提供重要的设计参考依据.
Curved surface sliding isolated structures(CSSIS)is a new technology with wide application potentials.However,in engineering practice,the selection of seismic waves controls the seismic design and risk assessment of the CSSIS.A stochastic ground motion model that reflects specific earthquake characteristics was proposed,and the seismic reliability of the CSSIS was evaluated via Monte Carlo simulation(MCS).A mechanical model of the CSSIS was established,and the key structural parameters were determined via shaking-table tests and theoretical analysis.A random ground motion was generated using a stochastic method.Considering the Ninghe area in Tianjin as an example,the failure probability Pf of the CSSIS subjected to thefirst excursion criterion was calculated.The results show that earthquake magnitude M and source-to-site distance D significantly influence the seismic reliability of the CSSIS.As D increases,Pf of the superstructure decreases rapidly.Conversely,an increase in the earthquake magnitude M leads to an increase in Pf.The research results will provide an important design reference for the wide spread application of CSSIS.
作者
王长虹
胡世韬
胡宝琳
WANG Changhong;HU Shitao;HU Baolin(School of Mechanics and Engineering Science,Shanghai University,Shanghai 200444,China)
出处
《上海大学学报（自然科学版）》
CAS
CSCD
北大核心
2024年第4期608-621,共14页
Journal of Shanghai University:Natural Science Edition
基金
上海高校特聘教授岗位计划资助项目(TP2018042)
上海市浦江人才计划资助项目(18PJ1403900)。
关键词
曲面摩擦滑移隔震结构
振动台试验
随机地震动模型
敏感性分析
可靠度分析
curved surface sliding isolated structure(CSSIS)
shaking table test
stochastic ground motion model
sensitivity analysis
reliability analysis
