碰撞效应对学校建筑抗震韧性的影响  

Ground motion selection method for main-aftershock sequencesbased on conditional spectrum matching

作　　者：白治朋 文勇波 贺秀儒 钟洪星 张晨阳 杜文琪 BAI Zhipeng;WEN Yongbo;HE Xiuru;ZHONG Hongxing;ZHANG Chenyang;DU Wenqi(Three Gorges Jinsha River Yunchuan Hydropower Development Co.,Ltd.,Kunming 650021,China;State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,China)

机构地区：[1]三峡金沙江云川水电开发有限公司,云南昆明650021 [2]武汉大学水资源工程与调度全国重点实验室,湖北武汉430072

出　　处：《世界地震工程》2025年第2期114-124,共11页World Earthquake Engineering

基　　金：西藏自治区科技计划项目资助项目(XZ202402ZY0008);黑龙江省自然科学基金杰出青年基金项目(JQ2022E006)。

摘　　要：相关研究及震害调查表明:相邻结构间的碰撞会加剧结构构件与非结构构件的损失和破坏。为研究这种碰撞效应对建筑抗震韧性的影响,依据《建筑抗震韧性评价标准》(GB/T 38591—2020)对一既有的学校建筑进行抗震性能评估。建立有限元模型,采用Hertz-Damp碰撞模型,选取合适地震动输入,提取相应的工程需求参数,选取合适的结构构件和非结构构件的易损性模型,给出了不考虑碰撞效应与考虑碰撞效应下的建筑性能指标,并对不同工况下的指标进行对比。研究结果表明:3个建筑性能指标在碰撞效应的影响下有所改变,碰撞效应导致长周期和短周期建筑修复费用分别增加30.76%和7.09%;长周期建筑修复时间增加了9.40%,短周期建筑修复时间减少了2.60%;长周期建筑人员伤亡率分别提升了17.0%和20.5%,短周期建筑伤人员伤亡率分别提升了12.0%和8.70%。总的来说,碰撞对长周期建筑的损失加剧效应更加显著。Selecting suitable ground motion records is crucial for seismic structural performance assessment.Existing ground motion selection methods are primarily applicable to single earthquake scenarios and cannot address mainshock-aftershock sequence scenarios.To address this issue,2268 aftershock records were analyzed to investigate the spectral acceleration correlations of aftershocks.Based on the analysis,a predictive model for aftershock spectral acceleration correlation coefficients was proposed.A ground motion selection method for mainshock-aftershock sequences was then developed using the conditional spectrum matching approach.The results demonstrate that the proposed predictive model exhibits low prediction errors,effectively characterizing the correlation trends of aftershock spectral accelerations.The selected ground motion suites satisfy the target response spectrum requirements in terms of mean values,standard deviations,and other metrics,indicating the high accuracy of the proposed method.The ground-motion selection method based on conditional spectrum matching further improves the existing selection framework and provides guidance for dynamic time-history analysis of structures subjected to mainshock-aftershock sequences.

关 键 词：建筑结构 时程反应计算 抗震韧性评估 结构碰撞效应 

分 类 号：P315.3[天文地球—地震学]