不同边界效应的渡槽地震动破坏模式研究  

Study on Seismic Failure Modes of Aqueduct Under Different Boundary Effects

作　　者：黄万超 王彤彤[2] 张程 刘旭辉 蒋莉 HUANG Wanchao;WANG Tongtong;ZHANG Cheng;LIU Xuhui;JIANG Li(School of Water Conservancy,North China University of Water Resources and Electric Power,Zhengzhou 450046,China;Bureau of South to North Water Transfer of Planning,Designing and Management,Ministry of Water Resources,Beijing 100038,China;Changjiang River Scientific Research Institute of Changjiang Water Resources Commission,Wuhan 430010,China;Key Lab of Basin Water Resources and Eco-Environment Sciences in Hubei Province,Wuhan 430010,China;Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116085,China)

机构地区：[1]华北水利水电大学水利学院,河南郑州450046 [2]水利部南水北调规划设计管理局,北京100038 [3]长江水利委员会长江科学院,湖北武汉430010 [4]流域水资源与生态环境科学湖北省重点实验室,湖北武汉430010 [5]大连理工大学建设工程学部,辽宁大连116085

出　　处：《人民黄河》2023年第7期140-146,共7页Yellow River

基　　金：国家重点研发计划项目(2018YFC0406901);国家自然科学基金资助项目(51979109);河南省重点研发与推广项目(192102310015);河南省科技创新人才计划项目(174200510020);河南省高校科技创新团队支持计划项目(19IRTSTHN030);河南省科技攻关计划项目(162102210074)。

摘　　要：探讨了黏弹性边界和无限元边界理论与方法,就二者边界对波能的吸收效果进行了验证;并结合南水北调某大型渡槽工程实际,建立渡槽-地基-边界耦合高精细化数值模型,引入混凝土塑性损伤本构进行抗震时域分析,研究地震作用下渡槽结构的动态损伤机制。结果表明:两种边界对波动能量的消散均有很好的控制成效;两种边界计算结果规律相似,位移响应在x向差异为11.09%~25.32%;强震响应下渡槽结构的墩帽、墩身及承台与墩身连接处出现不同程度的损伤,在结构设计时应对这些部位着重关注。此外,相比于黏弹性边界,无限元边界设置简便、工作效率高,可为动力计算中边界处理提供参考。The theories and methods of viscoelastic boundary and infinite element boundary were expounded and discussed,and their effects on wave energy absorption were verified.Combined with the practice of a large aqueduct project of South⁃to⁃North Water Transfer Project,a highly refined numerical model of aqueduct foundation boundary coupling was established,and the plastic damage constitutive model of con⁃crete was introduced for seismic time⁃domain analysis to study the dynamic damage mechanism of aqueduct structure under earthquake.The results show that the two boundaries have good control effects on the dissipation of wave energy.The calculated results of the two boundaries are similar,and the difference of displacement response in x direction is 11.09%-25.32%.Under strong earthquake response,the pier cap,pier body and the connection between bearing platform and pier body of aqueduct structure are damaged to varying degrees.Attention should be paid to these parts in structural design.In addition,compared with the viscoelastic boundary,the infinite element boundary is simple and efficient.The IEM boundary can provide a reference for boundary treatment in dynamic calculation.

关 键 词：渡槽结构 黏弹性边界 有限元-无限元耦合边界 塑性损伤本构 动力损伤机制 

分 类 号：TU352[建筑科学—结构工程]