大型钢桁架式渡槽结构地震响应研究  

Study on seismic responses of large steel truss aqueduct structure

作　　者：王勋 汪俊 申瑞婷 邹炎 张宇亭[4] 曲树盛 WANG Xun;WANG Jun;SHEN Ruiting;ZOU Yan;ZHANG Yuting;QU Shusheng(Anhui Provincial Group Limited for Yangtze-to-Huaihe Water Diversion,Hefei 230601,China;Water Transport Planning and Design Co.Ltd.,China Communications Construction Co.Ltd.,Beijing 100007,China;School of Civil Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Tianjin Research Institute for Water Transport Engineering,Ministry of Transport,Tianjin 300456,China)

机构地区：[1]安徽省引江济淮集团有限公司,合肥230601 [2]中交水运规划设计院有限公司,北京100007 [3]华中科技大学土木工程学院,武汉430074 [4]交通运输部天津水运工程科学研究所,天津300456

出　　处：《水道港口》2024年第2期215-223,共9页Journal of Waterway and Harbor

基　　金：中央级公益性科研院所基本科研业务费专项资金资助项目(TKS190203);国家自然科学基金青年基金项目(52308401)。

摘　　要：针对非一致地震激励下大型钢桁架式渡槽结构的隔震响应开展研究,依托实际工程在ABAQUS中建立了渡槽结构的整体有限元模型,给出了非一致激励的输入方法和摩擦摆隔震支座的简化模型,通过试验验证了摩擦摆隔震支座简化模型的准确性,并对一致激励和非一致激励、无隔震支座和有隔震支座的数值模拟结果分别进行了对比。结果表明:中墩正上方的桁杆为渡槽结构的最薄弱位置;非一致激励会显著增大渡槽结构,尤其是边跨的动力响应;在中墩顶部设置摩擦摆隔震支座能起到较好的隔震减震效果,提升桁架结构和槽墩的地震安全性。This paper is focused on the seismic responses of an isolated large steel truss aqueduct structure under non-uniform seismic excitations.A finite element model of the aqueduct structure was established in ABAQUS based on the practical engineering,and the input method of non-uniform excitations and the simplified model of Friction Pendulum Bearing(FPB)were proposed.Moreover,the FPB model was illustrated to be accurate by experiments.Then the results were compared between numerical simulations under uniform and non-uniform excitations,with and without FPBs.The comparisons demonstrated that trusses directly above the mid-piers were the most vulnerable components;non-uniform excitations would significantly increased the dynamic responses of the aqueduct structure,especially at the hemilateral span;the FPBs installed at the top of mid-piers had a rather effective isolation effect,enhancing seismic safety of both trusses and piers.

关 键 词：渡槽结构 非一致激励 摩擦摆隔震支座 抗震设计 

分 类 号：U65[交通运输工程—港口、海岸及近海工程]