大型双槽渡槽结构地震易损性分析  

Analysis of Seismic Fragility of Large Aqueduct Structures

作　　者：钱玉林 徐一鸣 张春宇 徐建国[1] 张金鹏 刘雪敏 QIAN Yulin;XU Yiming;ZHANG Chunyu;XU Jianguo;ZHANG Jinpeng;LIU Xuemin(College of Water Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;SIPPR Engineering Group Co.,Ltd.,Zhengzhou 450001,China;Henan Puze Expressway Co.,Ltd.,Puyang 457000,China)

机构地区：[1]郑州大学水利科学与工程学院,河南郑州450001 [2]机械工业第六设计研究院有限公司,河南郑州450001 [3]河南濮泽高速公路有限公司,河南濮阳457000

出　　处：《人民黄河》2023年第7期147-151,共5页Yellow River

基　　金：国家自然科学基金面上项目(52079128);河南省科技攻关项目(182102210013,212102310289)。

摘　　要：为评估大型钢筋混凝土渡槽结构的抗震性能,以南水北调中线工程某三跨双槽渡槽为例,基于OpenSees平台中的纤维梁单元创建渡槽有限元模型,同时考虑槽内水位条件的不同以及地震波的随机性,通过增量动力法进行非线性动力时程分析,获得各易损构件的地震响应峰值;采用传统概率地震需求分析方法对数据进行线性回归,进而得到渡槽结构槽墩和支座的地震易损性曲线。研究结果表明:槽内水位变化对渡槽结构的地震响应有较大影响,通过对槽墩与支座开展损伤超越概率分析计算,说明满槽情况下各构件损伤超越概率增长速率最快。In order to evaluate the seismic performance of a large reinforced concrete aqueduct structure,a three⁃span double⁃slot aqueduct of the Middle Route Project of South⁃to⁃North Water Transfer was used as an example to establish a finite element model of the aqueduct struc⁃ture based on the fiber beam element in the OpenSees platform,and a nonlinear dynamic time analysis of the aqueduct structure was per⁃formed by the incremental dynamic analysis method considering the different water level conditions in the aqueduct and the randomness of seismic waves.The peak seismic response of each fragile component was obtained and the traditional probabilistic seismic demand analysis method was used to perform linear regression analysis on the analysis data to obtain the seismic fragility curve of the structural components of the aqueduct.The results of the study show that the change of water level in the trough has a greater influence to the seismic response of the aqueduct structure,and the calculation of damage exceedance probability carried out on the trough pier and support shows that the damage exceedance probability of each member grows at the fastest rate under the full trough condition.

关 键 词：双槽渡槽 地震响应 地震易损性分析 抗震性能 

分 类 号：TV672.3[水利工程—水利水电工程] TV312