埋入式压力引水钢管静动力响应分析  

Static and dynamic response analysis of embedded pressure diversion steel pipe

作　　者：叶琦 刘智 YE Qi;LIU Zhi(Jiangxi Provincial Ganfu Plain Hydraulic Engineering Administration,Nanchang Jiangxi,330096,China;Jiangxi Academy of Water Science and Engineering,Nanchang Jiangxi,330029,China;Jiangxi Provincial Technology Innovation Center for Ecological Water Engineering in Poyang Lake Basin,Nanchang Jiangxi,330029,China)

机构地区：[1]江西省赣抚平原水利工程管理局,江西南昌330096 [2]江西省水利科学院,江西南昌330029 [3]江西省鄱阳湖流域生态水利技术创新中心,江西南昌330029

出　　处：《江西水利科技》2023年第6期404-408,共5页Jiangxi Hydraulic Science & Technology

摘　　要：选取西南地区某Ⅰ等大(1)型水利工程碾压混凝土重力坝埋入式压力引水钢管作为研究对象,在常规静力分析的基础上,通过振型分解反应谱法分析坝体内埋入式压力引水钢管在场地谱设计地震作用下的动力响应情况。计算结果表明:常规静力作用下引水钢管的位移及应力均较小,压力引水钢管能够保证良好的工作性状,但在地震作用下,坝体进水口、阀室顶部和压力引水钢管转弯及岔管接头处均存在较为明显的应力集中现象,最不利静动荷载叠加时这些区域附近的混凝土材料将有小范围超过其抗拉强度,需在这些区域开展针对性的加强措施,以保障工程安全运行。The embedded penstock of roller compacted concrete gravity dam in a type(1)large water conservancy project in southwest China is selected as the research object.Based on the conventional static analysis,the dynamic response of the embedded penstock in the dam under the earthquake of site spectrum design is analyzed by the mode decomposition response spectrum method.The calculation results show that the displacement and stress of the diversion steel pipe are small under the action of conventional static force,and the pressure diversion steel pipe can ensure good working performance.However,under the action of earthquake,there are obvious stress concentration phenomena at the inlet of the dam,the top of the valve chamber,the turning of the pressure diversion steel pipe and the joint of the bifurcated pipe.When the most unfavorable static and dynamic loads are superimposed,the concrete materials near these areas will exceed their tensile strength in a small range.It is necessary to carry out targeted strengthening measures in these areas to ensure the safe operation of the project.

关 键 词：重力坝 压力钢管 反应谱法 动力响应 抗震分析 

分 类 号：TV312[水利工程—水工结构工程] TV314