大型水电站垫层蜗壳座环结构特性分析  

Structural characteristics of stay ring for spiral case with a membrane in large-scale hydroelectric power plant

作　　者：张启灵[1,2,3] 伍鹤皋[3] 李端有[1,2] 

机构地区：[1]长江科学院,湖北武汉430010 [2]水利部水工程安全与病害防治工程技术研究中心,湖北武汉430010 [3]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《华中科技大学学报（自然科学版）》2011年第8期53-57,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家十一五科技支撑计划资助项目(2008BAB29B06)

摘　　要：为研究蜗壳和外围混凝土联合受力情况下座环的结构特性,结合一实际工程垫层蜗壳结构,采用三维有限元方法,从座环应力、位移和变形以及抗剪性能几个方面分析座环结构的受力特性.结果表明:相比于座环结构强度,其位移和变形更值得重视,垫层变形模量和摩擦系数的大小应该成为座环结构分析的重要考虑因素;座环承受较大的剪力,垫层蜗壳结构设计中不能忽视此问题.In order to analyze the structural characteristics of stay ring on condition that the spiral case and the surrounding concrete jointly resist the internal water pressure,several aspects,including stay ring′s stress,displacement,deformation and shear capability,were studied using three-dimensional finite element method（FEM）,based on a case study of spiral case structure with a membrane.The result shows that great importance should be attached to the stay ring′s displacement and deformation other than its structural strength.The membrane′s deformation modulus and the friction factor both influence the structural characteristics of stay ring greatly.The stay ring resists a great shear,which cannot be ignored in the design of spiral case structure with a membrane.

关 键 词：水电站 垫层蜗壳 座环 抗剪性能 有限元法 

分 类 号：TU271.1[建筑科学—建筑设计及理论] TV731[水利工程—水利水电工程]