某水电站垫层蜗壳结构受力特性研究  

Study on mechanical characteristics of cushion spiral case structure in a hydropower station

作　　者：刘明华 洪佳敏 倪绍虎 吕慷 郑海圣 LIU Minghua;HONG Jiamin;NI Shaohu;LV Kang;ZHENG Haisheng(PowerChina Huadong Engi⁃neering Corporation Limited)

机构地区：[1]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122

出　　处：《大坝与安全》2020年第2期42-45,共4页Dam & Safety

基　　金：浙江省自然科学基金资助项目(LY13E090003);国家自然科学基金资助项目(51409265)。

摘　　要：垫层蜗壳是大型水电站厂房蜗壳的常用结构型式。运用三维有限元分析方法对某水电站垫层蜗壳结构的受力特性进行研究,分析比较了承载能力极限状态与正常使用极限状态下正常运行时钢蜗壳的应力状态、钢筋混凝土的开裂范围与应力分布规律。分析成果验证了蜗壳型式选取的合理性,并为蜗壳外包混凝土配筋设计提供了参考。Cushion spiral case structure is commonly used in the powerhouses of large-scale hydropower stations.In this study,the three-dimensional finite element method is used to analyze the mechanical characteristics of cushion spiral case structure of a hydropower station.The stress state of the steel spiral case,as well as the cracking range and stress distribution of the reinforced concrete during normal operation under ultimate limit state and serviceable limit state are analyzed and compared.The analysis results have verified the rationality of the selection of spiral case type and provided a reference for the reinforcement design of surrounding concrete of the spiral case.

关 键 词：水电站 垫层蜗壳 有限元计算 结构设计 

分 类 号：TV731[水利工程—水利水电工程] TV741