守口堡胶凝砂砾石坝抗震性能  

Seismic behavior of Shoukoubu hardfill dam

作　　者：张劭华 何蕴龙[1] 孙伟[1] 

机构地区：[1]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：《武汉大学学报（工学版）》2016年第2期193-200,共8页Engineering Journal of Wuhan University

基　　金：长江科学院开放研究基金资助项目(编号:CKWV2014214/KY)

摘　　要：为了研究胶凝砂砾石坝的抗震性能,以我国正在修建的第一座胶凝砂砾石坝永久性工程守口堡工程为例,同时考虑了地基的辐射阻尼效应,采用三维有限元分析方法进行地震动力时程分析.同时,为探讨这种新坝型的特性,将它与同等高度的常规混凝土重力坝进行了对比,分析在地震作用下的动力响应时程分布规律.研究结果表明:胶凝砂砾石坝的地震动力响应动位移、加速度、动应力整体处于较低的水平,对比同等高度重力坝,动力响应水平有明显的降低,体现出了坝体结构型式和材料性能的特点.分析得出,在设计地震烈度作用下,胶凝砂砾石坝具有良好的抗震安全性能.In order to analyze the seismic behavior of hardfill dam,we carried out time-history analysis for the seismic dynamics of Shoukoubu hardfill dam which is the first permanent hardfill project being built in China using 3Dfinite element model and considering foundation radiation damping.Meanwhile,compared with the same height conventional concrete gravity dam,the features of this new kind of dam and the regularity distribution of dynamic response of hardfill dam during earthquake have been summed up.The preliminary results show that the level of dynamic displacement,dynamic acceleration and dynamic stress response are low,compared with the same height gravity dam;they are reduced significantly,so as to reflect the characteristics of hardfill dam structure and material properties.Thus,the hardfill dam is a dam with high seismic safety under the design earthquake.

关 键 词：守口堡胶凝砂砾石坝 常规重力坝 粘弹性边界 流固耦合 动力特性 动力响应 

分 类 号：TV697.2[水利工程—水利水电工程]