浩口混凝土重力坝非溢流坝段抗震安全评价  

Earthquake-resistance Safety Evaluation of Non-overflow Section of Haokou Concrete Gravity Dam

作　　者：张腾蛟[1,2] 沈振中[1,2] 梁亮[3] 杨磊[1,2] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [2]河海大学水利水电学院,南京210098 [3]苏州市水利设计研究院有限公司,江苏苏州215004

出　　处：《南水北调与水利科技》2012年第6期18-22,共5页South-to-North Water Transfers and Water Science & Technology

基　　金：国家自然科学基金项目(51179062)

摘　　要：根据浩口水电站工程的实际情况,采用三维有限元法,建立了混凝土重力坝非溢流坝典型坝段的三维有限元模型。在获得坝体静力场的基础上,将动力分析反应谱法计算所得的动力分析结果与大坝在正常蓄水工况下静力分析成果进行叠加,得到大坝在静动力作用下的坝体应力。据此,根据刚体极限平衡原理对大坝进行强度和抗滑稳定性分析和评价。结果表明,大坝在设计地震作用下强度满足规范要求,坝基面抗滑稳定安全系数4.4,大于规范允许最小安全系数。因此,坝体是安全的。According to the actual conditions of Haokou hydropower station, a three-dimensional finite element model was developed for the typical non-overflow section of Haokou concrete gravity darn. Based on the static field of the dam, the dynamic analysis re-sults obtained from the response spectrum method were superimposed with the static analysis results determined by the normal storage of the dam, which provided the dam stress under the static and dynamic forces. The strength and ability against sliding of the dam were analyzed and evaluated using the rigid body limit equilibrium theory. The results demonstrated that the strength of the dam meets the standard requirement under the design earthquake action. The safety factor against sliding the dam founda-tion was 4. 4,which was greater than the minimum safety factor allowed by the standard,and therefore the dam is safe.

关 键 词：混凝土重力坝 三维有限元法 振型分解反应谱法 静动应力叠加 地震响应 强度 抗滑稳定安全系数 

分 类 号：TV642.3[水利工程—水利水电工程]