折线形坝轴线重力坝地震动力反应分析  

Seismic Dynamic Response Analysis of Gravity Dam with Polygonal Dam Axis

作　　者：熊堃 高峰[3] 李锐 

机构地区：[1]长江勘测规划设计研究院,湖北武汉430010 [2]国家大坝安全工程技术研究中心,湖北武汉430010 [3]中国水电顾问集团成都勘测设计研究院,四川成都610072 [4]长江岩土工程总公司(武汉),湖北武汉430010

出　　处：《水电能源科学》2012年第7期65-68,共4页Water Resources and Power

基　　金：国家大坝安全工程技术研究中心研发课题基金资助项目(2011NDS021;NDSKFJJ1103);湖北省博士后创新岗位基金资助项目;中国博士后科学基金资助项目(2012M511194)

摘　　要：以某折线形坝轴线碾压混凝土重力坝为工程背景,基于有限元软件ADINA进行重力坝全坝段三维有限元时程动力分析,研究了该重力坝的抗震性能,确定了坝体抗震的薄弱部位。结果表明,该折线布置重力坝的动力反应规律与一般重力坝基本相同,但左岸转折后的岸坡坝段横河向动力反应较大,转折处楔形坝段上游面出现较为显著的坝轴线方向拉应力,应采取一定的抗震措施确保转折处楔形坝段的抗震安全性。Taking a rolled concrete gravity dam with polygonal dam axis for an example, the software ADINA is used to make three-dimensional FEM time-history analysis of full gravity dam in order to study the dam＇s seismic resistant be- havior and seismic weak positions. The results show that the dynamic response laws of the gravity dam with polygonal dam axis are basically the same with general gravity dams; but the longitudinal dynamic response of dam monoliths on left bank appears larger while the upstream of wedge-shaped monolith is obviously tensile in the dam axis direction. Some seismic resistant measures should be taken to improve the seismic safety of the wedge-shaped dam monolith.

关 键 词：重力坝 折线 坝轴线 抗震性能 

分 类 号：TV642.3[水利工程—水利水电工程] TV314