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.
出处
《水电能源科学》
北大核心
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)
关键词
重力坝
折线
坝轴线
抗震性能
gravity dam
polygonal line
dam axis
seismic resistant behavior
