【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。更多还原

【Abstract】 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 behavior 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.更多还原