摘要
某拟建抽水蓄能电站上水库大坝采用沥青混凝土面板堆石坝,为分析该大坝的抗震安全性,采用三维非线性有限元法,进行大坝静、动力应力变形分析。结果表明:大坝在静力条件下变形规律符合一般规律,满蓄期坝体水平位移和沉降量极值分别为3.1 cm和40 cm;大坝在校核地震(地震加速度为0.897 g)作用下,坝体及面板的动力反应分布规律合理。坝体顺河向、坝轴向、竖向加速度极值分别为10.649 m/s 2、9.824 m/s 2、11.497 m/s 2,考虑地震作用与静力叠加后,沥青混凝土面板最大拉应变发生在面板与库盆的交接处靠大坝一侧,为0.441%,计算分析其抗震安全性可以保证。
The dam of the reservoir of a proposed pumped storage power station is an asphalt concrete face rockfill dam.In order to analyze the seismic safety the dam,the three-dimensional nonlinear finite element method was used to analyze the static and dynamic stress deformation of the dam.The results of the study show that the deformation law of dam under static conditions conforms to the general law,and the extreme values of horizontal displacement and settlement of the dam body during the period of full storage are 3.1 cm 40 cm,respectively;under the action of the check earthquake(the earthquake acceleration is 0.897 g),the distribution law of the dynamic response of dam body and the panel is reasonable.The extreme values of the acceleration in the along-river direction,the axis direction of the dam and the vertical direction are 10.49 m/s 2,9.824 m/s 2 and 11.497 m/s 2,respectively.After considering the seismic and the static superposition,the maximum tensile strain of the asphalt concrete panel occurs at the junction of the panel and the reservoir basin on the side of the dam,which is 0.441%.The seismic safety can be guaranteed by calculating and analyzing it.
作者
高东红
朱瑞恒
田金波
GAO Donghong;ZHU Ruiheng;TIAN Jinbo(Shanghai Investigation,Design and Research Institute Co.,Ltd.,Shanghai 200434,China)
出处
《水利与建筑工程学报》
2025年第4期226-232,共7页
Journal of Water Resources and Architectural Engineering
基金
水利部重大科技项目(SKS-2022101)。
关键词
抽水蓄能电站
校核地震
沥青混凝土面板堆石坝
强震区
动力反应
pumped storage power station
check earthquake
asphalt concrete face rockfill dam
strong earthquake area
dynamic response
