长河坝特高土石坝爆炸动力响应分析  

Dynamic response analysis on explosion at Changheba extra-high earth-rock dam

作　　者：胡良明[1] 杨涛[1] 张志飞 欧阳儒贤 HU Liangming;YANG Tao;ZHANG Zhifei;OUYANG Ruxian(School of Water Science and Engineering,Zhengzhou University,Zhengzhou 450000,China;China Energy Engineering Group Zhejiang Electric Power Design Institute Co.,Ltd,Hangzhou 310000,China)

机构地区：[1]郑州大学水利科学与工程学院,河南郑州450000 [2]中国能源建设浙江省电力设计有限公司,浙江杭州310000

出　　处：《人民长江》2020年第10期173-176,共4页Yangtze River

摘　　要：为研究爆炸荷载作用下特高土石坝的动力响应,基于有限元分析软件Ansys-Workbench,建立了长河坝水电站高土石坝三维有限元实体模型,采用200 t炸药对称布置作为荷载源,重点分析爆炸荷载作用下坝体的位移与应力。研究结果表明:破坏区域在坝体内呈近椭圆形分布,水平方向长度为14.22 m,垂直方向深度为29.96 m,炸点外部区域会产生高达49.5 MPa的拉应力。远离炸点的坝体由于坝体被压实,爆炸影响范围较小。大坝心墙处会出现拉应力和压应力增大的情况,心墙可能因此产生开裂,这在特高土石坝的设计及安全运行管理中应引起足够的重视。In order to study the dynamic response of the extra-high earth-rock dam under explosion load,based on Ansys-Workbench software,we established a three-dimensional finite element solid model for Changheba Hydropower Station.The simulation used 200 tons of symmetric arranged explosive as the load source,and focus on the displacement and stress of the dam under the explosion load.The results showed that the damage area was nearly elliptical in the dam body,with a length of 14.22 m in the horizontal direction and 29.96 m in the vertical direction,and a tensile stress up to 49.5 MPa in the outer area of the explosion point.The dam body far away from the explosion point had a smaller explosion impact range.The tensile stress and compressive stress increased at the core wall,which would induce crack in the core wall,so we should pay attention to the design and safe operation management of extra-high earth-rock dams.

关 键 词：特高土石坝 爆炸荷载 动力响应 数值模拟 长河坝水电站 

分 类 号：TV641[水利工程—水利水电工程]