溢流重力坝三维有限元分析  

Three-dimensional Finite Element Analysis of the Overflow Dam Section in a Gravity Dam

作　　者：吴海林[1] 郑志强[1] 杨中[2] 彭云枫[1] 

机构地区：[1]三峡大学水利与环境学院,湖北宜昌443002 [2]中水淮河规划设计研究有限公司,安徽合肥230601

出　　处：《水电与新能源》2016年第11期1-8,20,共9页Hydropower and New Energy

基　　金：国家自然科学基金面上项目(51379107)

摘　　要：以某重力坝为例,采用三维有限元法,计算溢流坝段在正常蓄水位、设计洪水位、正常蓄水位及地震共同作用三种工况下的应力、位移状况,并对计算结果进行详细分析,计算结果表明:在设计洪水位及考虑闸门关闭情况下,牛腿与闸墩拐角处小片区域混凝土拉应力超过混凝土抗拉强度,应进行适当的配筋计算以保证结构安全;在正常蓄水位遭遇烈度为7度地震的情况下,相较于正常蓄水位,坝体拉应力最大值和范围均有所增大,但没有超过混凝土动态抗拉强度,结构是安全的。The stress and displacement states of the overflow dam section in a gravity dam are analyzed with the three-dimensional finite element method. Three working conditions are considered,i. e. the normal storage water level,the design flood water level,and the joint action of the normal storage water level and the earthquake action. The results show that the concrete tensile stresses in a small area around the corner of the bracket and the pier under the design flood water level and the closed gate condition are higher than the concrete tensile strength,which means reinforcement should be properly calculated and applied to ensure the safety of the structure. In the condition of the normal storage water level combined with a 7-degree earthquake,both of the maximum tensile stress value and range are increased compared to the normal storage water level condition without earthquake. However,the stress is lower than the concrete tensile strength and thus the structure is safe.

关 键 词：重力坝 三维有限元法 应力分析 地震作用 

分 类 号：TV652.11[水利工程—水利水电工程] O241.82[理学—计算数学]