重力坝三维有限元分析
|
摘要
以三维有限元法为基础,对故县水库重力坝坝体及基础进行结构分析,计算坝体在5种工况下的应力、位移,并对计算结果进行详细分析.指出坝体应力在几种工况下绝大部分处于受压状态,坝踵区出现了应力集中现象;在温度荷载的作用下,坝体发生了较大的变形,温升时坝踵处产生较大的压应力,温降时产生拉应力.由于横缝作用,拉应力值不大;在地震动力荷载作用下,坝体最大动位移出现在坝顶上游侧,在坝踵和坝趾处均出现应力集中.这些结论供同类型的重力坝设计和复核作参考.
On the basis of the three-dimentional FEM,the structures of dam body and foundation are analyzed for the gravity dam of Gu county reservoir and the stress and displacement are caculated under five working conditions,then calculation results are analyzed in details.The results indicate that most of the dam body are in pressed state under these working conditions and the stress concentration appears in the dam heel.The dam body deforms a lot under the temperature load,a greater compressive stress exists in dam heel when the temperature goes up and a greater tensile stress appears when the temperature drops.The tensile stress is small owing to the transverse joint.The maximum dynamic displacement appears on the upstream side of the dam and stress concentrations appear in dam heel and dam toe.These conlclusions could provide reference to design and check the gravity dam.
On the basis of the three-dimentional FEM,the structures of dam body and foundation are analyzed for the gravity dam of Gu county reservoir and the stress and displacement are caculated under five working conditions,then calculation results are analyzed in details.The results indicate that most of the dam body are in pressed state under these working conditions and the stress concentration appears in the dam heel.The dam body deforms a lot under the temperature load,a greater compressive stress exists in dam heel when the temperature goes up and a greater tensile stress appears when the temperature drops.The tensile stress is small owing to the transverse joint.The maximum dynamic displacement appears on the upstream side of the dam and stress concentrations appear in dam heel and dam toe.These conlclusions could provide reference to design and check the gravity dam.
引文
[1]汝乃华.重力坝[M].北京:中国水利水电出版社,1983.
[2]朱伯芳.有限单元法原理和应用[M].北京:中国水利水电出版社,1979.
[3]中华人民共和国原能源部.GB50199-94水利水电工程结构可靠度设计统一标准[S].北京:中国计划出版社,1994.
[4]李皓月.ANSYS工程计算应用教程[M].北京:中国铁道出版社,2003.
[5]任辉启.ANSYS工程分析实例详解[M].北京:人民邮电出版社,2003.
[6]汪家正,阎贵平.基于ANSYS的重力坝地震动力有限元分析[J].华北水利水电学院学报,2006(1):21-23.
[2]朱伯芳.有限单元法原理和应用[M].北京:中国水利水电出版社,1979.
[3]中华人民共和国原能源部.GB50199-94水利水电工程结构可靠度设计统一标准[S].北京:中国计划出版社,1994.
[4]李皓月.ANSYS工程计算应用教程[M].北京:中国铁道出版社,2003.
[5]任辉启.ANSYS工程分析实例详解[M].北京:人民邮电出版社,2003.
[6]汪家正,阎贵平.基于ANSYS的重力坝地震动力有限元分析[J].华北水利水电学院学报,2006(1):21-23.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心