三峡厂房坝段三维静动力分析
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摘要
本文对三峡厂房河床坝段进行三维静、动力有限元分析,着重分析发电孔洞、坝踵、坝趾以及发电管道上下弯道处的应力分布。研究表明,当水库满载运行时,坝踵处产生较大局部拉应力;管道进出口也出现较大局部拉应力。在地震作用下,发电管道进出口和坝踵处由于刚度突变,动力反应相当明显,动应力较大。
The 3-D static and dynamic finite element analysis is conducted for the powerhouse section of the dam of the Three Gorges Project,especially for the stress state at the dam heel,the toe dam, the poper generation outlet and the poper penstock.Research indicates that under full load operation of the reservoir,large local tensile stress will be produced at the dam heel and the outlet and inlet of the power penstock.Under the action of earthquakes,because of the abrupt change of stiffness at the dam heel and the outlet and inlet of the power penstock,the dynamic response is very obvious and the dy- namic stress is large.
The 3-D static and dynamic finite element analysis is conducted for the powerhouse section of the dam of the Three Gorges Project,especially for the stress state at the dam heel,the toe dam, the poper generation outlet and the poper penstock.Research indicates that under full load operation of the reservoir,large local tensile stress will be produced at the dam heel and the outlet and inlet of the power penstock.Under the action of earthquakes,because of the abrupt change of stiffness at the dam heel and the outlet and inlet of the power penstock,the dynamic response is very obvious and the dy- namic stress is large.
引文
1 砼重力坝设计规范(SDJ21-78) .水利电力出版社,1978:16～18
2 敖麟.用有限元单元法计算重力坝时关于地基边界条件的探讨.水利学报,1981(4) :21～25
3 水工建筑物抗震设计规范(SDJ10-78) ,7,25～26
4 王良琛.砼坝地震动力分析.北京:地震出版社,1981:124～125
2 敖麟.用有限元单元法计算重力坝时关于地基边界条件的探讨.水利学报,1981(4) :21～25
3 水工建筑物抗震设计规范(SDJ10-78) ,7,25～26
4 王良琛.砼坝地震动力分析.北京:地震出版社,1981:124～125
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