摘要
基于有限单元法,采用振型分解反应谱法对江坪河水电站溢洪道控制段闸墩的动力特性进行了分析,比较了在分离式模型和整体式模型下的自振频率、位移、应力成果.结果表明:分离式模型的自振频率比整体式模型的稍大;两种模型在地震作用下各个方向的位移峰值相差不大,出现的位置大体一致;两种模型在地震作用下左右闸墩、锚块的应力相差不大.接触模型(锚块底部与相应闸墩顶面按接触状态非线性考虑)是最符合实际情况的,但计算量很大,近似考虑可以用分离式模型代替接触模型.
The stresses and deformations of spillway pier of Jiangpinghe Hydropower Station are analyzed by 3D-FEM. The distribution rules of whole displacement, deformation and stress in important parts of middle pier are obtained. According to the results calculated by FEM, the effects of the prestress acting concrete structures evaluated. Finally, the effect of different interface models between the bottom of anchor block and pier is discussed. It is concluded that： the maximum total displacement happens at the top of middle pier; there is a little great tensile stress at the ear of anchor block, the bottom of door crozes and channel reserva- tion, but the effect zone is small; the effect of the prestress acting concrete structure is good; the stress of channel reservation is partial; the results of separate model and integrity model are similar.
出处
《三峡大学学报（自然科学版）》
CAS
2008年第4期1-4,共4页
Journal of China Three Gorges University：Natural Sciences
关键词
有限元法
反应谱分析
动力特性
江坪河水电站
finite element method
response spectrum analysis
dynamic characteristics
Jiangpinghe Hydropower Station
