白鹤滩特高拱坝地震响应等效应力分析

Equivalent Stress Analysis of Seismic Response of Baihetan High Arch Dam

为分析强地震区白鹤滩特高拱坝地震响应下的等效应力,基于大型有限元分析软件ABAQUS,建立了白鹤滩特高拱坝三维有限元模型,模拟地震荷载作用下特高拱坝的动力响应,并利用材料力学方法求解相应等效应力。结果表明,等效应力法可有效降低模拟中坝体的应力集中现象,适量减少横缝可降低坝踵处的拉应力和坝址处的压应力,以提高拱坝稳定性。

In order to analyze the equivalent stress under seismic response in a strong earthquake area,based on the large scale finite element analysis software ABAQUS, a three dimensional finite element model of the Baihetan ultra high arch dam was established. Then the dynamic response of ultra-high arch dam was simulated under earthquake load, and the material mechanics method was used to solve the corresponding equivalent stress. The results show that the equiva- lent stress method can effectively reduce the stress concentration in the dam. Appropriate reduction of transverse joints can reduce the tensile stress at the dam heel and the compressive stress at the dam site to improve the stability of the arch dam.