白鹤滩拱坝三维非线性有限元分析

采用三维非线性有限单元法对白鹤滩拱坝进行了3种荷载组合下的非线性分析。结果表明,在基本荷载组合一工况下,坝体上游面有最大主拉应力为6.04 MPa,发生在坝底550 m高程右拱端,下游面有最大主压应力为14.50 MPa,发生在620 m高程左拱端;坝体自重施加方式对坝体应力,尤其是上游面拉应力,有较大的影响;但在基本荷载组合一工况下,坝体自重按整体自重考虑,上游面最大主拉应力6.04 MPa,有限元等效最大主拉应力为3.15 MPa。

Three-dimensional nonlinear finite element analysis of the Baihetan arch dam

The three-dimensional nonlinear finite element method is used to study the Baihetan arch dam.Three kinds of load combination are analyzed.Under the first condition of basic load combination(Condition One),the maximum principal tensile stress(MPTS) on the upstream face of the dam is 6.04 MPa,occurring at the right arch end at the bottom elevation of 550 m,and the maximum principal compressive stress on the downstream face is 14.50 MPa,occurring at the left arch end at the elevation of 620 m.The exerting way of the dam self-weight influences the dam stresses,especially the tensile stress on the upstream face.Under the Condition One,the dam self-weight is considered as the whole self-weight,and the equivalent MPTS of the finite element on the upstream face is 3.15 MPa.