基于分项系数法对拱坝抗滑稳定的分析

在拱坝抗滑稳定计算中,有限元法缺乏与计算方法相配套的稳定度判别标准,计算结果因人而异。通过对极限状态设计表达式变形处理,提出一种新的分项系数有限元方法即有限元强度储备系数法及配套的判别标准,并以某工程为例进行分析。结果表明,用有限元强度储备系数法计算结构的整体安全系数与刚体极限法结果一致,该拱坝拱座稳定、安全。分项系数法采用了5个分项系数,反映了建筑物不同等级、不同设计状况下对稳定性的要求,真实反映了影响拱座稳定的因素,计算更接近实际。

Analysis on Stability Against Sliding of Arch Dam Based on Partiai Coefficient Method

In the computing of the stability against sliding of arch dams,FEM lacks the stability criteria for the computing.Here,a new FEM of partial coefficient,i.e.the finite element strength factor method,and the criteria for it are put forward,and analyzed by taking a certain project for example.The results show that the method adopts five different partial coefficients to reflect the requirements for the stability under the different grades and designs of buildings,and the calculated result by using this method is in agreement with that from the traditional rigid limit equilibrium method.So,it is more suitable for the computing of the stability against sliding of arch dams.