某岔管系统及镇墩应力配筋三维有限元计算分析

Three Dimensional Finite Element Analysis of Stress Reinforcement for A Bifurcated Pipe System and Anchor Block

通过ANSYS结构分析对某岔管系统及镇墩应力配筋进行三维有限元计算,计算1#岔管段和2#岔管段在正常运行工况和水压试验工况下,岔管钢材膜应力区和局部应力区最大Mises应力是否满足钢材允许应力要求。有限元计算中,钢管和镇墩钢筋混凝土按线弹性考虑,镇墩钢筋混凝土与钢管之间的初始环向缝隙按荷载分解的方法来解决,由钢管、混凝土及钢筋共同承担。选取镇墩结构中典型截面进行应力、配筋及裂缝分析。计算结果反应了岔管系统及镇墩的受力状态,为设计提供了依据。

Based on ANSYS structural analysis, the three-dimensional finite element calculation of stress reinforcement for a bifurcation system and anchor block is carried out, the purpose is judge whether the maximum Mises stress in the membrane stress zone of steel lining and local stress zone of 1 " bifurcation section and 2" bifurcation section meets the allowable stress requirement of steel under the normal operation and hydrostatic test conditions. In the finite element calculation,the steel pipe and the reinforced concrete of anchor block are considered as linear elasticity, and the initial circumferential joint between the reinforced concrete of anchor block and the steel pipe is solved by load decomposition method, which is born by the steel pipe, concrete and steel bar. Typical sections of the anchor block structure are selected for stress, reinforcement and joint analysis, the calculation results reflect the stress state of the bifurcated pipe system and the anchor block, which provides a basis for the design.