某预应力泄洪排沙闸室有限元分析

Analysis of Finite Element of Prestressed Sluice for Releasing Flood and Discharging Sand

泄洪排沙闸墩的稳定对整体闸室的稳定起决定性作用。通过建立闸室整体三维有限元模型,对某预应力闸室结构和无预应力闸室结构进行模拟计算。计算结果对比分析得出,预应力对该闸室混凝土大梁和闸墩结构的主拉应力有明显减小的效应,这有利于增强结构抵抗拉应力的能力;通过对预应力锚索的敏感性分析,得出不同吨位下的结构应力变化情况。

The stability of pier is definitive for flood discharging and sediment lock chamber. The 3-D FEM model was built to simulate and calcu- late a pre-stressed structure and a non-prestressed structure. The numerical simulation results show that the pre-stressed structure can reduce the principal tensile stress of the beam and the pier effectively, which can enhance the ability of resistance the tension and sensitivity analysis about the pre-stressed anchor cable illustrates the stress change under different loads.