弧形闸门支铰大梁梁高优化分析

弧形闸门支铰大梁的梁高关系着闸室的稳定和施工经济问题。以某泄洪洞进水塔的弧形闸门支铰大梁梁高优化设计为例,利用ABAQUS有限元计算方法对不同梁高的支铰大梁进行了结构计算和应力分析,研究大梁在弧形闸门推力作用下的变形和其与侧墙交界面上的应力分布情况。结果表明:在考虑山体作用后,梁高为3.5 m的支铰大梁其最大主拉应力已低于混凝土的抗拉强度设计值,在保证支铰大梁结构安全的基础上,兼顾了工程经济效益。可为今后弧形闸门支铰大梁设计提供有效参考。

Optimization analysis of hinged bearing beam height in radial gate

The height of hinged bearing beam in radial gate affects the stability of lock chamber and construction cost. Taking the hinged bearing beam height design of a radial gate in the intake tower of spillway tunnel as a case, the structural calculation and stress analysis of different beam heights are performed by Abaqus. The beam deformation and stress distribution of the interface between side wall and hinged bearing beam are calculated under the thrust force of radial gate. The analysis results show that, with considering the mountain mass action, when the height of beam is 3.5m, the maximum principal stress is lower than the design value of tensile strength of concrete, which can help design optimization to save the engineering cost and guarantee the structural safety. It can provide a reliable reference for the design of hinged bearing beam in other radial gates.