大悬臂宽钢箱梁支点横梁计算方法分析

Analysis on Calculation Method of Fulcrum Beam for Large Cantilever Wide Steel Box Girder

以大悬臂宽钢箱梁支点横梁作为研究对象,采用板单元整体模型计算支点处顶底板横向应力,并将新规范中有效宽度的计算公式应用到支点横梁隔离体简化模型中;对比板单元整体模型与隔离体简化模型计算结果,结合大悬臂横梁受力特点,对新规范公式的应用进行合理优化。

Based on the study object of the fulcrum beam for a large cantilever wide steel box girder,the plate element overall model is used to calculate the lateral stress of top and bottom plates at the fulcrum,and the calculation formula of effective width in the new standard is applied to the isolated body simplified model of fulcrum beam.The calculation results of the plate element overall model and the isolated body simplified model are compared.Combined with the stress characteristic of large cantilever beam,the application of new standard formula is reasonably optimized.