大悬臂钢脊骨梁扭转效应分析与试验研究

The Analysis of Torsion of Great Steel Cantilever Box Beam and the Study on the Experiment Concerned

以长沙市洪山大桥塔梁墩固结节段模型试验为基础 ,应用有限元方法分析扭转对大悬臂钢脊骨梁应力的附加影响 ,并进一步研究了在横隔板间距、刚度变化的情况下 ,脊骨梁翘曲正应力及剪应力的变化规律 。

The paper is based on the experiment in the model of Hongshan Bridge in Changsha city.By using the method of finite element,the author tries to offer the tentative analysis of the additional effect on the stress that torsion brings to cantilever box beam.Further study is also given on the regularity of change of stress when space between cross walls or stiffness of cross wall change.All of this can be used as reference in designation.