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Analysis of shear lag effect of great cantilever steel box beam;

大悬臂钢脊骨梁结构模型剪力滞效应探讨

By using the method of finite element,the author tries to offer the tentative analysis of the shear lag effect of cantilever box beam on the horizontal force and bend moment.

以长沙市洪山桥塔梁墩固结节段模型试验为基础 ,应用有限元方法分析大悬臂钢脊骨梁在轴力和弯矩作用下剪力滞效应 ,并进一步研究了轴向力作用下 ,纵向加劲肋、横向加劲肋、横梁、挑梁变化对脊骨梁正应力的变化规律的影响 ,供设计时参

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.

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 ,供设计时参

Based on the calculation and analysis of models with structural parameters such as radius and load position discussed,the rules of longitudinal and transverse stress distribution,the shear lag effect and the variational law with parameters in up supported curved spine beam are educed.

建立了空间块体分析模型 ,通过对曲线脊骨箱梁整体结构的分析和计算 ,考虑曲率半径、作用点位置等参数的影响 ,得出上承式曲线脊骨箱梁在纵、横两个方向上的应力分布状况、剪力滞效应及随相关参数变化的规律 ;并与一般曲线箱梁相比较 ,描述了曲线脊骨箱梁在不同荷载作用下的受力性能 ;通过有机玻璃模型试验验证了计算的正确性。