波形钢腹板箱梁桥面板横向内力计算方法

Calculation Method of Transverse Internal Force in Bridge Deck of Box Girder with Corrugated Steel Webs

摘要:

通过静力试验，对单箱双室波形钢腹板缩尺试验梁的桥面板横向受力特点和箱梁框架变形进行分析.结合试验结果和波形钢腹板箱梁的力学特点，提出了一种刚架模型，并将波形钢腹板箱梁桥面板的横向内力计算结果与传统箱梁框架模型和公路桥规中的简支板与连续板模型的横向内力计算结果进行对比.结果表明：刚架模型和箱梁框架模型的计算结果与试验值较为吻合，误差均在10%以内；简支板与连续板模型的计算结果则较为保守，与试验值的误差在20%左右；与箱梁框架模型相比，刚架模型比较简单，并且考虑了波形钢腹板线刚度与混凝土桥面板线刚度比值对混凝土桥面板横向内力的影响.

Abstract:

A singlebox doublecell test girder with corrugated steel webs was made to study the transverseal force and girder frame deformation of bridge deck.In order to calculate the transverse internal force, a rigid frame model was put forward with a combination of test results and mechanical characteristics of corrugated steel box girder. Then, a comparative analysis was made among the method described above and girder frame model and board model of highway bridges. Furthermore, an outcome based on the comparison of the three models and test results was presented. The results of rigid frame model and girder frame model are close to test results, the differences are less than 10%. But board model results are more conservative, the differences are about 20%. Compared to the rigid frame model, the girder frame model is more complicated, and the effects of relative ratios of web line stiffness to deck line stiffness on bridge deck transversal force are considered.