剪力作用下大型钢箱梁极限承载力研究
发布时间:2018-11-09 07:53
【摘要】:现行GB50017-2003《钢结构设计规范》对焊接箱形截面梁极限承载力规定还比较粗糙,本文考虑材料非线性、几何非线性和箱梁初始缺陷的影响,采用对Nweton-Raphson公式进行修正的弧长增量法求解剪力作用下焊接箱梁极限承载力,并通过模型试验,验证了计算方法的正确性.通过大量的数值模拟仿真计算,归纳总结出了箱形截面梁在剪力作用下稳定极限承载力计算公式.该公式把极限承载力与腹板高厚比、翼板宽厚比直接关联起来,对焊接箱形截面梁稳定极限承载力的计算及设计具有参考价值.
[Abstract]:The current GB50017-2003 Code for Design of Steel structures is still rough for the ultimate bearing capacity of welded box section beams. The effects of material nonlinearity, geometric nonlinearity and initial defects of box girders are considered in this paper. The ultimate bearing capacity of welded box girder under shear force is solved by using the arc length increment method which is modified by Nweton-Raphson formula. The correctness of the calculation method is verified by model test. Through a large number of numerical simulation calculations, the formulas for calculating the stability ultimate bearing capacity of box section beams under shear force are summarized and summarized. The formula directly correlates the ultimate bearing capacity with the ratio of web height to thickness and the ratio of flange width to thickness, which has a reference value for the calculation and design of the ultimate bearing capacity of welded box beam.
【作者单位】: 长安大学道路施工技术与装备教育部重点实验室;山东恒X机械有限公司;山东交通学院;
【分类号】:TU391
本文编号:2319806
[Abstract]:The current GB50017-2003 Code for Design of Steel structures is still rough for the ultimate bearing capacity of welded box section beams. The effects of material nonlinearity, geometric nonlinearity and initial defects of box girders are considered in this paper. The ultimate bearing capacity of welded box girder under shear force is solved by using the arc length increment method which is modified by Nweton-Raphson formula. The correctness of the calculation method is verified by model test. Through a large number of numerical simulation calculations, the formulas for calculating the stability ultimate bearing capacity of box section beams under shear force are summarized and summarized. The formula directly correlates the ultimate bearing capacity with the ratio of web height to thickness and the ratio of flange width to thickness, which has a reference value for the calculation and design of the ultimate bearing capacity of welded box beam.
【作者单位】: 长安大学道路施工技术与装备教育部重点实验室;山东恒X机械有限公司;山东交通学院;
【分类号】:TU391
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