摘要
为探索异形钢腹板组合箱梁的扭转变形性能,本文以一个任意的弯曲荷载偏心荷载,将扭转载荷和变形载荷进行等效分解,推导出扭转载荷和变形载荷的计算公式,通过Midas建立了裕溪河大桥模型,在此基础上,分析大桥在偏心荷载下的扭转变形性能。数据显示:异形钢腹板组合箱梁在扭转和变形荷载作用下,控制截面的屈曲应力沿箱梁上的中心线呈反对称分布。在第二种变形荷载加载下,截面屈曲应力呈正对称的分布。对于异形钢腹板组合箱梁在单箱三室的构造下,在第一种变形荷载加载下,截面的最大变形角出现在第二室,在第二种变形荷载加载下,截面的最大变形角出现在第一室。此外,与相同材料和厚度的平钢腹板相比,异形钢腹板组合箱梁的抗扭性能相对较差,抗变形性能相对较好。
To find the torsional deformation of special-shaped steel web composite box girder performance,based on an arbitrary bending load eccentric load,torsion load and deformation load is equivalent decomposed,and calculation formula of the torsion load and deformation load is deduced,the YuXi river bridge model was established by Midas,on this basis,the deformation performance of the bridge under eccentric loading torsion was analyzed.The data show that the buckling stress of the control section presents an anti-symmetric distribution along the center line of the box girder under the action of torsion and deformation load.Under the loading of the second deformation load,the section buckling stress has a positive symmetric distribution.For the composite box girder with special-shaped steel webs under the structure of a single box and three chambers,under the loading of the first deformation load,the maximum deformation angle of the section appears in the second chamber,and under the loading of the second deformation load,the maximum deformation angle of the section appears in the first chamber.In addition,compared with flat steel web of the same material and thickness,the torsion resistance and deformation resistance of special-shaped steel web composite box girder are relatively poor.
出处
《福建建设科技》
2021年第3期62-66,共5页
Fujian Construction Science & Technology
关键词
单箱三室
异形钢腹板
组合箱梁
偏心荷载
扭转变形性能
One box with three chambers
Shaped steel web
Combination box girder
Eccentric load
Torsional deformation property
