摘要
为了全面研究宽幅斜拉桥钢箱加劲梁的空间变形特性,结合某宽幅斜拉桥工程实例,建立主梁节段有限元模型,模拟达到合理成桥状态,分析了在汽车与列车全载作用下,以及汽车与列车偏载作用下对该加劲梁的空间变形影响。研究结果表明:在全载工况的作用下,钢箱梁节段沿纵向悬臂梁端的变形最大,从横向截面来看,挑臂端挠度较两侧外腹板之间的挠度变化更为明显,最大值出现在两侧挑臂端处。在对称荷载作用下,整体变形情况分布趋于对称;在偏载工况的作用下,偏载作用侧近悬臂梁端的挑臂位置变形趋势更为明显。在两种荷载情况下,均可以看出在宽幅钢箱加劲梁带挑臂的结构中,挑臂端的变形最为明显,两侧腹板之间的空间变形不明显。
In order to comprehensively study the spatial deformation characteristics of the steel box stiffening girder of a wide cable-stayed bridge,combined with an engineering example of a wide cable-stayed bridge,a finite element model of the main girder segment is established to simulate a reasonable bridge state.The effect of the spatial deformation of the stiffening beam under the full load of the train and the unbalanced load of the car and the train.The research results show that under the full load condition,the deformation of the steel box girder segment along the longitudinal cantilever beam end is the largest.From the transverse section,the deflection of the cantilever end is more obvious than the deflection between the outer webs on both sides.The maximum value appears at the ends of the arms on both sides.Under symmetrical loads,the overall deformation distribution tends to be symmetrical;under eccentric load conditions,the deformation trend of the arm position near the end of the cantilever beam on the side of the eccentric load is more obvious.In both load cases,it can be seen that in the structure of the wide steel box stiffened beam with arm arms,the deformation of the arm ends is the most obvious,and the space between the webs on both sides is not obvious.
出处
《科技创新与应用》
2021年第30期52-55,共4页
Technology Innovation and Application
关键词
斜拉桥
钢箱梁
有限元模型
空间变形
竖向位移
cable-stayed bridge
steel box girder
finite element model
spatial deformation
vertical displacement
