曲线钢-混凝土结合梁桥的温度应力

Temperature Stress of Curved Steel-concrete Girder Bridge

基于有限元软件分别对曲线钢-混凝土结合梁桥整体升温25℃和桥面板降温7.5℃进行受力分析。研究在整体升温的温度应力作用下沿桥宽方向桥梁跨中挠度值、桥面板横向位置值、纵向应力值,并给出了整桥的变形云图;降温的温度应力下桥面板沿桥宽方向桥梁跨中挠度值、桥面板横向位置值、混凝土板及钢箱梁底板纵向应力值,同样给出了桥面板及钢箱竖向位移分布云图。通过对曲线钢-混凝土结合梁的有限元分析,说明曲率效应和扭转效应在曲线梁桥计算中是不可忽视的。

The paper did the force analysis for a curved steel-concrete girder bridge, respectively when its whole temperature was 25 ℃ up and its bridge panel was 7.5 ℃ down by using the finite element software to research the midspan deflection, transverse displacement and the longitudinal stress of the decks under the action of being wholly heated. Then the calculating results were given such as bridge deformation nephogram, the middle-span deflection values, transverse displacement values and the longitudinal stress values of the concrete pedal and the bottom plate of steel-box girder, as well as the vertical displacement distribution cloud picture of the decks and the steel-box girder. The analysis re- sults show that the curvature effect and torsion effect can＇t be neglected in the calculation of curved girder bridge.