铁路桥梁简支梁-拱组合结构拱面外屈曲分析

以某双线桥简支梁—拱组合结构为例,计算了系杆拱在水平推力H作用下发生面外屈曲时H的最小临界值和拱肋面外屈曲时吊杆张力的各向分量,探讨了满足边界条件的能量方程,最后指出由于理论计算未考虑斜撑作用,所以计算出的安全系数偏小。

Analysis on the lateral buckling of the simply supported beam arch combination structure of the railway bridge

Taking the simply supported beam arch combination structure of the double line bridge as an example,the author calculates the lowest critical value of the tied arch under the horizontal force when the lateral buckling of the tied arch has happened and the component of the each direction of the suspender tension when the lateral buckling of the arch rib has happened,discusses the energy equation meeting the boundary conditions,finally points out that the calculated safety factors are smaller because the sprag effect is not considered in the theoretical calculation.