斜靠式梁拱组合体系桥梁吊杆张拉力的确定与调整

Determination and Adjustment of the Suspender Tension in Combinatorial Bridges with Beam and Leaning Arch

斜靠式拱桥是由竖直主拱、斜拱和系梁组成的高次超静定结构,可以通过改变吊杆的内力来调整拱和梁的内力分配,最终影响成桥状态的内力和线型。施工阶段吊杆的张拉会引起内力的重分布、结构的变形以及体系转换。本文讨论了斜靠式梁拱组合体系桥梁成桥状态和施工阶段吊杆力的计算方法与实施方案,并将桥例的计算值与实测值进行了对比。

Leaning arch bridge is a high-order statically indeterminate structure composed of vertical main arch,oblique arch and tie beam.The internal force distribution of arch and beam can be adjusted by changing the internal force of the suspender,which ultimately affects the internal force and line of the bridge.The tension of the suspender during the construction phase will cause the redistribution of internal forces,the deformation of the structure and the conversion of the system.This paper discusses the calculation method and implementation plan of the suspender force of the combinatorial bridges with beam and leaning arch in the completed state and construction phase,and compares the calculated value of the bridge example with the measured value.