系杆拱桥合理成桥状态研究分析

Research and Analysis on Reasonable Completion State of Bowstring Arch Bridge

摘要:

系杆拱桥成桥状态的合理与否直接关系到桥梁合理施工阶段的确定及成桥运营阶段的安全。现通过对刚性支承连续梁法、最小弯曲能量法和相对刚度变化法在系杆拱桥合理成桥状态确定中的应用的介绍，并通过某钢管混凝土系杆拱桥工程案例的有限元分析，对比分析了不同计算理论下的吊杆、系杆和拱肋内力和系杆位移状态，结果显示相较于其它两种方法，相对刚度变化法均能实现拱桥结构性能最合理状态。

Abstract:

The rationality of the completed state of bowstring arch bridge is directly related to the determination of the reasonable construction stage of the bridge and the safety of the operation stage of the completed bridge. By introducing the application of rigid supported continuous beam method, the minimum bending energy method and relative stiffness change method in the determination of reasonable completion state of bowstring arch bridge, and through the finite element analysis of a concrete filled steel tube bowstring arch bridge, the internal forces of suspender, tie bar and arch rib, and the displacement state of tie bar under the different calculation theories are compared and analyzed. The results show that compared with the other two methods, the relative stiffness change method can achieve the most reasonable state of arch bridge structural performance.