高速铁路大跨提篮拱桥的静力刚度及模型试验研究

Study on Static Stiffness and Model Test of Long-span X-style Tied Arch Bridge in High-speed Railway

以一座高速铁路大跨度钢管混凝土提篮拱桥及其全桥模型试验为工程背景 ,对在分布力、集中力、活载作用下不同吊杆体系以及不同拱肋布置方式的拱桥的变形规律进行了研究和比较分析 ,并且对结构的自振特性进行了研究 ,探讨了吊杆体系和拱肋布置方式对拱桥静力刚度和动力性能的影响。结合全桥模型试验评价了提篮式拱桥的刚度 ,对理论分析的结果进行了验证。

Taking a long-span concrete-filled steel tube arch bridge in high-speed railway and its model test as an engineering background, the deformation regularities of arch bridges with different hanger and arch rib system were studied and compared under the force system when distributed load, concentrated load, living load, eccentric load were working. The characteristics of natural vibration of different-style arch bridges were analyzed. The influence of different hanger and arch rib system on structural stiffness and dynamic performance was also discussed. Verification research was carried out on the basis of integrating outcomes of model test and theoretical analysis.