中、下承式系杆拱桥因其优美的造型,广泛的适用场合以及良好的经济指标等因素而成为近年来城市桥梁设计方案中优先考虑的桥型之一。文章以一座下承式混凝土提篮拱桥为研究对象,就拱肋内倾角的变化、混凝土弹性模量的变化及横撑布置形式的不同对提篮拱稳定特性的影响进行了研究。所得结果为此类桥梁合理安全的设计提供了一定的参考依据。 The middle and the lower tier tied arch bridge is one of the most preferred bridge types in urban bridge design in recent years because of its graceful shape, wide range of applications and good economic indicators. In this paper, an underfloor concrete arch bridge is taken as the research object. The influence of the variation of arch rib internal inclination, the change of concrete elastic modulus and the arrangement of bracing arrangement on the stability characteristics of basket arch are studied. The results provide a reasonable reference for the design of such bridges.