在调查和检测了某预应力混凝土斜交连续梁桥病害的基础上,针对斜交桥的受力特性,建立空间杆系梁格有限元模型,并依据原设计1985版规范和2004版新桥规两个版本的规范体系,分别对原结构进行验算,并对原桥承载能力进行评定;然后采用梁格模型和实体模型模拟基础变位对结构的影响,研究了基础变位对结构的影响及分析裂缝的形成原因。 Based on the investigation and testing of the prestressed concrete skewed continuous girder bridge disease, the finite element model of the space beam system is established according to the stress characteristics of the skewed bridge. Based on the 1985 version of the original design and the Xinqiao The two versions of the standard system, respectively, the original structure of the inspection, and the carrying capacity of the original bridge assessment; and then using the beam model and solid model to simulate the impact of the basic deformation on the structure, the basic displacement of the structure of the study And analyze the reasons for the formation of cracks.