铁路钢-混凝土组合桁架外接式节点力学特性研究

以新建西安至平凉铁路1-80 m组合桁架为工程背景,对外接式钢-混凝土组合节点进行非线性分析,根据理论分析结果,进行节点试件的加载试验。通过这种理论计算与试验相互验证的方法,深入研究外接式节点的承载能力、破坏形式等力学特性。分析结果表明:该类型钢-混凝土组合节点能够满足工程要求;理论计算结果与试验吻合很好,理论计算可用于指导设计,并且计算结果满足工程精度要求。

Research on Mechanical Characteristics of Steel-Concrete Composite Truss Joints Railway Bridge

With reference to the 1-80 m Xi'an-to-Pingliang Railway composite truss engineering project and based on the external-nonlinear analysis of steel-concrete composite nodes,load tests are conducted on specimens of the node according to the analysis result. Using the method of mutual authentication of theoretical calculation and experiment, in-depth studies are carried out on external nodes bearing capacity,failure mode and other mechanical properties. Analysis results show that such type of steelconcrete composite joints are qualified to meet the requirements of the project; theoretical calculation results agree well with the experimental findings,theoretical calculations can be used to guide the design,and calculation results meet the strict requirements of the project.