铝合金桁架梁的结构及动力特性研究

Study on Structural and Dynamic Characteristics of Aluminum Alloy Truss Beams

本文以某铝合金人行天桥为研究对象,介绍了该桥的设计过程及所用铝材的物理力学性质,简化边界条件和节点,运用有限元分析程序Midas/Civil建立铝合金梁空间模型,并进行了各种工况和组合条件下的静动力特性分析。研究结果表明,铝合金桁架梁的强度、刚度及动力性能均满足规范要求,研究结果为国内同类型桥梁的设计与施工提供了参考。

Taking an aluminum alloy pedestrian overpass as the research object, this paper introduces the design process of the bridge and the physical and mechanical properties of the aluminum alloy, and simplifies the boundary conditions and joints. The spatial model of aluminum alloy beam is established by using the finite element analysis program Midas/Civil, and the static and dynamic characteristics of aluminum alloy beam under various working conditions and combination conditions are analyzed. The results show that the strength, stiffness and dynamic performance of aluminum alloy truss beams meet the requirements of the code, and these results provide a reference for the design and construction of the same type of bridges in China.