The platform-bridge of attachment self-climbing operation-platform is a latticed member in the bending components, which is a typical space truss structure. There is no non-linear buckling calculating method about such the structure in the present steel structure standard. Therefore, how to obtain the platform-bridge's buckling load becomes the difficulty of the structural design. In view of this, the author utilizes the structure finite element analysis method to carry out buckling simulation analysis of the platform-bridge based on ANSYS, and obtains the load -displacement curves under two extreme load cases, and then obtains buckling patterns and the dual non-linear buckling load successfully. The simulation results show the dual non-linear buckling load of the platform-bridge is larger compared with rated load, and platform-bridge is security and reliable in rated load. The simulation analysis process provides an important guide for the non-linear buckling of similar structural design.%附着式自爬升操作平台的平台桥为格构式受弯构件,是典型的空间桁架结构.针对结构的非线性屈曲的计算困难,为了获得平台桥的屈曲荷载优化结构设计,能获取准确安全载荷,采用结构有限元分析方法,并基于 ANSYS 软件对平台桥结构屈曲仿真分析,得到两种极端工况下的节点荷载一位移曲线,进而成功获得平台桥的屈曲形态及双重非线性屈曲荷载.仿真结果表明平台桥的双重非线性屈曲荷载相比结构的额定荷载较大,在额定荷载下平台桥安全可靠,为结构设计的稳定问题提供了可靠参考.
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