我国近期建设的高速铁路大跨度钢桥 - 关键词]高速铁路大跨度桥梁; 钢桁梁结构; 新技术 [gap=525]Key Words: large span high speed railway bridge, steel truss structure, new technolegy
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多层建筑物的钢框架是梁、次梁或桁梁，以及柱子的体系，用以承受结构的全部重力荷载和抵抗风荷及地震力。
The steel framing of a multi-storey building is a system of beams, girders or trusses, and columns, designed to carry all the gravity loads of the structure and to resist wind and earth-quake forces.
根据栓焊钢桁梁的结构特点，提出结构模型的简化计算图式的处理方法。
According to feature of bolted and welded steel truss beam, the reasonable model simplified and calculating method is presented.
通过改变钢桁梁模型桥单元刚度模拟其结构损伤，利用有限元结构动力分析程序对该模型桥在”损伤”前后进行了结构动力分析。
The dynamic behaviors of the model bridge are analyzed with FEM dynamic structural analysis program before and after the model bridge is damaged.
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