大跨度索支承实腹式门式刚架钢结构的设计分析  

Design and Analysis of Long-span Portal Frame Steel Structures with Prestressed Cable-strut

作　　者：王元清[1] 李久志[1] 石永久[1] 石小敏[1] 陈宏[2] 

机构地区：[1]清华大学结构工程与振动教育部重点实验室,北京100084 [2]清华大学建筑设计研究院,北京100084

出　　处：《建筑科学与工程学报》2008年第4期73-77,共5页Journal of Architecture and Civil Engineering

基　　金：教育部高等学校博士学科点专项科研基金项目(20050003080)

摘　　要：以某72 m跨度的粮食仓库为实例,计算了索支承实腹式门式刚架结构在不同荷载工况作用下的内力及变形分布,并与不同类型的大跨门式刚架分析结果进行了比较,探讨了索支承门式刚架结构的工作原理和设计方法。结果表明:索支承刚架的预应力效果比普通预应力刚架更加明显,更好地改善了刚架的受力性能;在索支承刚架的设计过程中,不可忽略撑杆和钢拉索的变形,必须按几何非线性计算。The distributions of stress and deformation were computed for the portal frame with prestressed cable-strut under various load conditions based on a grain warehouse with 72 m span, and the results were compared with that of different long-span portal frames. The method was developed to analyze the mechanical principle of portal frame with prestressed cable-strut. The results show that the effect of prestress of the portal frame with prestressed cable-strut is more effective than common prestressed frames, and effectively improves the mechanical behavior of portal frames due to deformations of the strut and cable should be considered in the design of portal frame; therefore, the deformations should be computed by geometry nonlinearity.

关 键 词：索支承门式刚架 预应力 大跨度 荷载 变形 

分 类 号：TU393.3[建筑科学—结构工程]