浦东机场航站楼Y型柱对屋盖整体稳定影响分析  

Effects of Y-shaped columns on overall stability of roof structure for terminal building of Pudong International Airport

作　　者：曾莹[1,2] 罗永峰[1] 沈祖炎[1] 周健[3] 遇瑞[1] 

机构地区：[1]同济大学建筑工程系,上海200092 [2]中国建筑上海设计研究院有限公司,上海200063 [3]华东建筑设计研究院有限公司,上海200002

出　　处：《空间结构》2010年第1期65-70,共6页Spatial Structures

基　　金："浦东机场二期工程航站楼屋盖研究"项目资助(050862)

摘　　要：上海浦东机场二期工程航站楼屋盖为一大跨空间钢结构,整个屋盖结构支承于周边布置的二次分岔箱形变截面Y型钢柱上,该Y型钢柱的受力及变形均非常复杂,本身设计难度很大,同时又是支承整个屋盖结构的关键.本文根据设计要求,建立包括屋盖结构和所有Y型钢柱的整体计算模型,应用有限元软件ANSYS,分析研究屋盖支承Y型钢柱对屋盖结构整体稳定性的影响.分别计算了三种荷载组合下结构的线性、几何非线性、几何材料双非线性整体稳定性.数值计算结果表明,Y型柱相对整个屋盖结构而言具有相对更好的刚度,Y型柱不会先于屋盖结构出现失稳现象;结构的整体稳定性对于初始缺陷较为敏感;构件材料的塑性变形对结构的整体稳定性影响较大.The terminal roof building of Pudong International Airport is a large-span steel structure.The roof is supported by Y-shaped steel columns.The Y-shaped columns have complex loading behaviors,and are difficult to be designed.The Y-shaped columns are also crucial for the whole structure.According to the requirement of the structure designs,and the effects of the Y-shaped columns on the overall stability of the steel roof are analyzed is established by software ANSYS.The linear,geometric nonlinear,and elastic-plastic stability of the structure with geometrical imperfections under 3 different load combinations are computed.The numerical results show that the Y-shaped columns have better stiffness than the steel roof and do not buckle before the roof buckling.The overall stability of the structurs is sensitive to structural imperfections and also affected obviously by the member plastic deformation.

关 键 词：Y型钢柱 大跨空间结构 整体稳定 浦东机场航站楼 

分 类 号：TU393.3[建筑科学—结构工程]