国家体育场主结构扭曲箱形构件设计研究  

Design and research of twisted box-sections of the main structure for the National Stadium

作　　者：范重[1] 彭翼[1] 王喆[1] 钱稼茹[2] 赵作周[2] 

机构地区：[1]中国建筑设计研究院,北京100044 [2]清华大学,北京100084

出　　处：《建筑结构学报》2007年第2期97-103,111,共8页Journal of Building Structures

基　　金：国家科技攻关计划课题(2004BA904B01);北京市科技计划课题(H050630210720)

摘　　要：根据国家体育场屋盖结构的构型原则,扭曲箱形构件的轴线保持在同一平面内,可视为由一系列曲率半径不同的弧形曲线构成。扭曲箱形构件受力机理复杂,影响因素较多。在设计中经过大量的计算分析、试验研究与加工工艺研讨,提出设置横向加劲肋的方法,通过在扭曲箱形构件设置内部加劲肋的方式改善扭曲箱形构件的应力分布,有效约束弧形板件的面外变形,增强构件的整体刚度。通过调整板件厚度、加劲肋间距等措施,使实体模型达到与杆件模型强度等效和刚度等效;在确定加劲肋形状时兼顾焊接操作空间、节约材料等方面的因素。According to the configuration principle for the roof structure of the National Stadium, the axes of the twisted boxsections are kept in the same plane, and can be deemed as being composed of a series of arcs in different curvature radiuses. Due to the complicated behavior of the twisted member and many influencing factors, a profusion of finite element analysis, experiments, researches on the fabrication technology are carried out during the design procedure. The method of placing the transverse stiffeners is proposed to improve the stiffness of the members and stress distribution, effectively restrain the out-ofplane deformations of the arc walls. By adjusting the thickness of the inner stiffeners and their intervals, the strength and stiffness of the model by using solid elements can be equivalent to that of the model by using beam element. In addition, the welding space and material cost should be considered when determining the shape of stiffeners.

关 键 词：国家体育场 扭曲箱形构件 几何构型 受力机理 加劲肋 承载力 构件刚度 

分 类 号：TU393.3[建筑科学—结构工程] TU318