广州新电视塔细腰段横向水平支撑有效性研究  

Influence of the horizontal bracings on the stability of the exterior steel frame in the waist region of the Guangzhou New TV Tower

作　　者：刘禄宇[1] 郭彦林[1] 王永海[1] 林冰[1] 

机构地区：[1]清华大学,北京100084

出　　处：《土木工程学报》2009年第5期61-68,共8页China Civil Engineering Journal

摘　　要：广州新电视塔采用的是钢结构外框筒和钢筋混凝土核心筒组成的筒中筒结构体系,整个结构外框筒细长、细腰及扭腰。在中部细腰段区域(约160m高度),原结构方案在内外筒之间不设置任何横向水平支撑,这将导致细腰段区域的稳定承载力非常低下。因此,在细腰段设置几道横向水平支撑,使结构既安全又经济便成为一个主要的研究问题。首先应用有限元方法进行风荷载工况下塔体的整体弹性屈曲分析,然后将细腰段作为一个结构单元,考察在设置不同道支撑的条件下细腰段区域外框筒结构的弹性稳定性能和弹塑性稳定承载力,以全面评价横向水平支撑设置的有效性。Abstract： The Guangzhou New TV Tower is composed of an exterior steel frame tube and a concrete tube core. The exterior steel frame is a basic ellipse element, with the plane rotating 45° around the center line from the bottom to the top, and the waist region is slender in the middle. The number of horizontal bracings in the waist region between the exterior steel frame tube and the concrete tube core is determined to ensure a rational design. An overall elastic buckling analysis of the entire structure, as well as an elastic buckling and load-carrying capacity analysis for the waist region as a structural unit, are carried out. The critical buckling load, the ultimate load-carrying capacity and the buckling mode of the waist region for different numbers of the horizontal bracings are compared theoretically for a rational design.

关 键 词：水平支撑 屈曲荷载 稳定极限承载力 

分 类 号：TU391[建筑科学—结构工程] TU375.4