高层斜交网筒结构体系抗侧性能相关影响因素分析  

Effects of related factors on lateral resistance of high-rise diagrid tubular structures

作　　者：张崇厚[1] 赵丰[1] 

机构地区：[1]清华大学,北京100084

出　　处：《土木工程学报》2009年第11期41-46,共6页China Civil Engineering Journal

基　　金：国家自然科学基金(50878116)

摘　　要：提出高层斜交网筒结构体系的基本构成,分析其抗侧性能的相关影响因素。通过弹性反应谱法进行系列模型计算,探讨斜柱角度、相邻主环梁间距、结构高宽比等几何参数以及斜柱与环梁的相对刚度、角柱、杆件连接形式等结构因素对结构抗侧性能的影响。其中,斜柱角度和高宽比是主要影响参数,相邻主环梁间距影响不大;结构最大抗侧刚度对应的斜柱角度往往处在某一区间,随着高宽比的增大,此角度区间整体上移、区间范围变窄,在此区间相邻主环梁间距的影响最小。有无角柱,尤其是杆件连接形式以及斜柱与环梁的相对刚度对结构抗侧性能和受力的影响很小,设置角柱导致一定程度的应力集中。结构设计主要根据高宽比确定斜柱角度,相邻主环梁间距、是否设角柱、杆件连接形式等则由便于施工及建筑效果而定。Components of high-rise diagrid tubular structures were illustrated geometrically and structurally. The sensitivities of the lateral stiffness of this type of structure to related factors were evaluated, including geometric parameters such as angle of diagonals, distance between two adjacent ring beams, and height-to-width ratio, i.e. aspect ratio of the building, along with structural factors such as node connections, comer columns, and relative stiffness between diagonals and ring beams. Elastic response spectrum analysis was carried out for a series of structural models. With increase of the aspect ratio, the optimal angles of the diagonals to maximize the lateral stiffness increase but the range narrows. The angle of the diagonals and the aspect ratio are dominant factors to the lateral stiffness, while less sensitive to the distance between two adjacent ring beams, especially in the region of the optimal angles. Comer columns, particularly node connections and relative stiffness between diagonals and ring beams slightly affect the lateral resistance, and some degree of stress concentration is caused in corner columns. Generally, the angles of the diagonals are determined primarily using the aspect ratio, and other structural and architectural decisions can be made according to architectural consideration and convenience for construction.

关 键 词：斜交网筒结构 抗侧刚度 斜柱角度 高宽比 

分 类 号：TU973.1[建筑科学—结构工程]