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筒中筒结构是超高层建筑最常用的结构体系之一.筒体结构在水平力的作用下会产生剪力滞后效应,使柱的正应力分布不均匀,严重影响结构的空间整体性和受力均匀性.本文介绍一种新型的空间钢网格盒式“筒中筒”混合结构,并以一简化模型为例,引入剪力滞后系数对其剪力滞后效应进行分析,研究剪力滞后横向与纵向的分布情况,与常规筒中筒结构进行对比,并讨论墙架设置、角柱刚度对新结构体系剪力滞后效应的影响.
Cylinder tube structure is one of the most commonly used structural systems in super high-rise buildings.The cylinder structure will produce the effect of shear lag under the action of horizontal force, so that the normal stress distribution of the column is not uniform, which will seriously affect the spatial integrity and force of the structure Uniformity.In this paper, a new type of steel mesh box-type “tube-in-tube” hybrid structure is introduced. Taking a simplified model as an example, the effect of shear lag is analyzed by introducing the shear lag coefficient, The horizontal and vertical distributions are compared with those of the conventional tube. The influence of the wall frame setting and corner column stiffness on the shear lag effect of the new structure system is also discussed.