加强层对筒中筒结构受力性能的影响研究  

Influence of the reinforced layers position on the spatial stress performance of tube-in-tube structures

作　　者：吕炜磊 陈伯望 刘建文 刘陈诚 Lv Weilei;Chen Boivang;Liu Jianwen;Liu Chencheng(Central South University of Forestry and Technology, Changsha 410000, China;Hunan Provincial Architectural Design Institute, Changsha 410000, China)

机构地区：[1]中南林业科技大学土木工程学院,湖南长沙410000 [2]湖南省建筑设计院有限公司,湖南长沙410000

出　　处：《建筑科学》2019年第7期137-141,共5页Building Science

摘　　要：随着建筑高度的不断增大,建筑高度与结构刚度之间的矛盾愈发激烈,筒中筒结构及带加强层的筒中筒结构因此而产生。本文基于某实际工程若干模型的有限元分析,探讨了加强层的刚度、位置、数量等的改变对筒中筒结构空间受力的影响。结果表明,加强层的合理设置,可以有效地改善结构的剪力滞后效应,使得结构内力朝着有利的方向进行重分布;对于减少结构侧移而言,在筒中筒结构中设置加强层效果明显不如框架-核心筒结构,在筒中筒结构设置水平刚臂的基础上再设置外框圈梁的作用也不如框架核心筒结构显著;加强层的刚度不宜过大,否则容易使得结构产生薄弱层,不利于结构抗震;当沿着结构高度均匀设置加强层时,可以不考虑加强层的最优位置。基于研究结论,提出筒中筒结构设置加强层的建议。As the building height increases, the contradiction between the building height and the structural stiffness becomes more and more intense.Based on the finite element analysis of some practical engineering models, the influence of the stiffness, position and quantity of the reinforcement layer on the spatial force of the tube-in-tube structure is discussed.The results show that the shear lag effect can be effectively improved and the internal force can be redistributed in a favorable direction. For reducing the lateral displacement of the structure, the effect of strengthening layer in the tube-in-tube structure is not as obvious as that of the frame-core tube structure , and the effect of setting external frame ring beam on the basis of setting horizontal rigid arm in the tube-in-tube structure is also not as significant as that of the frame-core tube structure.The stiffness of the strengthening layer should not be excessive, otherwise it is easy to make the structure produce a weak layer, which is not conducive to the seismic structure;When the reinforcement layer is uniformly set along the height of the structure, the optimal position of the reinforcement layer can be ignored. Based on the research conclusion , the suggestion of strengthening layer in the tube-in-tube structure is put forward.

关 键 词：筒中筒结构 剪力滞后 加强层 影响因素 

分 类 号：TU312[建筑科学—结构工程]