摘要
结合一栋49层、高224.8m的超高层混合结构,对比分析了加强层设置方式对混合结构性能的影响。分析结果表明,对于风荷载起控制作用的超高层混合结构宜结合设备层设置多个加强层;加强层刚度越大,内力突变程度越严重;在设置伸臂桁架的同时设置腰桁架对提高框架核心筒结构刚度效果不明显,但能够提高楼层抗剪承载力。
Comparing study for the effect of strengthened story on the behavior of hybrid structures is conducted based on an actual project of 49-storey and 224.8 m high.Six different models are established to study the period and mode,inter-story drift,story shear capacity and inner force of typical structural members.Results show that flexible strengthened stories should be arranged in accordance with mechanical floors as more as possible to enhance the stiffness of the structure,especially for steel-concrete hybrid structure of tall buildings subjected to heavy wind load.The stiffer the strengthened story is,the more serious the mutation of inner forces will be.Belt truss has minor effect on the stiffness of frame-core structure when it is set up with outrigger,while it may be useful in improving the story shear capacity and avoiding the weak story with the increasing height.
出处
《建筑钢结构进展》
北大核心
2013年第3期54-59,共6页
Progress in Steel Building Structures
关键词
高层混合结构
加强层
伸臂桁架
腰桁架
high-rise hybrid structure
strengthened story
outrigger
belt truss
