摘要
超高层建筑结构常采用伸臂桁架或环带桁架来提高其自身刚度。结合具体工程项目,通过对框架-核心筒结构设置伸臂桁架或环带桁架加强层数量及位置的研究,分析伸臂桁架和环带桁架提高框架-核心筒结构刚度的效率。分析结果表明,伸臂桁架提高框架-核心筒结构刚度的效率高于环带桁架;当仅设置环带桁架加强层时,环带桁架位于0.7倍结构高度时最为有效,设置于结构高区时提高结构刚度的效率大于设置于结构低区时,随着环带桁架加强层数量增加其对结构刚度的贡献效率快速下降。根据分析结果,最终采用钢管混凝土钢框架-钢筋混凝土核心筒-环带桁架混合结构体系。
Super high-rise building structures usually adopt outriggers or belt members to improve its stiffness. Combined with specific engineering project,the number and location of story with outriggers or belt members of the frame-corewall structure were researched to analyze the efficiency of outriggers and belt members in improving the stiffness of the frame-corewall structure. The analysis results show that efficiency of outriggers in improving stiffness of frame-corewall structure is higher than that of the belt members. When only the storys with belt members is set,it is most effective when the belt members are located at 0. 7 times the height of the structure. The efficiency to improve the structural stiffness is higher for belt members set at higher zone of the structure than the belt members set at lower zone. With the increase of the number of storys with belt members,the contribution efficiency of the story to structural stiffness rapidly declines. According to analysis results,the mixed structural system of steel frame with concrete filled steel tube-reinforced concrete corewall-belt members is adopted.
出处
《建筑结构》
CSCD
北大核心
2016年第8期8-12,共5页
Building Structure
关键词
混合结构
伸臂桁架
环带桁架
加强层
mixed structure
outrigger
belt member
story with outrigger or belt member
