高层建筑中悬臂钢桁架的分析与设计

ANALYSIS AND DESIGN OF STEEL OUTRIGGER FOR HIGH-RISE BUILDINGS

主要分析了某综合开发区主塔楼悬臂钢桁架的传力机理及其对结构抗侧移刚度的影响;探讨了钢与混凝土共同作用的悬臂钢桁架核心筒加强区的分析和设计方法。分析表明,钢悬臂的刚度与传入边柱的轴力存在渐进曲线关系;同时,悬臂钢桁架在考虑了核心筒加强区钢构件与混凝土共同作用后,由于合理利用了混凝土的刚度和混凝土对钢构件的握裹作用,可节省埋入核心筒加强区的钢用量,其分析与设计方法是值得借鉴的。

According to an engineering project, the steel outrigger with concrete core is studied. In steel outrigger, the steel arm and core wall embedded with steel outrigger elements are analyzed individually. The results show that the stiffness of lateral deformation resistance is affected greatly by both steel arm and core wall within the outrigger zone. The reasonable design results of the steel arm can be pursued due to the relationship between the steel arm and the axial force that is transferred into the mega column. On the other hand, taking the stiffness of the concrete core wall into consideration can reduce the embedded member size for the steel outrigger.