高层建筑下部重载柱设计

Design of Steel Reinforced Concrete Columns with Bearing Heavy Loads in the Lower of Tall Buildings

高层和超高层建筑下部的重载柱内力巨大.广东粤财大厦53层,柱子的轴力已经达到了144000kN,这时应视轴力大小选用高强混凝土、约束混凝土、钢管混凝土和型钢混凝土或其复合柱.作者介绍了我国规范中这些柱的设计方法,对于目前尚无规范可循的复合柱设计,推荐了一个非线性全过程计算机分析方法.最后,以实用设计软件TBSA为例,探讨了含有此类重载柱的结构整体分析方法.

The axial force of a column in Guangdong Yuecai Edifice is 144 000kN. In this kind of columns,it is necessary to select from high strength concrete, restrained concrete, concrete filled steel tubes, steel reinforced concrete and composite or mixed construction according to the forces. The design methods of the columns with heavy axial loads in Chinese codes are introduced. A nonlinear full range analysis method by computer is recommended to design composite or mixed construction. Lastly, the structural analysis method for these concrete columns is discussed through a example.