上海外滩中信城Ⅰ期塔楼结构优化设计

本文对上海外滩中信城Ⅰ期塔楼的结构设计方案进行了优化。通过调整核心简墙体厚度、柱位布置，将钢骨混凝土柱改为钢管混凝土柱，调整伸臂桁架加强层等措施，获得了很好的效果。减轻结构自重的同时，也减小了地震作用，结构刚度变化更为和顺，延性提高，还增加了使用空间。与原设计相比，节约混凝土约1．27万m^2、钢材825t，减少桩75根，增加有效使用面积约1800m^2，带来的经济效益约合人民币5000万元。

Optimization Design of Zhongxin City Tower Located in Bund of Shanghai

The optimization of the structural design of Zhongxin City Tower located in Bund of Shanghai is presented in this paper. The optimized design is more efficient than the original design by adjusting the thickness of the concretes shear walls for structural tube-core,column allocation,replacing the R.C. columns with CFT columns,and optimizing the outrigger system. The structural weight is reduced,thus reduce the earthquake action accordingly. The variation of lateral stiffness throngh the height of the building becomes more smoothly,and the ductility of the structure is increased. Moreover,the usable floor area is increased. Compared to the original design,the optimized structure saves 12,000m3 of concrete,825 tons of steel,75 piles,and gets 1800m2 additional usable floor areas. The comprehensive economic effect amounts 50 million RMB.