某高层双塔钢结构设计难点分析

Analysis of a Double-tower Steel Structural Design Difficulties

某商务中心为高层双塔钢结构建筑,东塔为钢框架支撑结构,西塔为钢框架结构,东、西塔在13、14层悬挑14.5 m桁架形成空中走廊。针对结构的特点,简要介绍了基础和地下室设计,重点叙述了上部结构设计中的难点:楼板温度应力、穿层柱计算长度取值、异形钢柱的分析和P-△效应的影响。计算分析结果表明结构设计满足结构的安全性要求。

A Business Center is a double-tower steel building. The east tower is a steel braced frame structure and the west tower is a steel frame structure. The east and west tower have a candilever truss with 14.5 m long at 13 th and 14 th floor which formed an air corridor. In view of the structural characteristics,the design of foundation and basement is briefly introduced,the difficulties in the design of superstructure are discussed in detail：the temperature stress of the floor,the effective length of the skip-floor column,the analysis of the special-shaped column and the P-△ effect influence on the structure. The analysis results indicate that the design of the structure can satisfy the requirements of structural safety.