某不规则入口门厅结构设计

Structural design of an irregular entrance lobby

国内异形钢结构日新月异,以上海某项目的入口门厅为工程对象,针对其扭转效应明显、楼板缺失较多、存在较多斜柱及穿层柱和异形屋面等特别不规则的情况,进行了一系列的研究和分析,证明其结构设计的合理性和可实施性。介绍了入口门厅的结构布置和针对不规则情况采取的措施。利用两个不同的软件(YJK,MIDAS Gen)进了小震弹性对比分析,并进行了关键构件的中震验算;对整体结构进行了弹性时程分析和静力弹塑性分析;对楼板进行了小震弹性和中震不屈服分析;利用ANSYS有限元软件对异形屋面系统进行了极限承载力分析。上述分析有效地保证了结构的整体安全性,为类似工程的结构设计提供参考。

Special-shaped steel structures in China are developed rapidly. Taking the entrance lobby of a project in Shanghai as the engineering object,a series of studies and analyses were carried out in view of the particularly irregular situations such as the obvious torsional effect, lots of missing floor slabs, lots of inclined columns, skip-floor columns and special-shaped roofs,in order to prove the rationality and practicability of the structure design. The structural layout of the entrance lobby and the measures taken for irregular situation were introduced. Two different software( YJK,MIDAS Gen)were used to carry out the comparative analysis of the structural elasticity under frequent earthquakes,and the checking calculation of key components was conducted under fortification earthquakes. The elastic time-history analysis and static elastic-plastic analysis of the whole structure were carried out. The elasticity analysis of the slab was conducted under frequent earthquake and non-yielding analysis of the slab under fortification earthquake was carried out. The ultimate bearing capacity of the special-shaped roof system was carried out by using ANSYS finite element software. The above analysis effectively ensured the overall safety of the structure and provided a reference for the structural design of similar projects.