摘要
北京CBD文化设施工程位于北京市朝阳区,采用钢框架-支撑结构,设计难点主要为大跨度、大悬挑及楼板开大洞等。对于体型复杂、结构布置复杂的建筑结构,应采用至少两个不同的力学模型进行结构分析并进行对比。运用大型通用有限元软件ABAQUS建立了此建筑结构的三维模型,进行了结构的动力特性和模态分析,并采用振型分解反应谱分析方法,验算了各项指标,分析了结构在多遇地震作用下的结构响应,并将部分结果与MIDAS/Gen软件计算结果进行了对比。通过对计算结果的分析可以看出,通用有限元软件能够很好地对结构进行分析计算,结构的各项指标均满足要求;建议对局部刚度过小以及抗侧刚度突变的问题予以重视。
Beijing CBD Cultural Center is located in Chaoyang District,Beijing city. It is constructed by using a braced-steel-frame structural system. Challenges of its structure are mainly resulted from long-span,large cantilever and large openings in the floor system. For building which possesses either complex shape or complex structural arrangement,at least two different mechanical models are required for structural analyis and comparisons. The paper presented the details of using ABAQUS to develop a 3D finite element（FE） model for undertaking the elastic analysis of the dynamic characteristics of the building,including modal analysis and response spectrum analysis. The index such as the natural vibration period and drift ratio were examined and compared with the results obtained from MIDAS/Gen. It could be concluded from the FE analysis results that ABAQUS was adequate for the structural analysis. However,it should be noted that the stiffness in local area of the structure was too small and the lateral stiffness of the structure was discontinuous.
作者
李泽霖
王元清
杨蔚彪
常为华
Li Zelin Wang Yuanqing Yang Weibiao Chang Weihua(Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering Tsinghua University, Beijing 100084, China Beijing Institute of Architectural Design, Beijing 100045, China)
出处
《钢结构》
北大核心
2017年第5期46-49,71,共5页
Steel Construction
基金
国家自然科学基金项目(51038006)
