量子创新研究院巨型钢框架-上部悬挂下部支承结构抗连续倒塌分析  

Progressive Collapse Analysis of the Mega Steel Frame Structure with Upper Suspension and Lower Support in the CAS-QIQP Center

作　　者：王静峰[1,2] 卫晓晓 沈奇罕 霍永伦 WANG Jingfeng;WEI Xiaoxiao;SHEN Qihan;HUO Yonglun(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Collaborative Innovation Center for Advanced Steel Structure Technology and Industrialization,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]合肥工业大学安徽省先进钢结构技术与产业化协同创新中心,合肥230009

出　　处：《建筑钢结构进展》2022年第12期103-116,共14页Progress in Steel Building Structures

基　　金：国家自然科学基金(51478158、52108129);教育部新世纪人才支持计划(NCET-12-0838)。

摘　　要：中科院量子创新研究院作为国家级量子科学实验室,对国家抢占量子科技国际竞争和未来发展的制高点至关重要。针对量子创新研究院巨型钢框架-上部悬挂下部支承结构体系开展抗连续倒塌分析,对于明确其结构安全,保障量子研究工作的顺利开展尤为重要。基于拆除构件法以及OpenSees软件,建立了量子创新研究院巨型钢框架-上部悬挂下部支承结构的数值分析模型,通过结构自振周期计算及与框架动力试验对比,验证了模型的准确性。通过考虑桁架层构件应力敏感性特征,合理选取关键构件,对拆除失效工况后的剩余结构进行动力分析,明确了不同工况下结构关键构件的变形和轴力时程曲线,并基于变形与强度破坏准则,对此类巨型钢框架-上部悬挂下部支承结构体系的抗连续倒塌能力进行评估。计算结果表明:量子创新研究院结构冗余度较大,单一构件失效后仍具有较强的抗连续倒塌能力;结构顶部桁架与底部桁架一方作用削弱,另一方作用增强,即采用上部悬挂下部支承形式可以起到双重保险作用。研究成果将为巨型钢框架-上部悬挂下部支承结构的抗连续倒塌分析提供参考依据。The CAS Center for Excellence in Quantum Information and Quantum Physics(CAS-QIQP)is considered as a nationallevel quantum science laboratory,which is vitally essential for China to seize the commanding height in the international competition and future development of quantum science and technology. It is essential to analyze the progress of the collapse resistance of this mega steel frame structure with upper suspension and lower support to ensure its structural safety and the smooth development of quantum research work. This paper establishes a numerical analysis model of the mega steel frame structure with upper suspension and lower support in the CAS-QIQP Center based on alternate path method and Open Sees software. The accuracy of the analytical model is verified by calculating the natural vibration period of the structure and comparing the dynamic test result of the frame. By considering the stress sensitivity characteristics of truss story components,the key components are reasonably selected,and the dynamic analysis of the residual structure under the condition of removing key components is carried out. The deformation and axial force time-history curves of the key members in the structure under different conditions are clarified. The progressive collapse resistance of the mega steel frame structure with upper suspension and lower support is evaluated according to the deformation and strength failure criteria.The results of the calculations show that the mega steel frame structure with upper suspension and lower support in the CAS-QIQP center has a high degree of structural redundancy and still has solid progressive collapse resistance after the failure of a single component. In addition,once one of the trusses at the top and bottom of the structure is weakened,the effect of the other would be enhanced,which means that the form of the upper suspension and lower support can provide a double insurance for the structure. The result may provide a reference for the mega steel structure with a progressive colla

关 键 词：巨型钢框架-上部悬挂下部支承结构 抗连续倒塌 拆除构件法 有限元分析 

分 类 号：TU398[建筑科学—结构工程]