大跨度开合结构连续倒塌分析及施工过程监测  

Progressive Collapse Analysis and Construction Process Monitoring for Long-Span Retractable Structures

作　　者：华勤春 王秀丽[2] 王康 王进洲 李燕燕 李春龙 HUA Qinchun;WANG Xiuli;WANG Kang;WANG Jinzhou;LI Yanyan;LI Chunlong(Gansu Construction Supervision Co.,Ltd.,Lanzhou 730070,China;Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]甘肃省建设监理有限责任公司,兰州730070 [2]兰州理工大学,兰州730050

出　　处：《工业建筑》2024年第4期90-98,共9页Industrial Construction

基　　金：甘肃省住房和城乡建设厅科技项目(JK2022-01)。

摘　　要：大跨度空间结构作为公共建筑备受关注,一旦发生事故将带来恶劣的舆论和不良的社会影响。以平移式大跨度开合结构作为研究对象,首先,基于敏感性分析找出结构中重要杆件,然后,利用ANSYS/LSDYNA进行结构在重要杆件失效工况下的连续倒塌动力响应分析,最后,对重要杆件和关键点的应力应变、振动和位移等响应进行健康监测。研究结果表明:无论开合屋盖结构是在全闭状态、半开状态还是全开状态下,重要杆件大致分布在轨道主桁架、次桁架附近;无论是单根杆件失效还是多根杆件同时失效,结构都不会由于杆件的失效而引起新的杆件失效。通过对结构施工过程监测发现,在施工过程中,结构整体处在弹性范围以内,且监测结果和数值模拟结果彼此吻合,两者得到很好的验证。Long-span spatial structures as public buildings have attracted much attention.Once an accident occurs,it will bring bad public opinions and adverse social impacts.A translational long-span retractable structure was taken as the research object.Firstly,the important members in the structure were found out based on sensitivity analysis.Then,the dynamic response of the structure under the failure condition of important members was analyzed by ANSYS/LS-DYNA.Finally,the stress-strain,vibration and displacement responses of important members and key points were monitored healthily.The results showed that whether the retractable roof structure was fully-closed,semi-open,or fully-open,the important members were generally distributed near the main truss and the secondary truss.By studying the collapse of the structure under various failure conditions,it was found that no matter whether a single member failed or multiple members failed at the same time,the failure of the structure would not lead to the failure of new members.Through the monitoring of the construction process of the structure,it was found that the overall structure was within the elastic range during the construction process,and the monitoring results were consistent with the numerical simulation results,which were well verified.

关 键 词：大跨度开合结构 重要杆件 连续倒塌 施工监测 

分 类 号：TU312.3[建筑科学—结构工程] TU74