Progressive Collapse Analysis and Construction Process Monitoring for Long-Span Retractable Structures
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.
NETL
NSTL
万方数据
维普
