The structural health issues of existing stadiums is a critical and widely discussed issue in the sustainable development of building structures at present.Especially for large-span steel grid structures,studying their vibration response characteristics is of great practical significance for determining the health status of the structure.Real time vibration monitoring was carried out on the steel grid structure of an existing large-span sports hall,by identifying the structural dynamic characteristics parameters such as modal frequency under different working conditions of the steel grid structure,and comparing it with a finite element calculation model considering additional dead loads.This indicates that the measured dynamic characteristics of the structure are in good agreement with the finite element model calculation results,and there is no significant stiffness degradation during the monitoring period.Vibration monitoring has achieved the expected purpose,accurately reflecting the actual vibration situation of the structure,and can be used as a reference for health monitoring of similar large-span steel grid structures.
关键词
大跨度钢网架/动力特性分析/振动监测
Key words
large span steel grid structure/dynamic characteristic analysis/vibration monitoring
维普
万方数据