Instability monitoring of space grid structures under blizzards
Space grid structures have been widely used as important large-scale public buildings,which are now increasingly applied for railway stations in China,such as Hangzhou East Railway Station.However,in the history,a series of space grid structures collapsed under blizzards,initiating from the sudden buckling of individual members and developing into progressive collapse in seconds.Therefore,the conditions of space grid structures should be timely monitored and reliably assessed under blizzards,such that instability can be detected and emergency response can be made before collapse occurs.To date,many efforts have been made to develop strategies to detect damages(e.g.buckling)in space grid structures.However,detection of existing buckling damage using these strategies may not be efficient to save enough time for emergency response to prevent structural collapse.In this study,two early warning strategies are proposed for instability monitoring of space grid structures based on local/global vibration information,such that an alert will be sent to maintenance crew before buckling occurs.A 2D sample FE model was built,and performance of the proposed strategies were evaluated in numerical simulation.The result shows that the strategies are able to predict and identify dangerous members and hence send early warning of instability in space grid structures before buckling occurs.
space grid structures instability monitoring modal analysis reliability analysis
Y.G.Fu F.Gomez B.F.Spencer
Department of Civil and Environmental Engineering,University of Illinois at Urbana-Champaign,Urbana,IL.,U.S.A.
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
2192-2202
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）