Sub-domain Early Damage Warning of Railway Bridge in Time-domain
For the reason of railway bridge damage state is relative to the operational train load , combined with the statistical learning theory and the railway bridge damage early warning , sub-domain early damage warning method for railway bridge is proposed based on time -domain dynamic tested data. On the basis of damage sensitivity analysis for bridge structure , the bridge vulnerable location is carried out, and then the sample library of statistic learning theory for early damage warning is constructed. Combinedwith the damage state of vulnerable location , the time sub-domain rich in damage information is extracted from the dynamic response time -history of railway bridge caused by the moving train load ,and the early damage warning in time -domain is investigated at each sub -domain time history. One certain three-span continuous girder railway bridge is taken as casestudy to verify the proposed method. The results show thattheproposed method not only has good recognition ability,but also has good performance to resist the testing noise. The proposed method can be used in the early damage warning for actual railway bridge.
Chunyu FU Deshan SHAN Qiao LI
College of Civil and Transportation Engineering ,Hohai University, Nanjing 210098, China Bridge Engineering Department, Civil Engineering School, Southwest Jiaotong University ,Chengdu 6100
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
575-581
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）