动力荷载作用下梁桥测试方法分析

211()Vol.21No.120083JOURNALOFSHIJIAZHUANGRAILWAYINSTITUTE(NATURALSCIENCE)Mar.2008(,050081):,,,,:;;:U446.1:A:167420300(2008)0120084203:2007209211:19781,,,,,:30m,1.92m,1.8m;11.8m,2.15m,7.5m,,2,220,2100C50,,1860MPa,YM1524,781.2kN,,,(),,;,,[M][q]+[K][q]=0(1),[M];[K];[q][K]{}=2n[M]{}(2)vk=k(k=1,2,,n),{}={}k(k=1,2,,n),vk,{}k,n,,,,341,1706.9Hz,2,1:85,,,,,[123]DH,11/4,,,PC,1,,20m,,41/4223,,Fourier30t30km/h3330km/h()451/4430km/h()530km/h(1/4)61/430t50km/h78,,,6.32Hz[425]86()21630km/h(1/4)750km/h()850km/h()4,6.32Hz,,,,,,[1],.[M].:,2003.[2],,.[J].,2003,23(2):61267.[3],.[J].,2002,22(3):82290.[4],.[M].:,2001.[5],,.[M].:,2002.AnalysisofTestMethodforBridgeBeamUnderDynamicLoadWangXin(ShijiazhuangHighwayEngineeringQualitySupervisionStation,Shijiazhuang050081,China)Abstract:Adynamic2basedevaluationprocedureofload2carryingcapacityforexistinggirderbridgesispro2posed.Byanalysisofthetestdata,dynamicsignalofthebridgeisacquiredwhichshowstructuraldynamicfea2tureandprovidethebasisforresearchingthechangeofbridgebearingcapacity.Keywords:dynamicload;bridgetest;bridgeengineering()