CAJ | 학술논문

为保证现役铁路旧桥梁的安全运行，需定期对其进行检测，对清绿支线黑河3＃桥进行现场动载试验，得到该桥梁结构在列车通过时的动力响应，使用东风4型机车双机连挂以40 km/h的速度从桥上经过来激励桥梁结构，使桥梁上部结构产生响应。分别用DH3817动静态应变采集仪以及DH5938振动测试系统进行数据的采集，分析桥梁结构的动力响应，即动应变、动挠度﹑振动加速度等，同时利用有限元分析软件ANSYS对该桥进行理论模拟分析。通过对试验实测值与理论模拟值进行对比，判断了解其承载力和工作性能，为桥梁的加固与否提供依据，为桥梁的运营、养护和维修提供必要的参考。
위보증현역철로구교량적안전운행，수정기대기진행검측，대청록지선흑하3＃교진행현장동재시험，득도해교량결구재열차통과시적동력향응，사용동풍4형궤차쌍궤련괘이40 km/h적속도종교상경과래격려교량결구，사교량상부결구산생향응。분별용DH3817동정태응변채집의이급DH5938진동측시계통진행수거적채집，분석교량결구적동력향응，즉동응변、동뇨도﹑진동가속도등，동시이용유한원분석연건ANSYS대해교진행이론모의분석。통과대시험실측치여이론모의치진행대비，판단료해기승재력화공작성능，위교량적가고여부제공의거，위교량적운영、양호화유수제공필요적삼고。
In order to ensure the secure operation of the old railway bridge , the bridge should be given regular inpection .In this paper , by conducting on-site load test to the Green branch line , namely the Heihe No .3 of steel-framed bridge, we got the dynamic response of bridge when trains were passing through .In the test, we let DF-IV locomotive with double engines pass through the bridge to activate the bridge's structure at speed of 40km/h. During the test ,DH3817 dynamic and static strain acquisition instrument and DH 5938 vibration test system were used to collect data for purpose of analyzing dynamic response , such as dynamic strain , dynamic deflection , vi-bration acceleration, etc., meanwhile ANSYS was used to simulate theory analysis .After comparing values from experiment and simulation , we can judge working load and capability ,and provide reference for operation , main-tenance and repairment of bridges .