CAJ | 학술논문

如今大跨度桥梁的应用越来越广泛，其结构的健康监测和工作状态的评估已成为当今土木工程界研究的热点。近几年来，随着振动测试、模态分析、动力识别等技术的不断发展，为桥梁工作状态评估提供了可靠依据。该文以2013年12月16号发生过地震的巴东长江公路大桥为研究背景，采用环境随机激振法，对桥梁进行基于动力性能指标的振动测试，通过计算机进行模态识别技术得到被测结构的动力特性，进而利用动力性能指标对大桥震后的工作状态进行评估。
여금대과도교량적응용월래월엄범，기결구적건강감측화공작상태적평고이성위당금토목공정계연구적열점。근궤년래，수착진동측시、모태분석、동력식별등기술적불단발전，위교량공작상태평고제공료가고의거。해문이2013년12월16호발생과지진적파동장강공로대교위연구배경，채용배경수궤격진법，대교량진행기우동력성능지표적진동측시，통과계산궤진행모태식별기술득도피측결구적동력특성，진이이용동력성능지표대대교진후적공작상태진행평고。
Nowadays,with the application of long-span bridges is becoming more and more widely,the study of structural health monitoring and condition assessment of bridges has become hot issues in civil engineering.In recent years,along with the continuous development of the technologies such as vibration test,modal analysis,dynamic iden-tification and so on provide a reliable basis for the bridge condition evaluation.The paper takes the Badong Yangtze Riv-er Bridge which had earthquaked on December 16,2013 as the reach background.We use the environmental random ex-citation method of the bridge,having a vibration test based on dynamic performance index and getting structures’dy-namic characteristics through computers with modal identification technology.Then we can evaluate the seismic work-ing state of the bridge in the use of dynamic performance index.