Evaluation of Load Carrying Capacity of Bridge Using FE Model Updating Based on Ambient Vibration Data
Load carrying capacities of exciting bridges need to be properly assessed for the safe operation and efficient maintenance of bridges. Conventionally, the load carrying capacities of bridges have been evaluated from loading tests with test trucks by measuring static and dynamic responses, such as deflections or strains under known loading conditions. However, it is very hard to carry out loading tests on the expressway bridges with a large amount of traffics, since full or partial block of traffic during the tests may cause not only inconvenience to drivers but also increase of the logistic cost and time. To overcome these difficulties, an alternative method is proposed using ambient acceleration data without traffic control. The proposed method consists of ambient acceleration measurement on a bridge, experimental modal analysis, correction of the initial finite element (FE) model based on the identified modal properties, and estimation of the load carrying capacity using the updated FE model. Field tests were carried out on several bridges on expressways in Korea. The load carrying capacities of the bridges were properly evaluated using their updated FE models.
load carrying capacity ambient vibration test modal identification model updating deflection correction factor
LEE Jong-Jae PARK Young-Soo LEE Chang-Geun CHO Soojin JIN Seung-Sup
Dept.of Civil and Environmental Engineering, Sejong University, Seoul, Korea Structural Division, Korea Expressway Corporation, Hwaseong, Kyunggi, Korea Dept.of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Dae
国际会议
The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)
杭州
英文
1727-1735
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）