Estimation of Live Load Distribution Factor for a PSC I Girder Bridge in an Ambient Vibration Test

被引:3
|
作者
Kim, Sung-Wan [1 ]
Yun, Da-Woon [1 ]
Park, Dong-Uk [1 ]
Chang, Sung-Jin [1 ]
Park, Jae-Bong [2 ]
机构
[1] Pusan Natl Univ, Seism Res & Test Ctr, 49 Busandaehak Ro, Yangsan 50612, South Korea
[2] Korea Author Land & Infrastruct Safety, Management Off, 24 Ena Ro,128 Beon Gil, Jinju 52856, Gyeongnam, South Korea
来源
APPLIED SCIENCES-BASEL | 2021年 / 11卷 / 22期
基金
新加坡国家研究基金会;
关键词
bridge; ambient vibration test; live load distribution factor; empirical mode decomposition; displacement response; EMPIRICAL MODE DECOMPOSITION; PRESTRESSED CONCRETE; MONITORING-SYSTEM; SENSORS; SLAB;
D O I
10.3390/app112211010
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Maintenance of bridges in use is essential and measuring the live load distribution factor (LLDF) of a bridge to examine bridge integrity and safety is important. A vehicle loading test has been used to measure the LLDF of a bridge. To carry this out on a bridge in use, traffic control is required because loading must be performed at designated positions using vehicles whose details are known. This makes it difficult to measure LLDF. This study proposed a method of estimating the LLDF of a bridge using the vertical displacement response caused by traveling vehicles under ambient vibration conditions in the absence of vehicle control. Since the displacement response measured from a bridge included both static and dynamic components, the static component required for the estimation of LLDF was extracted using empirical mode decomposition (EMD). The vehicle loading and ambient vibration tests were conducted to verify the validity of the proposed method. It was confirmed that the proposed method can effectively estimate the LLDF of a bridge if the vehicle type and driving lane on the bridge are identified in the ambient vibration test.
引用
收藏
页数:15
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