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Title |
Experimental Verification of Simplified Field Load Test Method on PSC I-girder Bridges
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Authors |
전준창(Jun-Chang Jeon) ; 이희현(Hee-Hyun Lee) ; 유(Hoon Yoo) |
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DOI |
https://doi.org/10.11112/jksmi.2025.29.5.58 |
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Keywords |
검증실험; 단순화된 현장재하실험; 공용내하력; PSC 거더교 Experimental verification; Simplified field load test; Load carrying capacity; PSC I-girder bridges |
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Abstract |
The field load test is an essential procedure for evaluating the load carrying capacity of bridges. However, during the test, public complaints due to traffic closures and safety concerns of workers working at night and high altitude have been pointed out. To address these issues, SISTech and CTC have proposed a simplified field load test method as an alternative. This study aims to assess the validity of the simplified method in terms of analyzing existing detailed safety inspection cases and conducting verification test on PSC I-girder bridge. A total of 20 detailed safety inspection reports for PSC I-girder bridges were employed for analyzing response ratio, impact factor, girder/bearing condition rating, and so on. Based on this analysis, response correction factors were estimated from both the existing and simplified field load test methods and compared. Additionally, the field load test using both the existing and simplified methods were carried out on PSC I-girder bridge to evaluate its load carrying capacity by each method.
The above analysis and test results confirmed that the simplified field load test method can evaluate the load carrying capacity with an acceptable margin of error within approximately 5% in comparison with the existing method.
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