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Title |
Highway Bridge Inspection Period Based on Risk Assessment
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Authors |
이일근(Il-Keun Lee) ; 김동현(Dong-Hyawn Kim) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2015.19.3.064 |
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Keywords |
위험기반점검 ; 점검주기 ; 고속도로교량 ; 위험도 ; 열화 ; 노출환경 ; 상태 RBI ; Inspection period ; Highway bridge ; Risk ; Deterioration ; Exposure environment ; State rating |
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Abstract |
Risk Based Inspection (RBI) Period was proposed for highway bridges in Korea. Hazard factors affecting bridge condition deterioration were found by analyzing condition data from Highway Bridge Management System (HBMS). Certain level of correlations between those factors and condition deterioration were found. They are used to evaluate hazard score. Summarizing several hazard factors, final hazard is classified as three level;high, moderate, low. Vulnerability is assessed only by the current state of bridge. Then, risk matrix is suggested for inspection periods. Inspection periods of the bridges with grade C, D, and E are maintained the same as before. But, those of grade A and B with moderate and high hazard score are elongated to maximum 6 years while the maximum inspection period is three years at present. By adjusting inspection period according to risk assessment, it was shown that 27% of average inspection manpower can be saved.
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