|
Title |
Safety Evaluation of Concrete Bridges for Passage of Crane Vehicle Exceeding Weight Limit
|
|
Authors |
이성재(Sung-Jae Lee) ; 유상선(Sang Seon Yu) ; 박영환(Younghwan Park) ; 백인열(Inyeol Paik) |
|
DOI |
https://doi.org/10.11112/jksmi.2020.24.6.92 |
|
Keywords |
콘크리트 교량 평가; 기중기 차량; 설계 활하중; 분리불가능한 중차량; 신뢰도 분석; 교량 안전성 평가 assessment of concrete bridge; crane vehicle; design live load; overweight indivisible vehicle; reliability analysis; safety evaluation of bridge |
|
Abstract |
It is necessary to develop a rational method for evaluating the safety of bridges for the passage of inseparable crane vehicles exceeding the limit weight. In this study, the same method applied to the development of the recently introduced reliability-based highway bridge design code - limit state design method is applied to the calibration of the live load factor for the crane vehicle. Structural analysis was performed on the concrete bridge and the required strengths of the previous design code, the current design code and AASHTO LRFD were compared. When comparing the unfactored live load effect, the live load of the crane was greater than that of the current and previous design code. When comparing the required strength by applying the calibrated live load factor, the previous design code demands the largest strength and the current design code and the crane live load effect yields similar value. The results of safety evaluation of the actual bridges on the candidate route for the crane passage secured the same reliability as the target reliability index required by the design code and the strength of the cross section of the actual bridge is calculated greater than the required strength for the passage of the crane, which confirms the safety for the passage of the crane.
|