| Title |
Fatigue Reliability Evaluation of an In-service Steel Bridge Using Field Measurement Data |
| Authors |
이상현(Lee, Sang Hyeon) ; 안이삭(An, Lee-Sak) ; 박연철(Park, Yeun Chul) ; 김호경(Kim, Ho-Kyung) |
| DOI |
https://doi.org/10.12652/Ksce.2022.42.5.0599 |
| Keywords |
피로신뢰도평가; 현장계측데이터; 변형률계측; BWIM; 유한요소해석 Fatigue reliability evaluation; Field measurement data; Strain measurement; BWIM; Finite element analysis |
| Abstract |
Strain gauges and the bridge weigh-in-motion (BWIM) method are the representative field measurement methods used for fatigue evaluationsof a steel bridge-in-service. For a fatigue reliability evaluation to assess fatigue damage accumulation, the effective stress range and the number of stress cycles applied as the fatigue details can be estimated based on the AASHTO Manual for Bridge Evaluations with the field measurement data of the target bridge. However, the procedure for estimating the effective stress range and the stress cycles from field measurement data has not been explicitly presented. Furthermore, studies that quantitatively compare differences in fatigue evaluation results according to the field measurement data type or processing method used are still insufficient. Here, a fatigue reliability evaluation is conducted using strain and BWIM data that are measured simultaneously. A frame model and a shell-solid model were generated to examine the effect of the accuracy of the structural analysis model when using BWIM data. Also, two methods of handling BWIM data when estimating the effective stress range and average daily cycles are defined. As a result, differences in evaluation results according to the type of field measurement data used, the accuracy of the structural analysis model, and the data handling method could be quantitatively confirmed. |