| Title |
Applications of Displacement Response Estimation Algorithm Using Mode Decomposition Technique to Existing Bridges |
| Keywords |
mode decomposition technique;fiber optic bragg-grating(fbg);displacement response estimation;application of existing bridges;모드분해기법;광섬유 브래그 격자센서;변위응답 추정;실교량 적용 |
| Abstract |
Generally, estimations on the displacement as an important factor in evaluating the safety of large structures could be a barometer assessing whether the condition of the structure is deteriorating. Practically, it is not easy how to measure the displacement response to large structures like suspension bridges. In this study, as a method for estimation displacement response from strain signals, mode decomposition technique is proposed. Total displacement response is estimated by superposing quasistatic displacement response and modal displacement responses in dominant modes with larger contributions after estimating the modal displacement responses. If foiled strain gauges are used to measure strain signals, there would likely to generate electric noise, what"s more, the more measuring points there are the more economic burden it could be. In order to solve such problems, fiber optic bragg-grating(FBG) sensors were used, which have multi-point measurements with no effect on electric noises. Therefore, the experiment was performed through dynamic load test of suspension bridge and plate-girder bridge to review the possibility for using mode decomposition technique. |