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Title |
An Experimental Evaluation on Vibration Serviceability of Existing Bridge by Non-contact Vibration Measurement Method
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Keywords |
진동사용성 ; 비부착식 진동측정장치 ; 진동측정 ; Vibration serviceability ; Non-contact vibration meter ; Vibration measurement |
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Abstract |
In order to evaluate vibration serviceability by means of non-contact vibration meter, serviceability of existing bridge were experimentally evaluated by using laser vibration meter. Test results were analyzed and compared with evaluation results acquired by using accelerometer and LVDT. To testify accuracy of laser vibration meter measured natural frequency were compared with that acquired by using accelerometer. According to test and comparison results it is showed that serviceability can be evaluated properly enough from the tolerance curve of Reiher-Meister for the estimated acceleration that can be calculated by the numerical differentiation of measured velocity. But because of cumulative numerical error occurred during integration of measured velocity in the time domain serviceability grade could be different from the result acquired by LVDT.
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