土木分野におけるセンサ技術の利用と可能性(1)

[CS9-02] Vibration Mode Change about Bridge RC-slab of 2-continuous-span Girder at Before and After Repairment

〇Shohei Kinoshita¹, Shigeru Kasai¹, Sakiko Mishima¹, Hideaki Takaku², Satoshi Himoto² (1.NEC Corporation, 2.East Nippon Expressway Company)

Keywords:Vibration mode, RC slab, Repairment, 2-continuous span girder bridge

Vibration modes are expected as promissing damage indicators of bridge RC-slab. It is expected that vibration mode characteristics would change in the case bridge condition gets better. This report describes the study on vibration mode characteristic about bridge RC-slab of 2-continuous-span girder at before and after repairment. As a result, new vibration mode was observed after repairment, and additionally spectrum peak amplitudes of modes changed after repairment. In conclusion, it was indicated that we can evaluate recovery of RC-slab condition by focusing on vibration mode characteristics.