土木分野におけるセンサ技術の利用と可能性(1)

[CS9-01] Vibration Mode Estimation on RC Slab of 2-continuous-span Girder Supported by a Portal Pier with Steel Beam

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

Keywords:Vibration Mode , RC Slab , 2-continuous Span Girder Bridge, Portal Pier with Steel Beam

Vibration modes are expected as promising damage indicators of bridge RC-slab. This report described the trial about vibration mode estimation of real RC slab on the 2-continuous-span girder whose intermediate point is supported by a portal pier with steel beam. As a result, several vibration modes of RS-slab were observed, such as the mode who has 1st deflection shapes in both span, and another mode who has 2nd and 1st deflection shape in first and second span respectively. Additionally, the coupling mode with intermediate pier was also observed. It is concluded that the vibration modes of the RS-slab were successfully estimated.