非合成補剛トラス吊橋における床組支承回りの疲労損傷対策

今村 壮宏; 山下 恭敬; 松田 哲夫; 岩崎 雅紀; 永田 淳; 貝沼 重信

doi:10.11532/structcivil.61A.473

Maintenance and Rehabilitation

Countermeasure against fatigue cracks of vertical stiffener with the floor frame support in the non-composite stiffening trusses suspension bridge

Takehiro Imamura, Yasutaka Yamashita, Tetsuo Matsuda, Masanori Iwasaki, Jun Nagata, Shigenobu Kainuma

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Keywords: non-composite stiffening trusses suspension bridge, floor frame, fatigue damage, line bearing, stress measurement, FE analysis

JOURNAL FREE ACCESS

2015 Volume 61A Pages 473-485

DOI https://doi.org/10.11532/structcivil.61A.473

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Abstract

The fatigue damages have been appeared both the rib plates and vertical stiffeners near the floor frame support on the non-composite stiffening trusses suspension bridge after around 30 years of service. In order to investigate the cause of fatigue damages and to propose the repair methods, both the field measurement and FE analysis have been performed. As the results, the cause of the fatigue damages is that the sliding function of the line bearings is disappeared due to corrosion, and the deteriorated line bearings should be replaced to new ones.

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