FIELD MEASUREMENT AND FATIGUE ASSESSMENT OF ORTHOTROPIC STEEL DECK WITH ASPHALT PAVEMENT

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  • Iwasaki Masanori
    社団法人 土木学会 株式会社横河ブリッジ 技術本部研究所研究課
  • Nagata Koh
    社団法人 土木学会 株式会社横河ブリッジ 技術本部研究所
  • Nishikawa Takehiro
    社団法人 土木学会 名古屋高速道路公社 工務部 設計課
  • Ojio Tatsuya
    社団法人 土木学会 名古屋大学 大学院工学研究科土木工学専攻博士課程前期課程
  • Yamada Kentaro
    社団法人 土木学会 名古屋大学 大学院工学研究科土木工学専攻

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  • アスファルト舗装が鋼床版の疲労に及ぼす影響
  • アスファルト ホソウ ガ コウショウバン ノ ヒロウ ニ オヨボス エイキョウ

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Description

Field stress measurements were carried out for a typical box girder bridge with orthotropic steel deck both in summer and in winter. The measured stresses in summer, when the temparature of deck plate was over 40 degrees, were similar to the stresses measured after the asphalt pavement was removed. When the temparature was low, the stiffeness of the asphalt pavement seemed to increase, and the measured stresses decreased accordingly. Fatigue assessment of the structual details of the orthotropic steel deck, considering the temparature effect of tha asphalt pavement, revealed that butt-welded trough ribs had little possibility of fatigue cracking. However, longitudinal fillet welds of the trough ribs to the deck plate showed relatively short fatigue life.

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