Proceedings of the Korea Concrete Institute Conference (한국콘크리트학회:학술대회논문집)

Korea Concrete Institute (한국콘크리트학회)
권호 표지

Fatigue failure of decks in highway bridge

도로교 RC 바닥판의 피로파괴에 관한 연구

  • 김경찬 (영남대학교 공과대학 토목공학과) ;
  • 사림신장 (일본국 조취대학 공과대학 토목공학과) ;
  • 정상정일 (일본국 조취대학 공과대학 토목공학과) ;
  • 권혁문 (일본국 조취대학 공과대학 토목공학과)
  • Published : 1993.04.01
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Abstract

Possibility of fatigue failure in punching shear of reinforced concrete decks of highway bridges is analytically investigated by applying Matsui et al.'s experimental finding to models of 2-meter span decks designed in compliance with previous and current codes. Decks made of concrete of compressive strength of 240㎏/㎠ showed longer fatigue life than decks made of 210㎏/㎠ concrete at the same Md/U rations ; higher Md/U ratio resulted in linger fatigue life but its effect is insignificant in decks having effective depths of 14 and 15cm. Decks designed to higher load factors as specified by current codes showed longer fatigue life than decks designed to lower load factors specified by previous codes ; yet fatigue failure appeared to occur in both decks within their normal life span, thus indicating need for redefining the minimum deck thickness.

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