The Study on Fatigue Design Loads of Steel Highway Bridges

강도로교의 피로설계하중에 관한 연구

  • 김상효 (연세대학교 사회환경시스템공학부) ;
  • 이창용 (포스코개발주식회사)
  • Received : 1997.05.01
  • Published : 1997.06.30

Abstract

Recently, due to the increasing overloaded heavy vehicles and traffic volumes fatigue failures of steel highway bridges frequently occur. Therefore, it is important to decide rational fatigue design procedure which can reflect lifetime cumulative fatigue damage reasonably. In this study, cumulative fatigue damages are simulated for various bridge systems and traffic conditions. The AASHTO LRFD fatigue design procedure is reviewed and the current fatigue design loading format, in which a single representative truck is loaded regardless of bridge width, is found to yield inconsistent safety level. Improved loading format with rational design load level for fatigue design is suggested.

Acknowledgement

Supported by : 한국과학재단

References

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