Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

Yazarlar: Fatma ÜLKER PEKER, Ragıp İNCE

Konular:İnşaat Mühendisliği

DOI:10.28948/ngumuh.633567

Anahtar Kelimeler:Steel bridge,Composite girder,Fatigue,Fatigue analysis

Özet: Fatigue is an important design state affecting the safety of the structure. Due to the cyclical effect of vehicle load, fatigue-induced structural cracks occur in the connection details of steel girders. If the necessary measures are not taken against these cracks; the cracks grow and as a result the structural elements become unstable, it can not carry the internal forces and lose their function. The AASHTO Bridge Design Specification classifies fatigue as load- dependent and distortion-dependent in steel girder bridges and in order to ensure fatigue safety, it is aimed to prevent or minimize the formation of cracks in structural elements. In load-induced fatigue investigation; load and stress limits are taken into account in structural elements to prevent fatigue cracks and fatigue safety is checked for the appropriate connection detail category. In this study, a three-span steel girder bridge was analyzed under fatigue loads with CSiBridge package program. In the analysis, fatigue design properties of AASHTO Specification were used. According to the results of the analysis, it has been proved that the structure is safe from fatigue considering the appropriate fatigue category.

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