Journal of Al Azhar University Engineering Sector Vol. 11, No. 38, January, 2016, 239-254 COMPARISON BETWEEN DIFFERENT CODES IN CALCULATION OF THE EFFECT OF FATIGUE ON STEEL STRUCTURES N. Mahmoud, F. Salem and M. Mamdouh Structural Eng. Dept., Mansoura University, Mansoura, Egypt ملخص ال: ق واسع فى على نطاً لمستخدمة عالميامختلفة وايم الئج أكواد التصم نتاة بينسة مقارن يهدف البحث إلى درايمية التصم إثناء عملصر معين المسموح به لعنلد الكلمعدنية وإجهاى المنشآت ا علل الك حساب تؤثير حمل. ية التقييم والتىى قد بنيت عليها عمل التضاتفترامتبعه فى كل كود وا الل تقييم الك وسيتم توضيح طرق المؤخوذه فىعوامل و التشغيليم سواء طريقة الحدود القصوى او طريقة حد ال فى مبدأ التصم فيما بينها ستختلف تجميعىخر عمل برناجحية ا نااحية ومن نقعيه خاصه به ذلك من الى درجة واوصولل كود لعتبار فى كل امقارنه تلكئج ال نتا ستيم الربط بينً يضامتبعه فى كل كود و ا الل تقييم الكسى شارب يشمل طرقغة برمجة ال بلإهالية تم اجرارات عمختبائج ا و نتا هنا سوفكواد ومن فى تلك ا التصنيفت ذاتلعينالى بعض ا ع يتم الىوصول الئج الى الواقعقرب نتاكواد موضوع الدراسة ا أى ا. بعض مناقشةفه الى ذلك سيتمضا وبا التىلنظرياتستخدام أولى اسه باكواد موضوع الدرا المتبعه فى ا التقييم دت فى طرقِ جُ صور قد و القلمعاصرستخدام التى سيتم تطويعها لل ا لتقييم الكخدمت قديما است. ُ كثر قربا وسوف يتم اقتراح صيغه اخرى ا المسموح بهلد الكلتى تتحكم فى تحديد إجهاغيرات ا تربط المتلواقع ل. ABSTRACT This paper presents a study for comparison between different codes which widely used globally in the calculation the allowable fatigue strength for a particular element during the design process. The fatigue assessment method, the assumptions, the considerations followed in each code will be clarified and the difference between them either in the design principle ,whether load and resistance factor method or the allowable stress design method or the factors that was taken into consideration to achieve their vision of the reality. On the other hand, an overall program is performed with C# programming language to facilitate the fatigue assessment process in each code. Also, another comparison also link those results with test result was conducted on many samples which categorized in those codes then we will reach which of code under consideration near to the founded in deed and there would be many trials to avail these test result to perform more realistic S-N curves using the high ordered polynomial equation. In addition, Some shortcomings would be indicated belong to the fatigue assessment method in the considered code using a traditional neglected theory helped formerly in the fatigue assessment and it would be adapted to the contemporary uses. Higher order proposal formula approach to the results founded in deed contained the governing variables in determining the allowable fatigue strength. KEYWORDS: Fatigue in steel, Fatigue Assessment Methods, Repeated loading 1- INTRODUCTION: Fatigue in metals is the process of initiation and growth of cracks resulting from of repetitive cyclic loading. If crack became a non-normal beyond the permitted limits
COMPARISON BETWEEN DIFFERENT CODES IN CALCULATION OF THE EFFECT OF FATIGUE ON STEEL STRUCTURES
Apr 28, 2023
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