Breathing-induced Fatigue in Thin-walled Construction

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• 作者：Miroslav 艩kaloud ; Marie Z枚rnerov谩 ; Shota Urushadze
• 关键词：slender webs ; fatigue limit states ; buckling ; breathing ; S-N curves
• 刊名：Procedia Engineering
• 出版年：2013
• 年：2013
• 卷：66
• 期：Complete
• 页码：383-392
• 全文大小：1341 K

文摘

The cumulative damage behaviour generated by web breathing was analysed, the process of the initiation and propagation of fatigue cracks induced thereby was studied, and their impact on the failure mechanism and the fatigue limit state of the girders was determined. It was found out that the above phenomenon led to a significant 鈥渆rosion鈥?of the beneficial post-buckled reserve of strength. Therefore, S-N curves were established for (i) the fatigue limit state and (ii) the onset-of-the-first-fatigue-crack limit state, specifying those periods after which checks for the appearance of fatigue cracks in bridge plate elements need to be carried out.