Size-dependency of concrete-filled steel tubes subject to impact loading

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• 作者：Mahsa Mirmomeni^a ; Amin Heidarpour^a ; ^{amin.heidarpour@monash.edu} ; Xiao-Ling Zhao^a ; Riadh Al-Mahaidi^b ; Jeffrey A. Packer^c
• 关键词：Concrete-filled steel tubes (CFST) ; Impact loading ; Size dependency ; Boundary conditions ; Confinement
• 刊名：International Journal of Impact Engineering
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：100
• 期：Complete
• 页码：90-101
• 全文大小：3509 K
• 卷排序：100

文摘

Effect of size on the impact response of CFST sub-samples is investigated. Different height-to-diameter and diameter-to-tube-wall thickness ratios are tested. The dynamic increase factor (DIF) of CFSTs is proven to be size-dependent. Interaction between concrete and steel cannot be neglected at impact rates. New size- and rate-dependent expressions are proposed for the DIFy of CFSTs.