Analytical behavior of concrete filled double steel tubular (CFDST) members under lateral impact
Analytical behavior of concrete filled double steel tubular (CFDST) members under lateral impact
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双钢管混凝土 (CFDST) 构件在横向冲击下的分析行为
DOI：
10.1016/j.tws.2015.12.006
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发表时间：
2016-04
影响因子：
6.4
通讯作者：
Rasmussen Kim J. R.
中科院分区：
文献类型：
--
作者：
Wang Rui;Han Lin-Hai;Zhao Xiao-Ling;Rasmussen Kim J. R.
本文采用有限元软件ABAQUS对CFDST构件进行了低速侧向冲击试验研究，考虑了材料非线性、钢和混凝土应变率的影响。CFDST成员的有限元分析（FEA）模型的描述和验证使用现有的实验结果。分析了CFDST构件在全加载范围内混凝土和钢管的应变和应力状态，研究了冲击高度、空心率、名义含钢率、内钢管径厚比和材料强度对冲击力和整体残余侧向变形的影响。在此基础上，提出了CFDST构件在侧向冲击作用下的动力增加系数，并分析了约束系数对动力增加系数的影响。结果表明，当约束系数大于1.03时，需要考虑动力增长系数，才能准确估算CFDST构件在侧向冲击作用下的动力承载力。
This paper presents an investigation of the behavior of CFDST members under low velocity lateral impact using ABAQUS, where nonlinear material behavior and strain rates of steel and concrete are included. The finite element analysis (FEA) models of CFDST members are described and verified using existing experimental results. Strain and stress states of concrete and steel tube in CFDST members are analyzed over the full loading range, followed by a parametric study investigating the influence of impact height, hollow ratio, nominal steel ratio, diameter-to-thickness ratio of inner steel tube and strength of materials on the impact force and global residual lateral deformation. Furthermore, the dynamic increase factor (DIF) of CFDST members under lateral impact is proposed, and the influence of the confinement factor on the dynamic increase factor (DIF) is analyzed. The results show that when the confinement factor is larger than 1.03, the dynamic increase factor needs to be considered to accurately estimate the dynamic resistance capacity of CFDST members subjected to lateral impact.
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影响因子：
1.5
作者：
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通讯作者：
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影响因子：
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