Concrete filled double circular steel tube (CFDCST) stub columns
Concrete filled double circular steel tube (CFDCST) stub columns
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DOI：
10.1016/j.engstruct.2016.12.061
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发表时间：
2017-03-15
影响因子：
5.5
通讯作者：
Al-Eliwi, Baraa J. M.
中科院分区：
文献类型：
--
作者：
Ekmekyapar, Talha;Al-Eliwi, Baraa J. M.
钢管混凝土柱由于综合了各种材料的优良性能而成为高性能结构的主要承载构件。近年来，有越来越多的兴趣在文献中，以进一步提高钢管混凝土柱的性能。本文首次通过试验和统计分析研究了双圆钢管混凝土柱（CFDCST）在提高组合构件性能方面的潜力。试验结果验证了CFDCST柱具有高强度、高刚度和高延性的性能，可用于具有挑战性的设计方案。采用统计分析的特点的影响参数的CFDCST柱的崩溃性能。为了确定CFDCST构件的配置是否可以用于高应力和变形的钢管混凝土柱的修复过程中，进行了进一步的实验工作。变形钢管混凝土短柱集中在一个更大的直径钢管和现有的钢管混凝土柱和更大的直径管之间的区域填充混凝土。对修复后的色谱柱进行了测试，并将其性能与CFDCST色谱柱的性能进行了比较。结果表明，采用这种修复方法是可行的，因为修复后的钢管混凝土柱的性能非常接近CFDCST同行。研究结果是相当揭示的设计目的，并有重要的意义，推进知识的复合材料压缩构件。(C)2017爱思唯尔有限公司版权所有
Concrete filled steel tube (CFST) columns are deployed as the main load carrying members in high performance structures as they integrate the beneficial properties of constituent materials. In recent years, there has been an increased interest in the literature to further improve the performance of the CFST columns. The work presented in this paper, for the first time, investigates through experimental and statistical analyses the potential of concrete filled double circular steel tube (CFDCST) columns to improve the efficiency of the composite members. Experimental results validated the capability of CFDCST columns in performing high strength, stiffness and ductility properties which can be utilized in challenging design scenarios. Employed statistical analysis characterized the impact of parameters on the collapse performance of the CFDCST column. To establish whether the configuration of CFDCST members could be used in repairing process of highly stressed and deformed CFST columns, a further set of experimental work was undertaken. Deformed CFST stub columns were centred in a larger diameter steel tube and the region between the existing CFST column and the larger diameter tube was filled with concrete. Repaired forms of the columns were tested and the performances were compared against the performances of the CFDCST counterparts. Results show that it is possible to employ such a repairing, since the repaired CFST columns exhibit performances very close to that of CFDCST counterparts. The findings are quite revealing for design purposes and have important implications for advancing the knowledge on composite compression members. (C) 2017 Elsevier Ltd. All rights reserved.