Tests of self-compacting concrete filled elliptical steel tube columns
Tests of self-compacting concrete filled elliptical steel tube columns
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DOI：
10.1016/j.tws.2016.10.015
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发表时间：
2017
影响因子：
6.4
通讯作者：
Munir Mahgub;A. Ashour;D. Lam;X. Dai
中科院分区：
文献类型：
--
作者：
Munir Mahgub;A. Ashour;D. Lam;X. Dai
本文对椭圆钢管自密实混凝土柱的轴压性能进行了试验研究。总共有10个试件，包括两个空柱，其长度、截面尺寸和混凝土强度都不同。试验结果表明，大长细比椭圆钢管自密实混凝土柱的破坏模式以整体屈曲为主。此外，由于组合相互作用，组合柱具有比空心柱更高的临界轴压承载力。但是，由于试件的长细比较大，虽然轴心受压承载力随混凝土标号的增加而增大，但核心混凝土抗压强度的变化对其临界轴压承载力的影响不明显。钢管混凝土柱轴心受压承载力的试验研究结果与欧洲规范4中提供的简单计算方法的计算结果进行了比较，两者吻合良好。文中给出的试验结果、分析比较，为自密实椭圆钢管混凝土柱在建筑工程实践中的应用提供了有力的支持。
This paper presents an experimental study into the axial compressive behaviour of self-compacting concrete filled elliptical steel tube columns. In total, ten specimens, including two empty columns, with various lengths, section sizes and concrete strengths were tested to failure. The experimental results indicated that the failure modes of the self-compacting concrete filled elliptical steel tube columns with large slenderness ratio were dominated by global buckling. Furthermore, the composite columns possessed higher critical axial compressive capacities compared with their hollow section companions due to the composite interaction. However, due to the large slenderness ratio of the test specimens, the change of compressive strength of concrete core did not show significant effect on the critical axial compressive capacity of concrete filled columns although the axial compressive capacity increased with the concrete grade increase. The comparison between the axial compressive load capacities obtained from experimental study and prediction using simple methods provided in Eurocode 4 for concrete-filled steel circular tube columns showed a reasonable agreement. The experimental results, analysis and comparison presented in this paper clearly support the application of self-compacting concrete filled elliptical steel tube columns in construction engineering practice.