Tests and design of concrete-filled elliptical hollow section stub columns
Tests and design of concrete-filled elliptical hollow section stub columns
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DOI：
10.1016/j.tws.2008.11.004
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发表时间：
2009-06
影响因子：
6.4
通讯作者：
X. Zhao;J. Packer
中科院分区：
文献类型：
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作者：
X. Zhao;J. Packer
与钢管混凝土柱类似，椭圆空心截面（EHS）的空隙填充将产生增加的强度、刚度、能量吸收和耐火性。首先对未填充的EHS进行短柱试验。对文献中推导屈服伸长极限的当量直径进行了讨论。提出了一种等效矩形空心截面（RHS），推导出了轴压下EHS截面的极限承载力。试验研究也进行了混凝土填充EHS短柱的行为。试验中采用了普通混凝土和自密实混凝土。研究了不同的加载方法;例如，仅通过钢筋加载、仅通过混凝土加载以及通过整个截面加载。本文基于长径比为2的碳钢EHS的实验数据，这也是目前生产的唯一产品类型。承载能力进行了比较，使用EC 4和CAN/CSA-S16预测。给出了建议的设计公式。
Similar to concrete-filled tubular columns, void-filling of elliptical hollow sections (EHS) will produce increased strength, stiffness, energy absorption and fire resistance. Stub column tests on unfilled EHS were performed first. Discussions are made on the equivalent diameters in the literature for deriving the yield slenderness limit. An equivalent rectangular hollow sections (RHS) is proposed to derive such a limit for EHS sections in axial compression. An experimental investigation has also been carried out on the behaviour of concrete-filled EHS stub columns. Both normal concrete and self consolidating concrete (SCC) were used in the testing program. Different loading methods were investigated; e.g., loading through steel alone, loading through concrete alone and loading through the whole cross-section. This paper is based on experimental data on carbon steel EHS with an aspect ratio of 2, which is also the only product type currently produced. The load carrying capacity is compared with that predicted using EC4 and CAN/CSA-S16. Proposed design formulae are given.