Flexural performance of concrete-encased concrete-filled steel tubes

Flexural performance of concrete-encased concrete-filled steel tubes
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钢管混凝土的抗弯性能

DOI:
10.1680/macr.13.00268
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发表时间:
2014-03
影响因子:
2.7
通讯作者:
Roeder Charles
Roeder Charles
中科院分区:
工程技术4区
文献类型:
--
作者:
An Yu-Feng;Han Lin-Hai;Roeder Charles

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研究了外包式钢管混凝土的抗弯性能。建立了有限元分析(FEA)模型来分析组合构件的受弯性能,并用一组试验数据来验证有限元模型。对组合截面的弯矩-曲率关系、应力分布以及钢与混凝土之间的相互作用进行了全过程分析。研究发现,薄壁钢管可用于混凝土外包式钢管混凝土柱中,在达到极限状态前不会发生局部屈曲,达到全塑性强度。提出了钢管混凝土受弯构件荷载传递机理的压杆-拉杆模型。最后,通过参数研究,推导出了钢管混凝土外包裹截面受弯承载力的简化计算公式。
The flexural performance of concrete-encased concrete-filled steel tubes (CFSTs) was investigated. A finite-element analysis (FEA) model is developed to analyse the flexural behaviour of the composite member and a set of test data used to verify the FEA modelling. Full-range analysis of the moment–curvature relation, the stress distributions across the composite section and the interactions between steel and concrete was carried out. It was found that thin-walled steel tubes can be used in concrete-encased CFSTs and develop full plastic strength without local buckling before reaching the ultimate state. A strut-and-tie model is proposed for the load transfer mechanism of a concrete-encased CFST member under bending. Finally, the paper presents a parametric study to derive simplified formulas for predicting the flexural capacity of concrete-encased CFST sections.
DOI: 10.1061/(asce)0733-9445(1999)125:9(1020
发表时间: 1999-09
期刊: Journal of Structural Engineering-asce
影响因子: --
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