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| Study on compression-bending interaction relation of FRP confining concrete filled steel tube column |
| Received:December 08, 2015 Revised:April 19, 2016 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201702018 |
| KeyWord:combining structure FRP confined concrete filled steel tube cross sectional analysis compression-bending axial compression-bending interaction |
| Author | Institution |
| 朱春阳 |
沈阳建筑大学 土木工程学院 沈阳 |
| 赵颖华 |
大连海事大学 道路桥梁工程研究所 大连 |
| 孙丽 |
沈阳建筑大学 土木工程学院 沈阳 |
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| Abstract: |
| This paper presents a cross sectional analysis model for concrete filled FRP(Fiber Reinforced Polymer)-steel tube column, in order to build compression-bending interaction curve and study the effect of component properties on compression-bending behaviour of the composite column. The influence of FRP-steel composite confining level and loading eccentricity on constitutive relation of concrete are considered in modelling process. Modelling reasonability is verified by existing experimental results of concrete filled CFRP(Carbon Fiber Reinforced Polymer)-steel tube. Parametric study reveals that compression-bending performance of FRP confining concrete filled steel tube is mainly influenced by hoop FRP. Increasing hoop FRP layer can improve axial compressive capacity and axial ratio under large eccentric compression, but reduce eccentricity of the column. Longitudinal FRP thickness affect loading capacity rather than eccentricity and axial ratio under large eccentric compression. P-Δ sensibility is improved with the increase of hoop CFRP confining level. |