STUDY ON FAILURE MECHANISM OF PVC-FRP CONFINED CONCRETE COLUMN SUBJECTED TO AXIAL COMPRESSION

Abstract

Abstract: According to the experimental study on 12 PVC-FRP confined concrete columns subjected to axial compression, the failure mode and failure mechanism of PVC-FRP confined concrete column are analyzed. The loading process of PVC-FRP confined concrete column may be divided into three sections: the elastic, the elastic-plastic and strengthening stage. Based on the material characteristics of PVC tube, core concrete and CFRP strips, the confining procedure of core concrete may be divided into three stages: preceding the crack of concrete, after the crack of concrete and the internal force redistribution. PVC tube includes the elastic and elastic-plastic stage; the stress and strain of CFRP strips are in increasing condition; the stress paths of PVC tube, core concrete and CFRP strips are presented on the basis of experimental study. The simplified calculating method of bearing capacity of PVC-FRP confined concrete column is also proposed by the condition of limit equilibrium.

Key words: PVC-FRP tube, concrete column, bearing capacity, failure mechanism, confinement

CLC Number:

YU Feng , NIU Di-tao. STUDY ON FAILURE MECHANISM OF PVC-FRP CONFINED CONCRETE COLUMN SUBJECTED TO AXIAL COMPRESSION[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(11): 21-25.

References

[1] Mirmiran, A., and Shahawy, M.. Behavior of Concrete Columns Confined by Fiber Composites[J]. Journal of Structural Engineering, 1997, 123(5): 583-590.
[2] Rochette P, Labossiere P. Axial Testing of Rectangular Column Models Confined with Composites[J]. Journal of Composite for Construction, 2000, 4(3): 129-136.
[3] 于清,韩林海.FRP约束混凝土构件抗弯承载力研究[J].土木工程学报,2004,7(11):33-40.
[4] Feng Yu, Ditao Niu. Unified Bearing Capacity Model of Confined Concrete Column Subjected to Axial Compression[J]. Journal of Harbin Institute of Technology, 2009, 16(5): 638-642.
[5] 于峰,武萍. FRP约束钢管混凝土长柱承载力研究[J].玻璃钢/复合材料,2011,(4):60-62.
[6] 余涛,滕锦光. FRP-混凝土-钢双壁空心构件及其在桥梁结构中的应用前景[J]. 玻璃钢/复合材料,2011,(5):20-23.
[7] 欧阳利军,陆洲导,丁斌. 玄武岩纤维布加固混凝土连续梁抗弯试验研究[J]. 玻璃钢/复合材料,2013,(2):3-7.
[8] 于峰,牛荻涛,武萍. PVC-FRP管混凝土结构实际应用的可行性研究[J]. 建筑科学,2007,23(11):102-104.
[9] 于峰. PVC-FRP管混凝土柱力学性能的试验研究与理论分析[D]. 西安: 西安建筑科技大学博士学位论文,2007.
[10] 黎德光. 偏压PVC-FRP管钢筋混凝土柱力学性能研究[D]. 马鞍山: 安徽工业大学硕士学位论文,2013.
[11] Saafi,M. Development and Behavior of a New Hybrid Column in Infrastructure Systems[D]. Ph.D. Thesis of the University of Alabama in Huntsville, 2001.
[12] Feng Yu, Ditao Niu. Stress-strain model of PVC-FRP confined concrete column[J]. International Journal of Physical Science, 2010, 5(15): 2304-2309.
[13] 王忠文. 轴压PVC-FRP管混凝土短柱力学性能研究[D]. 西安: 西安建筑科技大学硕士学位论文,2008.
[14] 杨洋. 不同材料约束混凝土轴压短柱的试验研究[D]. 广州: 广东工业大学硕士学位论文,2008.
[15] 于峰,武萍. 新型组合结构柱性能研究[J]. 工业建筑,2009,39(2):97-99.