EXPERIMENTAL STUDY ON INTERFACE PERFORMANCE OF GFRP COMPOSITE SANDWICH COLUMN WITH WOOD-PLASTIC COMPOSITE CORE

Abstract

Abstract: Fibre reinforced polymer (FRP) composite sandwich column which composed of FRP sheets and wood-plastic composite (WPC) core were manufactured using vacuum infusion molding process with wood-plastic composite, alkali-free glass fiber bundle and unsaturated resin. The effects of the WPC core on load-bearing capacity, the failure mode and load-strain curve were investigated using axial compressive tests. The results showed that a failure of axial strength and transverse cracks occurs in the composite sandwich column under axial pressure. The ultimate bearing capacity of the composite sandwich column under axial pressure is related to section size of the column, which is raised with the size. In addition, the lateral deformations of the composite sandwich column is greatly constrained by FRP, so the ductility can be improved. A formula of ultimate bearing capacity of the composite sandwich column was deduced and the predictions of the formula agree well with the test data when the value is 0.3.

Key words: wood-plastic composite (WPC), fibre reinforced polymer (FRP), composite column, axial compression, combination coefficient

CLC Number:

TB332
TB301

LENG Yuan, QI Yu-jun, LIU Wei-qing, FANG Hai. EXPERIMENTAL STUDY ON INTERFACE PERFORMANCE OF GFRP COMPOSITE SANDWICH COLUMN WITH WOOD-PLASTIC COMPOSITE CORE[J]. Fiber Reinforced Plastics/Composites, 2017, 0(2): 10-14.

References

[1] 鲁礼娟. 我国木塑复合材料的生产现状及发展趋势[J]. 木材加工机械, 2008(6): 40-42.
[2] 李光哲. 木塑复合材料的研究热点与发展趋势[J]. 木材加工机械, 2010(2): 41-44.
[3] Haiar K J. Performance and design of prototype wood-plastic composite sections[D]. 2000.
[4] Clemons C. Wood-plastic composites in the United States. The interfacing of two industries[J]. Forest Products Journal, 2002, 52(6): 10-18.
[5] Slaughter A E. Design and fatigue of a structural wood-plastic composite[J]. Electronic Theses, 2004.
[6] 孙慧明, 方海, 祝露, 等. 复合材料环形组合柱的轴压性能试验及理论研究[J]. 工业建筑, 2014, 44: 59-63.
[7] Romanoff F, Varsta P. Bending Response of Web-Core Sandwich Beams[J]. Composite Structures, 2006, 73(4): 478-487.
[8] 方海, 刘伟庆, 万里. 点阵增强型复合材料夹层结构的制备与力学性能研究[J]. 建筑材料学报, 2008, 11(4): 496-499.
[9] Kumar P, Chandrashekhara K, Nanni A. Structural performance of a FRP bridge deck[J]. Construction And Building Materials, 2004, 18: 35-47.
[10] 齐玉军, 熊伟, 刘伟庆, 等. 新型 FRP拉挤组合型材及其结构应用初探[J]. 玻璃钢/复合材料, 2014(12): 25-30.
[11] 马建勋, 胡平, 蒋湘闽, 等. 碳纤维布加固木柱轴心抗压性能试验研究[J]. 工业建筑, 2005, 35(8): 40-44.
[12] 许清风, 朱雷, 贡春成. CFRP加固短木柱的试验研究[J]. 施工技术, 2007, 36(5): 13-15.
[13] 淳庆, 潘建伍. 碳-芳混杂纤维布加固木柱轴心抗压性能试验研究[J]. 建筑材料学报, 2011, 14 (3): 427-431.
[14] Yu M, Zha X, Ye J, et al. A unified formulation for circle and polygon concrete-filled steel tube columns under axial compression[J]. Eng Struct., 2013, 49: 1-10.
[15] Rochette P, Labosslere P. Axial testing of rectangular column models confined with composites[J]. Compos Constr., 2000(4): 129-136.