EXPERIMENTAL STUDY ON AXIAL COMPRESSION BEHAVIOR OF ELLIPTICAL HIGH-STRENGTH CONCRETE-FILLED GFRP TUBULAR STUB COLUMNS

Abstract

Abstract: In order to investigate the axial compressive behavior of elliptical high-strength concrete-filled GFRP tubular stub columns and verify the applicability of Teng et al. 2016 model for the stress-strain relationship of FRP confined elliptical concrete, a total of four series of eight elliptical high-strength concrete-filled GFRP tubular stub column specimens were tested. One test parameter of the major axis-to-minor axis length ratio (abbreviated as aspect ratios), were considered in this experimental investigation. The test results revealed that the failure mode of elliptical specimens is the rupture of GFRP tube at around the apex of long axis of elliptical section. The confinement of elliptical GFRP tube can significantly improve the compressive strength and ultimate axial strain of concrete core, and the compressive strength and ultimate axial strain decrease with the increase of aspect ratios. The model of Teng et al. 2016 is in good agreement with the test results of this paper, which indicates that the model can be used to predicate the behavior of elliptical high-strength concrete-filled GFRP tubular stub column specimens.

Key words: elliptical, GFRP tube, high-strength concrete, axial compression behavior

CLC Number:

TB332

WANG Yan-lei, ZHANG Yi-nan, LIU Qing, XU Qing-feng. EXPERIMENTAL STUDY ON AXIAL COMPRESSION BEHAVIOR OF ELLIPTICAL HIGH-STRENGTH CONCRETE-FILLED GFRP TUBULAR STUB COLUMNS[J]. Fiber Reinforced Plastics/Composites, 2019, 0(12): 5-10.

References

[1] Chan C, Yu T, Zhang S. Compressive behaviour of square fibre-reinforced polymer-concrete-steel hybrid multi-tube concrete columns[J]. Advances in Structural Engineering, 2018, 21(8): 1162-1172.
[2] 吴育蔚, 冯鹏, 刘兴. 疲劳与长期自然暴露后的复材空心桥面板受力性能[J]. 玻璃钢/复合材料, 2018(11): 68-72.
[3] 张冰, 孙运楼, 齐玉军. 基于数值试验的FRP约束混凝土圆柱轴压性能研究[J]. 玻璃钢/复合材料, 2018(1): 50-59.
[4] 叶列平,冯鹏. FRP在工程结构中的应用与发展[J]. 土木工程学报, 2006, 39(3): 24-36.
[5] 王言磊, 金茂鑫, 黄平冬, 等. 方形复材-钢复合管约束型钢混凝土柱抗震性能试验研究[J]. 工业建筑, 2016, 46(5): 7-11, 66.
[6] Chau-Khun M, Apandi N M, Yung S C S, et al. Repair and rehabilitation of concrete structures using confinement: A review[J]. Construction & Building Materials, 2017, 133: 502-515.
[7] Zhang B, Yu T, Teng J G. Behaviour of concrete-filled FRP tubes under cyclic axial compression[J]. Journal of Composites for Construction, ASCE, 2014, 19(3): 04014060.
[8] Wang Y L, Wang Y S, Wan B L, et al. Strain and damage self-sensing of basalt fiber reinforced polymer laminates fabricated with carbon nanofibers/epoxy composites under tension[J]. Composites Part A Applied Science and Manufacturing, 2018, 113: 40-52.
[9] Zhang X, Wang Y L, Wan B L, et al. Effect of specimen thicknesses on water absorption and flexural strength of CFRP laminates subjected to water or alkaline solution immersion[J]. Construction & Building Materials, 2019, 208: 314-325.
[10] Rochette P, Labossiere P. Axial testing of rectangular column models confined with composites[J]. Journal of Composites for Construction, ASCE, 2000, 4(3): 129-136.
[11] Lam L, Teng J G. Design-oriented stress-strain model for FRP-confined concrete in rectangular columns[J]. Journal of Reinforced Plasticsand Composites, 2003, 22(13): 1149-1186.
[12] 潘景龙, 王雨光, 来文汇. 混凝土柱截面形状对纤维包裹加固效果的影响[J]. 工业建筑, 2001, 31(6): 17-19.
[13] Lam L, Teng J G. Compressive behavior of carbon fiber reinforced polymer-confined concrete in elliptical columns[J]. Journal of Structural Engineering, 2002, 128(12): 1535-1543.
[14] Pantelides C, Yan Z. FRP jacketed and shape-modified compression members: I-experimental behavior[J]. ACI Structural Journal, 2006, 103(6): 226-234.
[15] Campione G, Cucchiara C. Strength and strain capacity of fiber reinforced polymer-confined concrete in ellipitical columns[C]//Proceedings of the 8th International Symposium on Fiber Reinforced Polymer Reinforcement for Concrete Structures (FRPRCS-8). Patras, Greece: 2007.
[16] Moran D A, Pantelides C P. Elliptical and circular FRP-confined concrete sections: a Mohr-Coulomb analytical model[J]. International Journal of Solids & Structures, 2012, 49(6): 881-898.
[17] Teng J G, Wu J Y, Casalboni S, et al. Behavior and modeling of fiber-reinforced polymer-confined concrete in elliptical columns[J]. Advances in Structural Engineering, 2016, 19(9): 1359-1378.