Analysis on Bearing Capacity and Bending Ductility of GFRP-Coral Concrete Columns under Eccentric Compression

Abstract

Abstract: To study the effects of eccentricity and stirrup ratios on bearing capacity and bending ductility of glass fiber composite (GFRP) bars-coral concrete columns under eccentric compression, an eccentric compression test was carried out on 5 coral concrete columns. The effect of eccentricity on bearing capacity, GFRP longitudinal bar strain, concrete strain, vertical displacement and mid-span deflection was investigated and analyzed. Based on the five eccentricities above, 15 coral concrete columns were established and studied by ANSYS. Three stirrup ratios of 0.375% (stirrup spacing of 100, 75 and 50 mm respectively, the same as below), 0.500% and 0.750% were set in each group of eccentricity. Subsequently, the calculation methods of bending ductility and sectional curvature of these specimens were put forward in this paper. The results show that the increase of eccentricty not only decreases the bearing capacity, but reduces the increment speed of GFRP longitudinal bars strain on compression side. The increase of stirrup ratios not only improves the bearing capacity but also reduces the mid-span deflection of specimens.The theoretical calculated values of bearing capacity and bending ductility are in good agreement with the ANSYS simulated results.

Key words: GFRP bar, coral concrete, eccentric compression, stirrup ratio, bearing capacity, bending ductility, sectional curvature

CLC Number:

TU377.9

GUAN Jiwen, CHEN Hua, CHANG Ping, LIANG Qingwen, DAN Yu, YANG Hanning, CHEN Hongmei. Analysis on Bearing Capacity and Bending Ductility of GFRP-Coral Concrete Columns under Eccentric Compression[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(7): 2409-2418.

References

[1] 吴彰钰, 余红发, 麻海燕, 等. 新型珊瑚海水混凝土力学性能试验研究[J]. 海洋工程, 2018, 36(3): 59-68.
WU Z Y, YU H F, MA H Y, et al. Study on the mechanical properties of new coral aggregate seawater concrete[J]. The Ocean Engineering, 2018, 36(3): 59-68 (in Chinese).
[2] SHAKIBA M, OSKOUEI A V, KARAMLOO M, et al. Effect of mat anchorage on flexural bonding strength between concrete and sand coated GFRP bars[J]. Composite Structures, 2021, 273: 114339.
[3] TAHA A, ALNAHHAL W, ALNUAIMI N. Bond durability of basalt FRP bars to fiber reinforced concrete in a saline environment[J]. Composite Structures, 2020, 243: 112277.
[4] 窦雪梅, 余红发, 麻海燕, 等. 珊瑚混凝土在海洋环境中氯离子扩散实验[J]. 海洋工程, 2017, 35(1): 129-135.
DOU X M, YU H F, MA H Y, et al. Experiment on chloride diffusion coefficient of coral concrete exposed to marine environment[J]. The Ocean Engineering, 2017, 35(1): 129-135 (in Chinese).
[5] FAN X C, ZHOU Z R, TU W L, et al. Shear behaviour of inorganic polymer concrete beams reinforced with basalt FRP bars and stirrups[J]. Composite Structures, 2021, 255: 112901.
[6] DAI J Y, YIN S P, LIN F J, et al. Study on bond performance between seawater sea-sand concrete and BFRP bars under chloride corrosion[J]. Construction and Building Materials, 2023, 371: 130718.
[7] IMJAI T, GARCIA R, GUADAGNINI M, et al. Strength degradation in curved fiber-reinforced polymer (FRP) bars used as concrete reinforcement[J]. Polymers, 2020, 12(8): 1653.
[8] 胡成超, 高奎, 涂建维, 等. GFRP筋与箍筋约束混凝土之间粘结性能的试验研究[J]. 复合材料科学与工程, 2020(10): 13-20.
HU C C, GAO K, TU J W, et al. Experimental research on bond behavior between GFRP bars and stirrups-confined concrete[J]. Composites Science and Engineering, 2020(10): 13-20 (in Chinese).
[9] AL RIFAI M, EL-HASSAN H, EL-MAADDAWY T, et al. Durability of basalt FRP reinforcing bars in alkaline solution and moist concrete environments[J]. Construction and Building Materials, 2020, 243: 118258.
[10] 陈红梅, 刘玉涛, 关纪文. BFRP筋增强珊瑚混凝土耐久性研究进展[J]. 硅酸盐通报, 2021, 40(11): 3544-3555.
CHEN H M, LIU Y T, GUAN J W. Research progress on durability of coral concrete reinforced with BFRP bars[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(11): 3544-3555 (in Chinese).
[11] 赵秋红, 刘凯, 王菲, 等. GFRP筋橡胶集料混凝土梁受弯性能[J]. 复合材料学报, 2021, 38(5): 1611-1622.
ZHAO Q H, LIU K, WANG F, et al. Analyses on flexural behavior of GFRP-reinforced crumb rubber concrete beams[J]. Acta Materiae Compositae Sinica, 2021, 38(5): 1611-1622 (in Chinese).
[12] 杨霞, 杨文伟, 李顺涛. 采用CFRP增强的GFRP管混凝土短柱轴压性能试验研究[J]. 土木与环境工程学报(中英文), 2022(4): 124-132.
YANG X, YANG W W, LI S T. Experimental study on axial compression behavior of concrete-filled GFRP tube short columns strengthened with CFRP[J]. Journal of Civil and Environmental Engineering, 2022(4): 124-132 (in Chinese).
[13] 中华人民共和国工业和信息化部. 室温下连续纤维增强陶瓷基复合材料压缩性能试验方法: JC/T 2406—2017[S]. 北京: 中国建材工业出版社, 2017.
Ministry of Industry and Information Technology of China. Test method for compression behavior of continuous fiber reinforced ceramic matrix composites at room temperature: JC/T 2406—2017[S]. Beijing: China Building Materials Industry Press, 2017 (in Chinese).
[14] RAO L, WANG L, ZHENG Y. Experimental research on mechanical properties and compression constitutive relationship of PVA fiber-reinforced coral concrete[J]. Materials, 2022, 15(5): 1762.
[15] LI J W, GRAVINA R J, SMITH S T, et al. Bond strength and bond stress-slip analysis of FRP bar to concrete incorporating environmental durability[J]. Construction and Building Materials, 2020, 261: 119860.
[16] SUN L, WANG C, ZHANG C W, et al. Experimental investigation on the bond performance of sea sand coral concrete with FRP bar reinforcement for marine environments[J]. Advances in Structural Engineering, 2023, 26(3): 533-546.
[17] BLIKHARSKYY Y, SELEJDAK J, VASHKEVYCH R, et al. Strengthening RC eccentrically loaded columns by CFRP at different levels of initial load[J]. Engineering Structures, 2023, 280: 115694.
[18] MA H, ZHANG G H, XIE Z H, et al. Experimental tests and numerical simulation of eccentrically loaded SRRC filled square steel tube columns[J]. Journal of Asian Architecture and Building Engineering, 2022, 21(5): 1719-1735.
[19] 陈爽, 关纪文, 梁淑嘉, 等. CFRP筋-珊瑚混凝土柱偏压力学性能数值分析[J]. 河南理工大学学报(自然科学版), 2023, 42(1): 175-184.
CHEN S, GUAN J W, LIANG S J, et al. Numerical analysis on mechanical properties of eccentrically loaded coral concrete columns reinforced with CFRP bars[J]. Journal of Henan Polytechnic University (Natural Science), 2023, 42(1): 175-184 (in Chinese).
[20] LIU X C, CUI X X, YANG Z W, et al. Analysis of the seismic performance of site-bolted beam to column connections in modularized prefabricated steel structures[J]. Advances in Materials Science and Engineering, 2017, 2017: 1-18.
[21] 马辉, 陈云冲, 赵艳丽, 等. 偏压荷载下圆钢管型钢再生混凝土组合柱非线性行为研究[J]. 实验力学, 2020, 35(6): 1081-1091.
MA H, CHEN Y C, ZHAO Y L, et al. Study on nonlinear behavior of composite columns of RAC-filled circular steel tube and profile steel under eccentric compression loads[J]. Journal of Experimental Mechanics, 2020, 35(6): 1081-1091 (in Chinese).
[22] 王玉清, 蔡思远, 雷栋栋, 等. PVA-FRCC中长柱抗震性能与损伤分析[J]. 硅酸盐通报, 2023, 42(5): 1589-1598.
WANG Y Q, CAI S Y, LEI D D, et al. Seismic performance and damage analysis of PVA-FRCC medium-length columns[J]. Bulletin of the Chinese Ceramic Society, 2023, 42(5): 1589-1598 (in Chinese).
[23] 朱春阳, 王可心, 孙天娇, 等. 考虑粘结滑移的FRP筋混凝土柱偏压性能[J]. 沈阳建筑大学学报(自然科学版), 2020, 36(2): 220-228.
ZHU C Y, WANG K X, SUN T J, et al. Bias compression behavior of FRP concrete columns considering bond slip[J]. Journal of Shenyang Jianzhu University (Natural Science), 2020, 36(2): 220-228 (in Chinese).
[24] 许开成, 易彬, 张立卿, 等. 酸雨环境下掺锂渣钢筋混凝土柱有限元分析[J]. 华东交通大学学报, 2021, 38(3): 7-14.
XU K C, YI B, ZHANG L Q, et al. Finite element analysis of reinforced concrete column mixed with lithium slag under acid rain[J]. Journal of East China Jiaotong University, 2021, 38(3): 7-14 (in Chinese).
[25] 张建伟, 刘娟, 冯曹杰, 等. HRB600级钢筋钢纤维高强混凝土柱的受压性能[J]. 建筑结构, 2021, 51(4): 71-76+32.
ZHANG J W, LIU J, FENG C J, et al. Compressive performance of steel fiber reinforced high-strength concrete columns with HRB600 steel bars[J]. Building Structure, 2021, 51(4): 71-76+32 (in Chinese).
[26] 姚大立, 杨卫闯, 魏华, 等. 基于数值模拟方法再生混凝土梁弯曲延性分析[J]. 沈阳工业大学学报, 2019, 41(4): 464-468.
YAO D L, YANG W C, WEI H, et al. Ductility analysis for recycled concrete beam based on numerical simulation method[J]. Journal of Shenyang University of Technology, 2019, 41(4): 464-468 (in Chinese).
[27] 孙泽阳, 肖文超, 吴刚, 等. 钢-FRP复合筋混凝土梁截面弯矩-曲率性能初探[C]//中国土木工程学会FRP及工程应用专业委员会. 第九届全国建设工程FRP应用学术交流会论文集. 重庆: 《工业建筑》杂志社有限公司, 2015: 66-70.
SUN Z Y, XIAO W C, WU G, et al. Preliminary study on moment-curvature behavior of concrete beams reinforced by steel- fiber reinforced polymer composite bars[C]//FRP and Engineering Application Professional Committee of Chinese Civil Engineering Society. Proceedings of the 9th National Construction Engineering FRP Application Academic Exchange Conference. Chongqing: Industrial Building Magazine Co., Ltd., 2015: 66-70 (in Chinese).