JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2017, Vol. 47 ›› Issue (1): 76-83.doi: 10.6040/j.issn.1672-3961.0.2016.186

Previous Articles     Next Articles

The influence of BFRP layers on the bending properties of the reinforced concrete beams

QIN Zipeng, TIAN Yan*, LI Gang, MA Yuwei, LIU Le, ZHANG Jinjian   

  1. College of Water &
    Architectural Engineering, Shihezi University, Shihezi 832000, Xinjiang, China
  • Received:2016-05-30 Online:2017-02-20 Published:2016-05-30

Abstract: In order to study the impact of different layers of basalt fiber reinforced polymer(BFRP)on the bending performance of reinforced concrete beams, three dividing point loading experiments were performed on the beams with a separate hydraulic jack. The failure modes, crack loads, yield loads, ultimate loads and the mid-span deflections corresponds to the above loads of the beams reinforced with 1, 2 and 3 layers of BFRP at the bottom of the beam were observed respectively and compared with the reference beam. The experiment results showed that, with the increasing number of the pasted BFRP layers, failure modes of the beams were changed, the number of primary cracks were decreased, crack loads, yield loads and ultimate loads were increased with varying degrees. The ultimate loads were respectively increased by 7.92%(1 layer), 23.66%(2 layers)and 29.31%(3 layers), and corresponding span deflections were also respectively decreased by 14.54%, 26.65% and 28.81%. When 1~2 layers of the BFRP were pasted, ductility factors of the beams were increased and the ductility factor was reduced when 3 layers of BFRP were pasted. The generation and expansion of the bending cracks were the main cause of the failure of BFRP. The flexural behavior of the beams was not proportional to the increase of the number of the BFRP layers. Taking together beams strengthened by 2 layers of BFRP, not only the bending bearing capacity and ductility have been greatly improved, but also the deflection has been greatly reduced which has good economic performance.

Key words: ultimate load, span deflection, tearing damage, debonding damage, failure modes, BFRP, reinforced concrete beams

CLC Number: 

  • TV41
[1] ZHOU Deyuan, LEI Zhen, WANG Jibing, et al. In-plane behavior of seismically damaged masonry walls repaired with external BFRP[J]. Composite Structures, 2013, 102(4):9-19.
[2] 管延华,蒋斌松,宋修广,等. FRP-螺栓联合加固RC梁受剪承载能力试验研究[J].山东大学学报(工学版),2010,40(2):82-87. GUAN Yanhua, JIANG Binsong, SONG Xiuguang, et al. Experimental study on RC beams strengthened in shear with hybrid bonding of FRP[J].Journal of Shandong University(Engineering Science), 2010, 40(2):82-87.
[3] YEBOAH D, TAYLOR S, MCPOLIN D, et al. Pull-out behaviour of axially loaded Basalt Fibre Reinforced Polymer(BFRP)rods bonded perpendicular to the grain of glulam elements[J].Construction and Building Materials, 2013, 38(5):962-969.
[4] 张焱,徐志胜.火灾损伤后钢筋混凝土梁的碳纤维布加固试验[J].自然灾害学报,2009,18(1):84-89. ZHANG Yan, XU Zhisheng. Experimental on strengthening fire-damaged reinforced concrete beam with carbon fiber reinforced polymer[J].Journal of Natural Disasters, 2009, 18(1):84-89.
[5] 欧阳利军,丁斌,陆洲导,等.玄武岩纤维与碳纤维加固连续梁抗弯试验研究[J].同济大学学报(自然科学版),2013,41(9):1341-1346,1410. OUYANG Lijun, DING Bin, LU Zhoudao, et al. Experimental study on flexural performances of continuous beams strengthened with BFRP and CFRP[J].Journal of Tongji University(Natural Science), 2013, 41(9):1341-1346,1410.
[6] SIRE J, PARK C, MOON D Y. Characteristics of basalt fiber as a strengthening material for concrete structures[J].Composites Part B Engineering, 2005, 36(6-7):504-512.
[7] LUDOVICO M D, PROTA A, MANFREDI G. Structural upgrade using basalt fibers for concrete confinement[J].Journal of Composites for Construction, 2010, 14(5):541-552.
[8] CHEN Z F, LEE S, NG M, et al. Study of design configurations for strengthening RC slabs using BFRP[J].Science and Engineering of Composite Materials, 2012, 15(3):165-174.
[9] FIORE V, ALAGNA F, BELLA G D, et al. On the mechanical behavior of BFRP to aluminum AA6086 mixed joints[J].Composites Part B Engineering, 2013, 48(10):79-87.
[10] OUYANG L J, LU Z D, CHEN W Z. Flexural experimental study on continuous reinforced concrete beams strengthened with basalt fiber reinforced polymer/plastic[J].Journal of Shanghai Jiaotong University(Science), 2012, 17(5):613-618.
[11] 秦丽辉,李岩,王宗林,等.BFRP加固损伤混凝土梁挠度计算方法[J].交通运输工程学报,2014,14(6):17-26. QIN Lihui, LI Yan, WANG Zonglin, et al. Deflection calculating method of damaged concrete beams strengthened with BFRP[J].Journal of Traffic and Transportation Engineering, 2014, 14(6):17-26.
[12] 杨勇新,陈绪军,邢建英,等.玄武岩纤维布加固混凝土梁的抗弯疲劳性能试验[J].华侨大学学报(自然科学版),2010,31(4):443-447. YANG Yongxin, CHEN Xujun, XING Jianying, et al. Study on fatigue performance of reinforced concrete beams strengthened with BFRP sheet[J].Journal of Huaqiao University(Natural Science), 2010, 31(4):443-447.
[13] GU X L, PENG B, CHEN G L, et al. Rapid strengthening of masonry structures cracked in earthquakes using fiber composite materials[J].Journal of Composites for Construction, 2012, 16(5):590-603.
[14] 雷真,周德源,张晖,等.玄武岩纤维加固震损砌体结构振动台试验研究[J].振动与冲击,2013,32(15):130-137. LEI Zhen, ZHOU Deyuan, ZHANG Hui, et al. Shaking table test on earthquake-damaged masonry structure strengthened with BFRP[J]. Journal of Vibration and Shock, 2013, 32(15):130-137.
[15] 周运瑜,余江滔,陆洲导,等.玄武岩纤维加固震损混凝土框架节点的抗震性能[J].中南大学学报(自然科学版),2010,41(4):1514-1521. ZHOU Yunyu, YU Jiangtao, LU Zhoudao, et al. Seismic behavior of BFRP-reinforced pre-damaged concrete beam-column joints[J].Journal of Central South University(Science and Technology), 2010, 41(4):1514-1521.
[16] 张斯,徐礼华,胡晓斌,等.玄武岩纤维布加固砌体墙抗震性能试验[J].武汉大学学报(工学版),2015,48(3):294-299,312. ZHANG Si, XU Lihua, HU Xiaobin, et al. Seismic performance of masonry walls strengthened with BFRP[J].Engineering Journal of Wuhan University, 2015, 48(3):294-299,312.
[17] 赛尔江·哈力克,刘清,韩风霞,等.BFRP加固新疆杨木柱的抗压试验研究[J].工程抗震与加固改造,2015,37(3):108-112. SAIERJIANG Halike, LIU Qing, HAN Fengxia, et al. Experimental study of compression reinforcement xinjiang yang poplar columns of BFRP[J].Earthquake Resistant Engineering and Retrofitting, 2015, 37(3):108-112.
[18] 胡玲,杨勇新,汪健根,等.层数对玄武岩纤维布与木材有效粘结长度影响的试验研究[J].建筑结构,2010,40(2):67-69. HU Ling, YANG Yongxin, WANG Jiangen, et al. Experimental study on the effective bond length between BFRP sheets and wood under different BFRP bond layers[J].Building Structure, 2010, 40(2):67-69.
[19] 张慎伟,王有志,张其林.芳纶纤维布层数对加固梁疲劳性能的影响[J].建筑材料学报,2006,9(3):302-306. ZHANG Shenwei, WANG Youzhi, ZHANG Qilin. Effect of the layer of aramid fiber reinforced plastic on the fatigue performance of reinforced concrete beam[J].Journal of Building Materials, 2006, 9(3):302-306.
[20] HUANG L H, LI Y J, WANG Y F, et al. Strengthening effects of BFRP on reinforced concrete beams[J].Journal of Southeast University(English Edition), 2013, 29(2):182-186.
[21] 陈绪军,杨勇新,邢建英,等.玄武岩纤维布加固钢筋混凝土梁抗弯试验研究[J].郑州大学学报(工学版),2009,30(2):61-65. CHEN Xujun, YANG Yongxin, XING Jianying, et al. Experimental study on flexural performance of RC beams strengthened with basalt fiber sheet[J].Journal of Zhengzhou University(Engineering Science), 2009, 30(2):61-65.
[22] 管延华,苗海涛,宋修广.FRP-螺栓联合加固技术锚固参数的研究[J].山东大学学报(工学版),2010,40(3):128-132. GUAN Yanhua, MIAO Haitao, SONG Xiuguang. Study of the anchoring parameter for the hybrid bonding of FRP[J].Journal of Shandong University(Engineering Science), 2010, 40(3):128-132.
[23] 童谷生,刘永胜,邱虎,等.BFRP约束钢筋混凝土轴压圆柱的尺寸效应研究[J].功能材料,2009,40(12):2044-2046. TONG Gusheng, LIU Yongsheng, QIU Hu, et al. Size effect in axially loaded reinforced concrete columns confined by BFRP sheets[J]. Journal of Functional Materials, 2009, 40(12):2044-2046.
[24] 秦士洪,田楚兴,黄宗明,等.板柱整体结构BFRP加固受力性能研究[J].工程力学,2009,26(6):133-140,171. QIN Shihong, TIAN Chuxing, HUANG Zongming, et al. Research on mechanical behaviors of slab-column integral structure strengthened with BFRP[J].Engineering Mechanics, 2009, 26(6):133-140,171.
[25] 苗吉军,曾在平,刘延春,等.冻融循环下玄武岩纤维加固混凝土构件性能研究[J].建筑结构学报, 2010(S2):266-269,314. MIAO Jijun, ZENG Zaiping, LIU Yanchun, et al. Research on behaviors of concrete members strengthened by basalt fiber reinforced plastic sheets under freeze-thaw environment[J].Journal of Building Structures, 2010(S2):266-269,314.
No related articles found!
Full text



No Suggested Reading articles found!