INFLUENCE OF PVA FIBER CONTENT ON FLEXURAL BEHAVIOR OFREINFORCED HPFRCC/CONCRETE COMPOSITE BEAMS

Abstract

Abstract: In order to improve the shortcoming of easy-cracking of reinforced concrete beams, concrete of tension zone can be partly replaced by HPFRCC to make reinforced HPFRCC/concrete composite beam. Based on experiments on normal section flexural behavior of composite beams, the influence of PVA fiber content by volume on flexural performance of composite beams were studied. Experimental results indicate that the HPFRCC layer in tension zone can inhibit and disperse the extension of cracks effectively and the crack distribution of composite beams are similar to root system. With the increase of PVA fiber content by volume, cracks become more fine. After cracking, the strain increases of tension steel and compression concrete slow down owing to the bridging effect of PVA fiber. Compared with ordinary concrete beam, the cracking load, yielding load and ultimate load of composite beams are all increased and the increases of cracking load are more obvious.

Key words: high performance fiber reinforced cement composite, PVA fiber, composite beam, flexural behavior

CLC Number:

TB332

LI Yan, PAN Yan-qiu, CHEN Wei-feng. INFLUENCE OF PVA FIBER CONTENT ON FLEXURAL BEHAVIOR OFREINFORCED HPFRCC/CONCRETE COMPOSITE BEAMS[J]. Fiber Reinforced Plastics/Composites, 2016, 0(5): 55-60.

References

[1] 冯乃谦, 顾晴霞, 郝挺宇. 混凝土结构裂缝与对策[M]. 北京: 机械工业出版社, 2006.
[2] Li V C, Wang S, Wu H C. Tensile strain-hardening behavior of PVA-HPFRCC[J]. American Concrete Institute Materials Journal, 2001, 98(6): 483-492.
[3] Kittinum S, Sherif EI T, Gustavo P M. Behavior of high performance fiber reinforced cement composites under multi-axial compressive loading [J]. Cement & Concrete Composites, 2010, 32(1): 62-72.
[4] Maalej M, Li V C. Introduction of strain hardening engineered cementitious composites in design of reinforced concrete flexural members for improved durability[J]. American Concrete Institute Structure Journal, 1995, 92 (2): 167-176.
[5] Maalej M, Ahmed S F U, Paramasivam P. Corrosion durability and structural response of functionally-graded concrete beams[C]//Proceedings of the JCI International Workshop on Ductile Fiber Reinforced Cementitious Composites (DFRCC) Application and Evaluation, Takayama, Japan, 2002: 161-170.
[6] 李启宏, 张君, 赵金平. 纤维增强水泥薄板及其复合梁抗弯性能研究[J].工程力学, 2011, 28(5): 135-142.
[7] 张君, 公成旭, 居贤春, 等. 延性纤维增强水泥基复合材料的抗弯性能[J]. 工程力学, 2010, 27(3): 112-115.
[8] 李庆华, 徐世烺. 超高韧性水泥基复合材料在受弯构件中应用研究[J]. 工程力学, 2010,S2: 235-239.
[9] 张秀芳, 徐世烺. 采用超高韧性水泥基复合材料提高钢筋混凝土梁弯曲抗裂性能研究(Ⅰ): 基本理论[J]. 土木工程学报, 2008, 41(12): 48-54.
[10] 张秀芳, 徐世烺, 侯利军. 采用超高韧性水泥基复合材料提高钢筋混凝土梁弯曲抗裂性能研究(Ⅱ): 试验研究[J]. 土木工程学报, 2009, 42(10): 53-66.
[11] 徐世烺, 王楠, 李庆华. 超高韧性水泥基复合材料增强普通混凝土复合梁弯曲性能试验研究[J]. 土木工程学报, 2010, 43(5): 17-22.
[12] 李庆华,徐世烺. 超高韧性复合材料控裂功能梯度复合梁弯曲性能试验研究[J]. 中国科学E辑: 技术科学, 2009, 39(8): 1391-1406.
[13] 侯利军, 张秀芳, 徐世烺. 试件厚度对超高韧性水泥基复合材料弯曲性能的影响[J]. 复合材料学报, 2011, 28(4): 171-179.
[14] 张玉娥. SHCC-钢筋混凝土叠合梁抗弯性能试验研究[D]. 青岛: 青岛理工大学, 2011.
[15] 李艳, 刘泽军, 梁兴文. 高性能PVA纤维增强水泥基复合材料单轴受拉特性[J]. 工程力学, 2013, 43(1): 322-330.