玄武岩复合材料筋增强ECC受拉性能及裂缝控制机理

硅酸盐通报 ›› 2022, Vol. 41 ›› Issue (8): 2684-2695.

玄武岩复合材料筋增强ECC受拉性能及裂缝控制机理

欧阳建新, 郭荣鑫, 万夫雄, 马倩敏, 杨洋

昆明理工大学建筑工程学院,云南省土木工程防灾重点实验室,昆明 650500

收稿日期:2022-04-07 修回日期:2022-05-15 出版日期:2022-08-15 发布日期:2022-08-30
通讯作者: 万夫雄,博士,讲师。E-mail:455437534@qq.com
作者简介:欧阳建新(1996—),男,硕士研究生。主要从事ECC加固方面的研究。E-mail:m15979645264@163.com
基金资助:
国家自然科学基金(11962009)

Tensile Property and Crack Control Mechanism of Basalt Fiber Reinforced Polymer Bar Reinforced ECC

OUYANG Jianxin, GUO Rongxin, WAN Fuxiong, MA Qianmin, YANG Yang

Yunnan Key Laboratory of Disaster Reduction in Civil Engineering, Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China

Received:2022-04-07 Revised:2022-05-15 Online:2022-08-15 Published:2022-08-30

摘要/Abstract

摘要： 工程水泥基复合材料(ECC)因其高韧性和多缝开裂特性成为研究热点,纤维复合材料(FRP)因具有抗拉强度高、密度小、耐腐蚀性好等优点而受到广泛关注。为研究玄武岩复合材料(BFRP)筋增强ECC(BFRP-ECC)的受拉性能以及筋材对基体的裂缝控制机理,考虑了基体类别和配筋率等因素,对ECC狗骨试件、BFRP-ECC和BFRP-砂浆薄板试件进行了单轴拉伸试验,同时借助数字图像相关法(DIC)技术获得了试件受拉过程中的全场应变和开裂状态,基于Richard的弹塑性应力应变公式提出了BFRP-ECC单轴受拉应力应变本构模型。结果表明:BFRP-ECC的极限拉应力随配筋率的增加而增大;ECC基体对复合材料的受拉性能增强效果优于砂浆基体,同时以ECC为基体的复合材料在裂缝间距和宽度控制上都明显优于以砂浆为基体的复合材料;BFRP筋能增加BFRP-ECC裂缝处的桥连应力,减小裂缝间距和宽度,增加裂缝数量。本文建立的BFRP-ECC单轴受拉应力应变本构模型与试验数据吻合良好,较好地反映了BFRP-ECC受拉应力应变关系。

关键词: 工程水泥基复合材料, 玄武岩复合材料筋, 单轴拉伸, 裂缝控制, 应力应变本构模型, 数字图像相关法, 加固

Abstract: Engineered cementitious composite (ECC) has become a research hotspot because of its high toughness and multiple cracking characteristics. Fiber reinforced polymer (FRP) has attracted extensive attention because of its high tensile strength, low density and good corrosion resistance. In order to study the tensile property of basalt fiber reinforced polymer (BFRP) bar reinforced ECC (BFRP-ECC) and the crack control mechanism of bars on the matrix, considering different types of matrix and reinforcement ratio, an experimental program on ECC dog-bone specimens, BFRP-ECC and BFRP-mortar thin plate specimens was conducted under uniaxial tensile loading. At the same time, the full field strain and cracking state of specimens were obtained by digital image correlation (DIC) technology. Based on Richard's elastic-plastic stress-strain formula, the BFRP-ECC stress-strain constitutive model was proposed. The results show that the ultimate tensile stress of BFRP-ECC increases with the increase of reinforcement ratio. The enhancing effect of ECC matrix on the tensile property of composites is better than that of mortar matrix. At the same time, the composites based on ECC are obviously better than those based on mortar in the control of crack spacing and width. BFRP bar can increase the bridging stress at BFRP-ECC cracks, reduce the crack spacing and width, and increase the number of cracks. The uniaxial tensile stress-strain constitutive model of BFRP-ECC established in this paper is in good agreement with experimental data, which better reflects the tensile stress-strain relationship of BFRP-ECC.

Key words: engineered cementitious composite, basalt fiber reinforced polymer bar, uniaxial tension, crack control, stress-strain constitutive model, digital image correlation, reinforcement

中图分类号:

TU528

欧阳建新, 郭荣鑫, 万夫雄, 马倩敏, 杨洋. 玄武岩复合材料筋增强ECC受拉性能及裂缝控制机理[J]. 硅酸盐通报, 2022, 41(8): 2684-2695.

OUYANG Jianxin, GUO Rongxin, WAN Fuxiong, MA Qianmin, YANG Yang. Tensile Property and Crack Control Mechanism of Basalt Fiber Reinforced Polymer Bar Reinforced ECC[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(8): 2684-2695.

参考文献

[1] 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.
YE L P, FENG P. Applications and development of fiber-reinforced polymer in engineering structures[J]. China Civil Engineering Journal, 2006, 39(3): 24-36 (in Chinese).
[2] LI V C, LEUNG C K Y. Steady-state and multiple cracking of short random fiber composites[J]. Journal of Engineering Mechanics, 1992, 118(11): 2246-2264.
[3] LI V C, WU C, WANG S X, et al. Interface tailoring for strain-hardening polyvinyl alcohol-engineered cementitious composite (PVA-ECC)[J]. ACI Materials Journal, 2002, 99(5): 463-472.
[4] 《中国公路学报》编辑部.中国路基工程学术研究综述·2021[J].中国公路学报,2021,34(3):1-49.
Editorial Department of China Journal of Highway and Transport. Review on China's subgrade engineering research·2021[J]. China Journal of Highway and Transport, 2021, 34(3): 1-49 (in Chinese).
[5] 朱忠锋,王文炜,郑宇宙,等.基于非接触式观测技术的FRP/ECC复合材料反复受拉本构关系模型[J].土木工程学报,2019,52(10):36-45+55.
ZHU Z F, WANG W W, ZHENG Y Z, et al. The constitutive model of FRP/ECC composite materials under uniaxial cyclic tensile loading based on the digital image correlation technique[J]. China Civil Engineering Journal, 2019, 52(10): 36-45+55 (in Chinese).
[6] PAN B Z, LIU F, YAN Z G, et al. ECCs/UHPFRCCs with and without FRP reinforcement for structural strengthening/repairing: a state-of-the-art review[J]. Construction and Building Materials, 2022, 316: 125824.
[7] ZHANG L F, ZHENG Y, YU Y, et al. Structural performance evaluation of ECC link slabs reinforced with FRP bars for jointless bridge decks[J]. Construction and Building Materials, 2021, 304: 124462.
[8] ZHENG A H, LIU Z Z, LI F P, et al. Experimental investigation of corrosion-damaged RC beams strengthened in flexure with FRP grid-reinforced ECC matrix composites[J]. Engineering Structures, 2021, 244: 112779.
[9] HOU W, LI Z Q, GAO W Y, et al. Flexural behavior of RC beams strengthened with BFRP bars-reinforced ECC matrix[J]. Composite Structures, 2020, 241: 112092.
[10] 郑宇宙.FRP格栅增强ECC复合加固混凝土梁试验与计算方法研究[D].南京:东南大学,2018:33-134.
ZHENG Y Z. Experiment and calculation method research on reinforced concrete (RC) beams strengthened with the composite of FRP grid and ECC[D]. Nanjing: Southeast University, 2018: 33-134 (in Chinese).
[11] QIN F J, ZHANG Z G, YIN Z W, et al. Use of high strength, high ductility engineered cementitious composites (ECC) to enhance the flexural performance of reinforced concrete beams[J]. Journal of Building Engineering, 2020, 32: 101746.
[12] 朱忠锋,王文炜.玄武岩格栅增强水泥基复合材料单轴拉伸力学性能试验及本构关系模型[J].复合材料学报,2017,34(10):2367-2374.
ZHU Z F, WANG W W. Experiment on the uniaxial tensile mechanical behavior of basalt grid reinforced engineered cementitious composites and its constitutive model[J]. Acta Materiae Compositae Sinica, 2017, 34(10): 2367-2374 (in Chinese).
[13] 余江滔,史天成,郁颉,等.高性能纤维增强混凝土与筋材复合体系拉伸性能研究[J].同济大学学报(自然科学版),2021,49(6):825-833+890.
YU J T, SHI T C, YU J, et al. Experimental study of tensile properties of composite system of high performance concrete and reinforcements[J]. Journal of Tongji University (Natural Science), 2021, 49(6): 825-833+890 (in Chinese).
[14] FU C S, GUO R X, LIN Z W, et al. Effect of nanosilica and silica fume on the mechanical properties and microstructure of lightweight engineered cementitious composites[J]. Construction and Building Materials, 2021, 298: 123788.
[15] 张栋翔.PVA纤维水泥基复合材料(PVA-ECC)拉伸和弯曲性能试验研究[D].呼和浩特:内蒙古工业大学,2016:3.
ZHANG D X. Experimental research on tensile and flexural properties of polyvinyl alcohol fibers engineered cementitious composites (PVA-ECC)[D]. Hohhot: Inner Mongolia University of Tehchnology, 2016: 3 (in Chinese).
[16] 郑宇宙,王文炜,李剑锋,等.复材格栅-高延性纤维水泥基受拉本构关系模型[J].工业建筑,2016,46(5):12-17.
ZHENG Y Z, WANG W W, LI J F, et al. The constitutive relationship model of ECC composite strengthened with FRP grid under axial loading[J]. Industrial Construction, 2016, 46(5): 12-17 (in Chinese).
[17] RICHARD R M, ABBOTT B J. Versatile elastic-plastic stress-strain formula[J]. Journal of the Engineering Mechanics Division, 1975, 101(4): 511-515.
[18] LI V C. From micromechanics to structural engineering: the design of cementitious composites for civil engineering applications[J]. Structural Engineering/Earthquake Engineering, 1994, 10(2): 1-34.
[19] KANDA T, LI V C. New micromechanics design theory for pseudostrain hardening cementitious composite[J]. Journal of Engineering Mechanics, 1999, 125(4): 373-381.
[20] KANDA T, LI V C. Multiple cracking sequence and saturation in fiber reinforced cementitious composites[J]. Concrete Research and Technology, 1998, 9(2): 19-33.
[21] 张伟平,张誉.锈胀开裂后钢筋混凝土粘结滑移本构关系研究[J].土木工程学报,2001,34(5):40-44.
ZHANG W P, ZHANG Y. Bond-slip relationship between corroded steel bars and concrete[J]. China Civil Engineering Journal, 2001, 34(5): 40-44 (in Chinese).