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首页 > 过刊浏览>2023年第26卷第5期 >555-562. DOI:10.3969/j.issn.1007-9629.2023.05.014
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SMA/PVA混杂纤维增强水泥基复合材料拉伸性能
作者:
作者单位:

1.武汉科技大学 城市建设学院，湖北 武汉 430065;2.武汉科技大学 城市更新湖北省工程研究 中心，湖北 武汉 430065;3.中建壹品投资发展有限公司，湖北 武汉 430070

作者简介:

杨 曌（1977—），男，湖北武汉人，武汉科技大学教授，博士生导师，博士.E-mail：yzwh77@163.com

通讯作者:

杨 曌（1977—），男，湖北武汉人，武汉科技大学教授，博士生导师，博士.E-mail：yzwh77@163.com

中图分类号:

TU352.11

基金项目:

国家自然科学基金资助项目（52178158）；湖北省自然科学基金资助项目（2019CFB540）；国家级大学生创新创业训练计划项目（202110488009）；湖北省教育厅高等学校优秀中青年科技创新团队计划项目（Zy2022e004）


Tensile Properties of SMA/PVA Hybrid Fiber Reinforced Cementitious Composites
Author:
Affiliation:

1.School of Urban Construction， Wuhan University of Science and Technology， Wuhan 430065， China;2.Hubei Engineering Research Center for Urban Renewal， Wuhan University of Science and Technology， Wuhan 430065， China;3.China Construction Yipin Investment Development Co.， Ltd.， Wuhan 430070， China

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    摘要:

    为研究形状记忆合金（SMA）/聚乙烯醇（PVA）混杂纤维增强水泥基复合材料（SMA/PVA-ECC）的拉伸性能，开展单轴拉伸试验，分析了SMA/PVA-ECC试件的破坏现象、应力-应变曲线及特征参数，比较了SMA纤维掺量及其直径对试件拉伸性能的影响.结果表明：SMA/PVA-ECC试件卸载后残余裂缝宽度显著减小；SMA纤维掺量及其直径对试件拉伸性能影响显著，当SMA纤维直径为0.2 mm、掺量为0.2%时，试件综合拉伸性能最好，其初裂强度、极限拉伸应力及应变较工程水泥基复合材料（ECC）试件分别提高56.4%、23.6%及13.4%.

    Abstract:

    In order to study the tensile properties of shape memory alloy/polyvinyl alcohol-engineening cement-based composite materials（SMA/PVA-ECC）， uniaxial tensile test were carried out，and the damage phenomena， stress-strain curves and characteristic parameters of the SMA/PVA-ECC specimens were analyzed， and the effects of SMA fibers content and diameter were compared. The results show that the residual crack widths of SMA/PVA-ECC specimens are significantly reduced after unloading. The content and diameter of SMA fiber have significant effects on the tensile properties of the specimens. Compared with the engineering cement-based composite materials（ECC） specimens， the comprehensive tensile properties of the specimens with 0.2 mm fiber diameter and 0.2% fiber content are the best， and the initial cracking strength， ultimate tensile stress and ultimate tensile strain are increased by 56.4%， 23.6% and 13.4%， respectively.

    表 3 试件拉伸应力-应变曲线特征参数Table 3 Tensile stress-strain curve characteristic parameters of specimens
    图1 ECC的应力-应变曲线Fig.1 Stress-strain curve of ECC
    图2 SMA纤维的应力-应变曲线Fig.2 Stress-strain curve of SMA fiber
    图3 拉伸试件尺寸示意图Fig.3 Dimension diagram of tensile specimen （size：mm）
    图4 SMA纤维端头设计Fig.4 End design of SMA fiber （size：mm）
    图5 单轴拉伸试验装置及拉伸夹具示意图Fig.5 Uniaxial tension test device and schematic diagram of stretching fixture
    图6 试件破坏形态Fig.6 Failure modes of specimens
    图7 ECC试件和SMA/PVA-ECC试件的应力-应变曲线Fig.7 Stress-strain curves of ECC specimen and SMA/PVA-ECC specimens
    图8 相同SMA纤维直径条件下SMA纤维掺量对SMA/PVA-ECC试件应力-应变曲线的影响Fig.8 Effect of SMA fiber content on the stress-strain curves of SMA/PVA-ECC specimens with the same SMA fiber diameter
    图9 相同SMA纤维掺量条件下SMA纤维直径对SMA/PVA-ECC试件应力-应变曲线的影响Fig.9 Effect of SMA fiber diameter on the stress-strain curves of SMA/PVA-ECC specimens with the same SMA fiber content
    图10 SMA纤维变形示意图Fig.10 Schematic diagram of SMA fiber deformation
    表 4 试件主裂缝处SMA纤维应变Table 4 Strain of SMA fiber at the main crack of specimens
    表 1 ECC配合比Table 1 Mix proportion of ECC
    表 2 单轴拉伸试件表Table 2 Specimen table of uniaxial tension
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杨曌,钟奕岚,杨智,熊浩.SMA/PVA混杂纤维增强水泥基复合材料拉伸性能[J].建筑材料学报,2023,26(5):555-562

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  • 收稿日期:2022-05-21
  • 最后修改日期:2022-06-30
  • 在线发布日期: 2023-06-08
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