基于V型缺口梁的聚乙烯纤维增强超高延性水泥基复合材料受剪性能试验研究

许铭纹; 苏艳丽; 王欣汝; 金辰华; 吴畅; 周臻

doi:10.13204/j.gyjzG23072614

基于V型缺口梁的聚乙烯纤维增强超高延性水泥基复合材料受剪性能试验研究

doi: 10.13204/j.gyjzG23072614

1. 东南大学土木工程学院, 南京 211189;
2. 金陵科技学院土木建筑学院, 南京 211169

基金项目:

国家自然科学基金项目（52108119）；江苏省自然科学基金青年项目（BK20200376）；中央高校基本科研业务费专项资金资助项目（2242023k30059）。

详细信息

作者简介:
许铭纹,女,1999年出生,硕士研究生。

通讯作者:
周臻,男,博士,教授,博士生导师,seuhj@163.com。

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- 文章访问数: 41
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- 被引次数: 0
出版历程
- 收稿日期: 2023-07-26
- 网络出版日期: 2023-11-08

Experimental Research on Shear Performance of V-Notched PE-ECC Beams

1. School of Civil Engineering, Southeast University, Nanjing 211189, China;
2. School of Architectural Engineering, Jinling Institute of Technology, Nanjing 211169, China

摘要

摘要: 基于9根聚乙烯纤维增强超高延性水泥基复合材料（PE-ECC）和3根无纤维基体浇筑的V型缺口梁受剪性能试验，研究不同配合比和纤维体积掺量对V型缺口PE-ECC梁的剪切性能的影响。结果表明：对照组无纤维基体V型缺口梁表现为明显的脆性破坏特征，而V型缺口PE-ECC梁均发生延性破坏；V型缺口PE-ECC梁试验过程中裂缝主要出现在缺口两侧加载点与支座之间的区域，呈现明显的多缝开裂现象，当荷载达到峰值荷载之后试件的下支座处出现主裂缝并且试件具有明显的挠度，这与无纤维基体试件有着显著的区别；当纤维体积掺量在0%~2%范围内时，V型缺口PE-ECC梁的受剪承载力和延性随纤维体积掺量的增大而增加，且纤维体积掺量为2%的试件的裂缝开展较纤维体积掺量为1%的试件更加充分；当纤维体积掺量为2%时，PE-ECC梁的名义抗剪强度平均值为9.46MPa，为同配合比PE-ECC轴心抗拉强度的1.79倍。
- 超高延性水泥基复合材料 /
- 聚乙烯纤维 /
- V型缺口梁 /
- 剪切性能 /
- 多缝开裂
Abstract: Through shear tests on 12 polyethylene fiber-reinforced engineered cementitious composite (PE-ECC) V-notched beams, the effects of different mix proportion and fiber content on the shear performance of V-notched PE-ECC beams were studied. The test results showed that the V-notched beam with pure matrix was obvious brittle damage, while the V-notched PE-ECC beam was ductile damage. The cracks of the V-notched PE-ECC beams mainly appeared in the region between the loading point and the support on both sides of the notch, and the V-notched PE-ECC beams exhibited multi-cracking characteristics. When the load reached the peak load, the specimen shows the main crack and the specimen had obvious deflection. When the fiber content is in the range of 0%-2%, the shear capacity and ductility of V-notched PE-ECC beams increased with the increase of fiber content, and the crack propagation of the specimens with 2% fiber content was more sufficient than that of the specimens with 1% fiber content, while the average shear strength of PE-ECC was 9.46 MPa, which was 1.79 times of the axial tensile strength, when the fiber content is 2%.
- engineered cementitious composite /
- polyethylene fiber /
- V-notched beams /
- shear performance /
- multiple cracking

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参考文献(20)

[1]	伍威, 朱伟超, 王雪纯. 工程水泥基复合材料的现状分析及应用[J]. 四川建材, 2017, 43(1):14-16.
[2]	LI V C, LEUNG C K Y. Steady-state and multiple cracking of short random fiber composites[J]. Journal of Engineering Mechanics(ASCE), 1992, 118(11):2246-2264.
[3]	LI V C, STANG H, KRENCHEL H. Micromechanics of crack bridging in fiber-reinforced concrete[J]. Materials and Structures, 1993, 26(162):486-494.
[4]	LI V C, KANDA T. Engineered cementitious composites for structural applications[J]. Journal of Materials in Civil Engineering, 1998, 10(2):66-69.
[5]	LI V C, WANG S X, WU C. Tensile Strain-hardening behavior of polyvinyl alcohol engineered cementitious composite (PVA-ECC)[J]. ACI Materials Journal, 2001, 98(6):483-492.
[6]	丁一, 陈小兵, 李荣. ECC材料的研究进展与应用[J]. 建筑结构, 2007, 37(增刊1):378-382.
[7]	汪卫, 潘钻峰, 孟少平, 等. 国产PVA纤维增强水泥基复合材料力学性能研究[J]. 工业建筑, 2014, 44(增刊1):958-964.
[8]	YU K Q, YU J T, DAI J G, et al. Development of ultra-high performance engineered cementitious composites using polyethylene (pe) fibers[J]. Construction Building Material, 2018, 158:217-227.
[9]	HUANG B T, ZHU J X, WENG K F, et al. Ultra-high-strength engineered/strain-hardening cementitious composites (ECC/SHCC):material design and effect of fiber hybridization[J/OL]. Cement and Concrete Composites, 2022, 129[2023-07-26].https://doi.org/10.1016/j.cemconcomp.2022.104464.
[10]	LI V C, MISHRA D K, NAAMAN A E, et al. On the shear behavior of engineered cementitious composites[J]. Advanced Cement Based Materials, 1994, 1(3):142-149.
[11]	VAN ZIJL G P A G. Improved mechanical performance:shear behaviour of strain-hardening cement-based composites (SHCC)[J]. Cement and Concrete Research, 2007, 37(8):1241-1247.
[12]	PAEGLE I, FISCHER G. Phenomenological interpretation of the shear behavior of reinforced engineered cementitious composite beams[J]. Cement and Concrete Composites, 2016, 73:213-225.
[13]	HOU L J, XU S L, ZHANG X F, et al. Shear behaviors of reinforced ultrahigh toughness cementitious composite slender beams with stirrups[J]. Journal of Materials in Civil Engineering, 2014, 26(3):466-475.
[14]	潘钻峰, 刘籍蔚, 吴畅, 等. 外包配筋ECC组合柱抗震性能试验研究与有限元分析[J]. 建筑结构学报, 2017, 38(9):38-45.
[15]	蔡景明, 潘金龙, 苏浩. 钢筋增强ECC-钢管混凝土组合柱抗震性能试验及其数值模拟[J]. 建筑结构学报, 2020, 41(7):55-62.
[16]	俞可权, 余江滔, 李凌志, 等. 可用于无筋建造的超高延性水泥基复合材料力学性能研究[J]. 建筑结构, 2019, 49(2):29-35 , 42.
[17]	邓明科, 刘华政, 马福栋, 等. 聚乙烯醇纤维改性高延性混凝土双面剪切试验及剪切韧性评价方法[J]. 复合材料学报, 2020, 37(2):461-471.
[18]	王玉清, 刘潇, 高元明, 等. 不同纤维掺量下聚乙烯醇纤维增强工程水泥复合材料梁剪切韧性试验[J]. 复合材料学报, 2019, 36(8):1968-1976.
[19]	中华人民共和国工业和信息化部. 高延性纤维增强水泥基复合材料力学性能试验方法:JC/T 2416-2018[S]. 北京:中国建材工业出版社,2018.
[20]	KANAKUBO T, SHIMIZU K, NAGAI S, et al. Shear transmission on crack surface of ECC[C]//In Proceedings 7th International Conference on Fracture Mechanics of Concrete and Concrete Structures (FraMCoS-7). Jeju, Korea:2010:1623-1630.