龄期对定向钢纤维增强水泥基复合材料断裂性能的影响

卿龙邦; 杨卓凡; 慕儒

doi:10.13204/j.gyjzG20012801

龄期对定向钢纤维增强水泥基复合材料断裂性能的影响

doi: 10.13204/j.gyjzG20012801

河北工业大学土木与交通学院, 天津 300401

基金项目:

国家自然科学基金项目（51779069）。

详细信息

作者简介:
卿龙邦,男,1982年出生,博士,副教授。电子信箱:qing@hebut.edu.cn

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- 文章访问数: 104
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- 被引次数: 0
出版历程
- 收稿日期: 2020-05-27
- 网络出版日期: 2021-04-30

EFFECTS OF AGES ON FRACTURE PROPERTIES OF ORIENTED STEEL FIBER-REINFORCED CEMENTITIOUS COMPOSITES

Department of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China

摘要

摘要: 通过开展不同龄期的预制缺口三点弯曲梁断裂试验，研究龄期对定向及随机乱向钢纤维增强水泥基复合材料断裂性能的影响。根据试验测得的荷载-裂缝口张开位移曲线，分析不同龄期的钢纤维增强水泥基复合材料裂缝扩展的全过程。结果表明：钢纤维增强水泥基复合材料的弯曲强度随着龄期的增加而增加；在7 d龄期内，随着龄期的增长，定向钢纤维增强水泥基复合材料的断裂能增长较快，在7 d龄期后，断裂能的增长放缓且趋于稳定；当钢纤维体积掺量由1.2%增加到2.0%时，断裂能明显增大，且定向钢纤维增强水泥基复合材料的断裂能增长幅度相较随机乱向钢纤维增强水泥基复合材料更为显著。
- 龄期 /
- 定向钢纤维 /
- 水泥基复合材料 /
- 弯曲强度 /
- 断裂能
Abstract: The three-point bending tests on notched beams of different ages were conducted. The effects of ages on the fracture properties of oriented steel fiber-reinforced cementitious composites and randomly oriented steel fiber-reinforced cementitious composites were studied. Based on the curves of loadimg and crack opening displacement, the whole process of crack development of steel fiber-reinforced cementitious composites at different curing ages was analyzed. The results showed that, the flexural strength of steel fiber-reinforced cementitious composites increased with the increase of curing ages. The fracture energy of the composites increased rapidly in the stage of the first 7 days, and then slowed down and tended to be stable. When the volume contents of steel fiber varied from 1.2% to 2.0%, the fracture energy increased significantly, and the inprovement effect of the fracture energy of the composites was more obvious than that of randomly oriented fiber-reinforced cementitions conposites.
- age /
- oriented steel fiber /
- cementitious composite /
- flexural strength /
- fracture energy

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参考文献(24)

ABRISHAMBAF A,PIMENTEL M,NUNES S.Influence of Fibre Orientation on the Tensile Behaviour of Ultra-High Performance Fibre Reinforced Cementitious Composites[J].Cement and Concrete Research,2017,97:28-40.

WIJFFELS M J H,WOLFS R J M,SUIKER A S J,et al.Magnetic Orientation of Steel Fibres in Self-Compacting Concrete Beams:Effect on Failure Behavior[J].Cement and Concrete Composites,2017,80:342-355.

KANG S T,KIM J K.Investigation on the Flexural Behavior of UHPCC Considering the Effect of Fiber Orientation Distribution[J].Construction and Building Materials,2012,28(1):57-65.

尤志国,付秀艳,周云龙,等.钢纤维混凝土抗弯性能及断面处纤维分布规律研究[J].工业建筑,2017,47(2):123-127.

高丹盈,张廷毅.三点弯曲下钢纤维高强混凝土的断裂性能[J].硅酸盐学报,2007,35(12):1630-1635.

杨松霖,刁波.钢纤维形状对超高性能纤维混凝土力学性能的影响[J].工业建筑,2012,42(1):140-143.

慕儒,王成,李辉,等.单向分布钢纤维增强水泥基复合材料(Ⅲ):断裂性能[J].建筑材料学报,2016,19(1):78-82.

张廷毅,李庆斌,汪自力,等.钢纤维高强混凝土断裂韧度及影响因素[J].硅酸盐学报,2012,40(5):638-645.

CARPINTERI A,BRIGHENTI R.Fracture Behaviour of Plain and Fiber-Reinforced Concrete with Different Water Content Under Mixed Mode Loading[J].Materials and Design,2010,31:2032-2042.

高淑玲,徐世烺,袁全,等.混杂钢纤维高强混凝土断裂特性研究[J].大连理工大学学报,2011(4):561-566.

CAGGIANO A,CREMONA M,FAELLA C,et al.Fracture Behavior of Concrete Beams Reinforced with Mixed Long/Short Steel Fibers[J].Construction and Building Materials,2012,37:832-840.

MICHELS J,CHRISTEN R,WALDMANN D.Experimental and Numerical Investigation on Postcracking Behavior of Steel Fiber Reinforced Concrete[J].Engineering Fracture Mechanics,2013,98:326-349.

王强,胡少伟,王阳.不同龄期混凝土断裂试验研究[J].人民长江,2018,49(9):91-97.

莫卓凯.龄期对全级配混凝土断裂特性的影响和混凝土K_R阻力曲线实用解析方法[D].大连:大连理工大学,2014.

NGUYEN D H,DAO V T N.A Novel Approach to Estimate the Evolution of Fracture Energy and Tensile Softening Curve of Concrete from Very Early Age[J].Engineering Fracture Mechanics,2018,196:43-55.

黄煜镔,钱觉时.龄期和养护方式对高强混凝土力学性能的影响[J].硅酸盐通报,2007,26(3):427-430.

HOOVER C G,ULM F J.Experimental Chemo-Mechanics of Early-Age Fracture Properties of Cement Paste[J].Cement and Concrete Research,2015,75:42-52.

金南国,金贤玉,郑砚国,等.早龄期混凝土断裂性能和微观结构的试验研究[J].浙江大学学报(工学版),2005,39(9):1374-1377.

MATALLAH M,FARAH M,GRONDIN F,et al.Size-Independent Fracture Energy of Concrete at Very Early Ages by Inverse Analysis[J].Engineering Fracture Mechanics,2013,109:1-16.

孙启林,王利民,韩昌瑞,等.早龄期钢纤维混凝土抗裂性能测试与计算[J].混凝土,2006(8):25-27.

BORDELON A,KIM M.Early-Age Fiber-Reinforced Concrete Properties for Overlays:MPC-492[R].Orem, Utah:Utah Vally University,2018.

FU C Q,MA Q Y,JIN X Y,et al.Fracture Property of Steel Fiber Reinforced Concrete at Early Age[J].Computers and Concrete,2014,13(1):31-47.

慕儒,李辉,王晓伟,等.单向分布钢纤维增强水泥基复合材料(Ⅱ):制备及钢纤维增强作用[J].建筑材料学报,2015,18(3):104-112.

RILEM T C.Draft Recommendation:Determination of the Fracture Energy of Mortar and Concrete by Means of Three-Point Bend Tests on Notched Beams[J].Materials and Structures,1985,18(6):484.

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