多端钩型钢纤维混凝土劈拉强度的试验研究

陈刚; 史命; 李瑞然; 肖旭; 白晶

doi:10.13204/j.gyjzG19111504

多端钩型钢纤维混凝土劈拉强度的试验研究

doi: 10.13204/j.gyjzG19111504

陈刚¹,
史命^2, ,,
李瑞然³,
肖旭⁴,
白晶⁴

1. 河南工程学院土木工程学院, 郑州 451191;
2. 中国葛洲坝集团股份有限公司, 武汉 430000;
3. 郑州大学土木工程学院, 郑州 450001;
4. 郑州大学水利科学与工程学院, 郑州 450001

基金项目:

国家自然科学基金资助项目（51809085）；河南省科技攻关项目（202102310254）。

详细信息

作者简介:
陈刚,男,1984年出生,博士,讲师。

通讯作者:
史命,528991271@qq.com。

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出版历程
- 收稿日期: 2019-11-15

EXPERIMENTAL STUDY ON SPLITTING TENSILE STRENGTH OF CONCRETE REINFORCED BY STEEL FIBERS WITH MULTIPLE HOOKED-ENDS

CHEN Gang¹,
SHI Ming^{2
, ,},
LI Ruiran³,
XIAO Xu⁴,
BAI Jing⁴

1. College of Civil Engineering, Henan University of Engineering, Zhengzhou 451191, China;
2. China Gezhouba Group Co., Ltd., Wuhan 430000, China;
3. School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China;
4. School of Water Resources Science and Engineering, Zhengzhou University, Zhengzhou 450001, China

摘要

摘要: 通过对3D型单端钩钢纤维以及4D、5D型多端钩钢纤维增强混凝土的劈裂抗拉强度试验，对比研究混凝土基体强度、钢纤维体积率和钢纤维类型对劈拉强度的影响。结果表明：钢纤维改善了混凝土破坏时的完整性；对于混凝土强度等级为C40、C60的基体，钢纤维的作用均得以发挥，提高了钢纤维混凝土的劈拉强度；钢纤维体积率从0%提高到1.4%时，钢纤维混凝土的劈拉强度随之提高，且4D、5D型钢纤维增强混凝土的劈拉强度高于3D型钢纤维。最后，基于JG/T 472—2015《钢纤维混凝土》提出多端钩型钢纤维增强混凝土的劈拉强度计算方法，计算结果与试验结果较为吻合。
- 钢纤维 /
- 混凝土 /
- 劈拉强度
Abstract: Splitting tensile test was conducted on concrete reinforced by 3D steel fibers with single hooked end, as well as 4D and 5D steel fibers with multiple hooked-ends. Then the effects of concrete matrix strength, volume fractions and types of steel fibers on the splitting tensile strength of steel-fiber-reinforced concrete (SFRC) were studied. The results showed that steel fibers could improve the unity of concrete after being damaged. To concrete of grade C40 and C60, the reinforcement of steel fibers could be exploited, thus the splitting tensile strength of SFRC was increased. Also, increasing the volume fractions of steel fibers from 0% to 1.4% was beneficial to improvement of splitting tensile strength of SFRC, especially that the comcrete with 4D and 5D steel fibers was better than that one with 3D steel fibers. Finally, according to the standard JG/T 472-2015 Steel Fiber Reiforced Concrete, a calculation method to predict splitting tensile strength of concrete reinforced by steel fibers with multiple hooked-ends was proposed and showed a good agreement with the test results.
- steel fiber /
- concrete /
- splitting tensile strength

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参考文献(7)

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