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[1]聂立力,周 迅,熊 伟.混杂纤维超高性能混凝土的弯曲力学性能研究[J].武汉工程大学学报,2024,46(03):330-336.[doi:10.19843/j.cnki.CN42-1779/TQ.202307008]
 NIE Lili,ZHOU Xun,XIONG Wei.Flexural property of fiber-doped ultra-high performance concrete[J].Journal of Wuhan Institute of Technology,2024,46(03):330-336.[doi:10.19843/j.cnki.CN42-1779/TQ.202307008]
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混杂纤维超高性能混凝土的弯曲力学性能研究(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
46
期数:
2024年03期
页码:
330-336
栏目:
资源与土木工程
出版日期:
2024-06-30

文章信息/Info

Title:
Flexural property of fiber-doped ultra-high performance concrete
文章编号:
1674 - 2869(2024)03 - 0330 - 07
作者:
聂立力周 迅熊 伟
中国市政工程中南设计研究总院有限公司,湖北 武汉 430010
Author(s):
NIE Lili ZHOU Xun XIONG Wei
Central & Southern China Municipal Engineering Design and Research Institute Co., Ltd, Wuhan 430010, China
关键词:
超高性能混凝土四点弯曲试验倒推分析法初裂强度极限强度
Keywords:
ultra-high performance concrete four-point bending test inverse analysis method cracking strength ultimate strength
分类号:
U444
DOI:
10.19843/j.cnki.CN42-1779/TQ.202307008
文献标志码:
A
摘要:
通过超高性能混凝土(UHPC)棱柱体的四点弯曲试验,研究了4种纤维掺量的长直型、端钩型和混合型钢纤维UHPC的弯拉性能,并与倒推分析法得到的UHPC拉伸性能进行对比。结果表明:纤维类型和纤维掺量对UHPC棱柱体弯拉性能的弹性阶段无明显影响,其影响主要作用在裂缝发展阶段;混合型纤维UHPC对弯拉性能的裂缝发展阶段改良效果最优,且混合型纤维提供的抗力效果较其他类型纤维更优。倒推分析法的初裂强度高于轴拉等效初裂强度,两者比值介于1.03~1.19。

Abstract:
Flexural properties of long straight, hooked end, and hybrid steel fiber ultra-high performance concrete (UHPC) with four different fiber contents were investigated by four-point bending tests of UHPC prisms. The results were compared to the tensile properties of UHPC obtained using an inverse analysis method. It was found that fiber type and content had a minimal impact on the elastic stage of UHPC prism flexural properties but significantly affected the post-crack stage. The hybrid fiber UHPC showed the most optimal reinforcement effect on the post-crack stage, with hybrid fibers exhibiting superior resistance compared to other fiber types. The cracking strength determined by the inverse analysis method was higher than the direct-tension equivalent cracking strength, with a ratio ranging from 1.03 to 1.19.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2023-07-08
基金项目:湖北省建设科技计划项目(2023011)
作者简介:聂立力,硕士,高级工程师。Email: 43386680@qq.com
引文格式:聂立力, 周迅, 熊伟. 混杂纤维超高性能混凝土的弯曲力学性能研究[J]. 武汉工程大学学报,2024,46(3):330-336.

更新日期/Last Update: 2024-07-02