UHPC中纤维间距折减效应试验与模拟研究

doi:10.11896/cldb.24070154

材料导报

2025, Vol. 39

Issue (14): 24070154-8 https://doi.org/10.11896/cldb.24070154

无机非金属及其复合材料

UHPC中纤维间距折减效应试验与模拟研究

杨雨¹, 黄斌^2,3, 黄伟^1,*, 龚明子^2,3, 潘阿馨^1,2, 陈庆丰¹, 陈宝春^1,4, 韦建刚^1,4

1 福州大学土木工程学院,福州 350108
2 中交一公局绿建(厦门)科技有限公司,福建厦门 361000
3 中交一公局厦门工程有限公司,福建厦门 361000
4 福建理工大学土木工程学院,福州 350118

Experimental and Simulation Study on Fiber Spacing Reduction Effect in UHPC

YANG Yu¹, HUANG Bin^2,3, HUANG Wei^1,*, GONG Mingzi^2,3, PAN Axin^1,2, CHEN Qingfeng¹, CHEN Baochun^1,4, WEI Jiangang^1,4

1 College of Civil Engineering, Fuzhou University, Fuzhou 350108, China
2 CCCC Green Construction (Xiamen) Technology Co., Ltd., Xiamen 361000, Fujian, China
3 CCCC Xiamen Engineering Co., Ltd., Xiamen 361000, Fujian, China
4 College of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China

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摘要为了深入研究纤维与超高性能混凝土(UHPC)之间的界面性能,开展了纤维拉拔试验,并利用软件ABAQUS建立双纤维拔出试验的有限元模型,对钢纤维从UHPC基体中的拔出过程进行数值模拟。在验证有限元模型有效性和合理性的基础上进行参数分析,着重研究了钢纤维埋置间距对纤维-UHPC基体之间界面性能的影响,提出了间距折减效应、最大间距折减率和适宜间距。最终,根据结果拟合得到了界面峰值粘结强度计算公式。结果表明:随着埋置间距的增加,拔出功和峰值拔出应力均呈上升的趋势,不同埋置深度和钢纤维直径的峰值拔出力均呈先上升后近似水平发展的趋势;适宜间距值和最大间距折减率均随着钢纤维直径与埋置深度的增加而增大;当钢纤维埋置间距小于适宜间距且逐渐变小时,不同长度、直径的钢纤维与基体间的界面峰值粘结强度均呈近似线性下降的趋势。

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	杨雨
	黄斌
	黄伟
	龚明子
	潘阿馨
	陈庆丰
	陈宝春
	韦建刚

关键词: 超高性能混凝土(UHPC) 界面性能数值模拟间距折减效应适宜间距

Abstract: In order to further study the interfacial performance between fiber and ultra-high performance concrete(UHPC), the fiber pull-out test was carried out and the finite element model of the double fiber pull-out test was established by using the software ABAQUS. The pull-out process of steel fiber from UHPC matrix was numerically simulated. On the basis of verifying the validity and rationality of the finite element model, the parameter analysis was carried out, and the influence of the embedded spacing of steel fiber on the interface performance between fiber and UHPC matrix was emphatically studied. The spacing reduction effect, the maximum spacing reduction rate and the suitable spacing are proposed. Finally, the calculation formula of interfacial peak bond strength was obtained according to the results. The results show that with the increase of embedding spacing, the pull-out work and peak pull-out stress show an upward trend, and the peak pull-out force of different embedding depths and steel fiber diameters increases first and then develops approximately horizontally. The suitable spacing value and the maximum spacing reduction rate increase with the increase of steel fiber diameter and embedding depth. When the embedded spacing of steel fiber is less than the suitable spacing and gradually becomes smaller, the interfacial peak bonding strength between steel fiber with different lengths and diameters and the matrix is approximately linearly decreasing.

Key words: ultra-high performance concrete(UHPC) interfacial performance numerical simulation spacing reduction effect suitable spacing

出版日期: 2025-07-25 发布日期: 2025-07-29

ZTFLH:

TU528

基金资助: 国家自然科学基金(52278158); 福建省自然科学基金(2021J05124); 福建省交通运输厅交通运输科技项目(202268); 厦门市建设局建设科技项目(XJK2022-1-20)

通讯作者: * 黄伟,博士,福州大学土木工程学院助理研究员、硕士研究生导师。主要从事超高性能/超高延性水泥基复合材料、水泥水化及微结构演变、固体废弃物综合利用、混凝土海洋环境耐久性、高性能混凝土外加剂等相关研究工作。WeiHuang@fzu.edu.cn

作者简介: 杨雨,福州大学土木工程学院硕士研究生,在黄伟导师的指导下进行研究。目前主要研究领域为超高性能混凝土。

引用本文:

杨雨, 黄斌, 黄伟, 龚明子, 潘阿馨, 陈庆丰, 陈宝春, 韦建刚. UHPC中纤维间距折减效应试验与模拟研究[J]. 材料导报, 2025, 39(14): 24070154-8.
YANG Yu, HUANG Bin, HUANG Wei, GONG Mingzi, PAN Axin, CHEN Qingfeng, CHEN Baochun, WEI Jiangang. Experimental and Simulation Study on Fiber Spacing Reduction Effect in UHPC. Materials Reports, 2025, 39(14): 24070154-8.

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https://www.mater-rep.com/CN/10.11896/cldb.24070154 或 https://www.mater-rep.com/CN/Y2025/V39/I14/24070154

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