超高性能纤维增强混凝土中钢纤维拔出行为研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (8): 2764-2772.

超高性能纤维增强混凝土中钢纤维拔出行为研究

龚明子¹, 潘阿馨^1,2, 张子龙³, 王涛¹, 饶先鹏¹, 陈晨¹, 黄伟^2,3

1.中交绿建(厦门)科技有限公司,厦门 361000;
2.福州大学土木工程学院,福州 350116;
3.福州大学先进制造学院,晋江 362200

收稿日期:2023-04-28 修订日期:2023-05-29 发布日期:2023-08-18
通信作者: 黄伟,博士,助理研究员。E-mail:WeiHuang@fzu.edu.cn
作者简介:龚明子(1986—),女,高级工程师。主要从事高性能土木工程材料的研究。E-mail:573212643@qq.com
基金资助:
“十三五”国家重点研发计划(2018YFC0705403);福建省自然科学基金(2021J05124);福建省中科院STS计划配套项目(2022T3032);泉州市科技计划项目(2021N176S);厦门市建设局建设科技项目(XJK2022-1-20)

Pull-Out Behaviour of Steel Fiber in Ultra-High Performance Fiber Reinforced Concrete

GONG Mingzi¹, PAN Axin^1,2, ZHANG Zilong³, WANG Tao¹, RAO Xianpeng¹, CHEN Chen¹, HUANG Wei^2,3

1. CCCC Green Construction (Xiamen) Technology Co., Ltd., Xiamen 361000, China;
2. College of Civil Engineering, Fuzhou University, Fuzhou 350116, China;
3. Institute of Advanced Manufacturing, Fuzhou University, Jinjiang 362200, China

Received:2023-04-28 Revised:2023-05-29 Published:2023-08-18

摘要/Abstract

摘要： 自行研发的纤维定位装置可较为精准地控制钢纤维的空间位置,基于此,研究了钢纤维埋置深度、直径和埋置角度对超高性能纤维增强混凝土(UHPFRC)中钢纤维拔出行为的影响。结果表明:随着钢纤维埋置深度增加,钢纤维最大拔出力、拔出功、最大拔出应力及钢纤维强度利用率均呈不断提高的趋势,而最大平均黏结强度却呈减小的趋势;随着钢纤维直径增加,钢纤维最大拔出力、拔出功和最大平均黏结强度相应增加,而钢纤维强度利用率和最大拔出应力均减小;随着钢纤维埋置角度增大,钢纤维最大拔出力和拔出功呈先上升后下降的趋势,分别在埋置角度为45°和30°时达到最大,而埋置角度为75°时,试件破坏模式表现为钢纤维拉断失效。

关键词: 超高性能纤维增强混凝土, 钢纤维, 拉拔, 埋置参数, 界面性能

Abstract: Based on the self-developed steel fiber position device that can accurately control the spatial position of steel fiber, the effects of steel fiber embedded depth, diameter and embedded angle on the pull-out behavior of steel fiber in ultra-high performance fiber reinforced concrete (UHPFRC) were studied. The results indicate that the maximum pull-out force, pull-out work, maximum pull-out stress and strength utilization rate of steel fiber increase with the increase of steel fiber embedded depth. However, the maximum average bond strength decreases with the increase of steel fiber embedded depth. With the increase of steel fiber diameter, the maximum pull-out force, pull-out work and maximum average bond strength of steel fiber increase correspondingly, while the strength utilization rate and maximum pull-out stress of steel fiber decrease. With the increase of steel fiber embedded angle, the maximum pull-out force and pull-out work of steel fiber increase first and then decrease. The maximum pull-out force and pull-out work reach the maximum value at 45° and 30° of embedded angle, respectively. When the embedded angle is 75°, the failure mode of specimen is that the steel fiber is broken.

Key words: ultra-high performance fiber reinforced concrete, steel fiber, pull-out, embedded parameter, interface performance

中图分类号:

TU528

龚明子, 潘阿馨, 张子龙, 王涛, 饶先鹏, 陈晨, 黄伟. 超高性能纤维增强混凝土中钢纤维拔出行为研究[J]. 硅酸盐通报, 2023, 42(8): 2764-2772.

GONG Mingzi, PAN Axin, ZHANG Zilong, WANG Tao, RAO Xianpeng, CHEN Chen, HUANG Wei. Pull-Out Behaviour of Steel Fiber in Ultra-High Performance Fiber Reinforced Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(8): 2764-2772.

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