循环荷载作用下超高性能纤维混凝土自感知性能

周中一; 赵宏升; 刘岩; 陈建伟; 张文明; 洪雅妮

doi:10.3969/j.issn.0258-2724.20240649

循环荷载作用下超高性能纤维混凝土自感知性能

doi: 10.3969/j.issn.0258-2724.20240649

周中一^{1, 2, 3,},
赵宏升¹,
刘岩¹,
陈建伟¹,
张文明^{2, 3},
洪雅妮^{2, 3}

1.
华北理工大学建筑工程学院，河北唐山 063210
2.
中国地震局工程力学研究所地震工程与工程振动重点试验室，黑龙江哈尔滨 150080
3.
地震灾害防治应急管理部重点试验室，黑龙江哈尔滨 150080

基金项目: 国家重点研发计划（2022YFF0608904）

详细信息

作者简介:
周中一（1980—），男，研究员，博士，研究方向为工程结构抗震，E-mail：zhouzy@iem.ac.cn

中图分类号: TU528;TB333
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- 被引次数: 0
出版历程
- 收稿日期: 2024-12-08
- 修回日期: 2025-04-08
- 网络出版日期: 2025-08-05

Self-Sensing Performance of Ultra-High Performance Fiber-Reinforced Concrete Under Cyclic Loading

ZHOU Zhongyi^{1, 2, 3
,},
ZHAO Hongsheng¹,
LIU Yan¹,
CHEN Jianwei¹,
ZHANG Wenming^{2, 3},
HONG Yani^{2, 3}

1.
College of Civil and Architectural Engineering, North China University of Science and Technology, Tangshan 063210, China
2.
Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
3.
Key Laboratory of Earthquake Disaster Mitigation, Ministry of Emergency Management, Harbin 150080, China

摘要

摘要:
为研究复掺钢纤维和多壁碳纳米管(MWCNTs)的超高性能混凝土(UHPC)在不同循环应力幅值下的自感知性能，对钢纤维体积掺量为2%、不同MWCNTs掺量下的UHPC在不同循环应力幅值下的自感知性能进行试验研究. 结果表明：UHPC的初始电阻率随MWCNTs掺量的增加先升高后降低，加入0.15%的MWCNTs能提高UHPC的导电性；MWCNTs的加入可以提高试样的重复性，当MWCNTs掺量为0.15%时，试样具有最优的重复性，重复性系数为0.019，且交流电阻变化率与应力之间具有较优的线性关系，线性度为0.97；试样 UHPC0、UHPC0.05的应力灵敏度和应变灵敏度随应力的增加先增加后减小，而试样UHPC0.1、UHPC0.15的应力灵敏度和应变灵敏度则随着应力的增加呈逐渐减小的趋势；试样UHPC0.15在不同循环应力幅值下最高应变灵敏度和应力灵敏度分别为71.6%和0.16%/MPa，均出现在应力为10 MPa时；当MWCNTs掺量为0.15%时，UHPC具有最优的自感知性能.
- 多壁碳纳米管 /
- 钢纤维 /
- 超高性能混凝土 /
- 循环荷载 /
- 自感知性能
Abstract:
To study the self-sensing performance of ultra-high performance concrete (UHPC) mixed with steel fibers and multi-walled carbon nanotubes (MWCNTs) under different cyclic stress amplitudes, experimental studies were conducted on UHPC specimens with a steel fiber volume content of 2% and varying MWCNT contents. The results show that the initial resistivity of UHPC increases first and then decreases with the increase in MWCNT content, and the addition of 0.15% MWCNTs improves the conductivity of UHPC. When the MWCNT content is 0.15%, the sample exhibits optimal repeatability, with a repeatability coefficient of 0.019, and the linearity change of alternating current (AC) resistance presents a strong linear relationship with stress, with a linearity of 0.97. The stress sensitivity and strain sensitivity of the samples UHPC0 and UHPC0.05 first increase and then decrease with the increase in stress, while the stress sensitivity and strain sensitivity of samples UHPC0.1 and UHPC0.15 show a gradually decreasing trend. The maximum strain sensitivity and stress sensitivity of UHPC0.15 are 71.6% and 0.16%/MPa under different cyclic stress amplitudes, both appearing at a stress of 10 MPa. When the content of MWCNTs is 0.15%, UHPC exhibits the best self-sensing performance.
- multi-walled carbon nanotube /
- steel fiber /
- ultra-high performance concrete /
- cyclic loading /
- self-sensing performance

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图 1 水泥、石英粉和硅灰的筛分曲线

Figure 1. Sieving curves of cement, quartz powder, and silica fume

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图 2 原材料SEM图

Figure 2. SEM images of raw materials

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图 3 电极在试样中的位置

Figure 3. Position of electrode in sample

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图 4 铜网电极

Figure 4. Copper mesh electrodes

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图 5 实验设备和采集仪器

Figure 5. Experimental equipment and acquisition instruments

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图 6 UHPC流动度测量结果

Figure 6. Fluidity measurement results of UHPC

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图 7 抗压强度和初始电阻率测量结果

Figure 7. Compressive strength and initial resistivity test results

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图 8 不同循环压缩加载幅值下试样的交流电阻变化率与应力/应变的响应曲线

Figure 8. AC resistance rate of change and response curves of stress/strain of sample under different cyclic compressive loading amplitudes

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图 9 不同MWCNTs掺量下UHPC的重复性系数

Figure 9. Repeatability coefficient of UHPC under different MWCNT contents

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图 10 不同MWCNTs掺量下的UHPC的线性度

Figure 10. Linearity of UHPC at different MWCNT contents

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图 11 不同MWCNTs掺量下的UHPC的应变/应力灵敏度

Figure 11. Strain/stress sensitivity of UHPC under different MWCNT contents

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表 1 水泥、硅灰和石英粉的化学组成

Table 1. Chemical composition of cement, silica fume, and quartz powder (Mass fraction)

材料类型	化学成分/%										表面积/（m²·g⁻¹）
材料类型	Al₂O₃	SiO₂	CaO	TiO₂	MgO	Na₂O	K₂O	Fe₂O₃	SO₃	L.O.I.	表面积/（m²·g⁻¹）
水泥	5.02	19.99	64.47	0.21	1.64	0.21	0.72	2.99		2.82	2.0774
硅灰	0.15	95.15	0.34	0.02	0.49	0.27	0.58	0.08	0.21	2.51	28.3000
石英粉	0.03	99.81	0.02			0.01	0.01	0.019		0.06	0.8445

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表 2 MWCNTs物理参数

Table 2. Physical properties of MWCNTs

名称	外径/nm	长度/μm	表面积/（m²•g⁻¹）	纯度/%	颜色
取值	5～15	10～30	220～300	>99	黑色

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表 3 钢纤维力学性能

Table 3. Mechanical properties of steel fibers

名称	长度/ mm	直径/ μm	抗拉强度/MPa	弹性模量/GPa	密度/ （g•cm⁻³）
取值	13	200	2750	210	7.85

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表 4 UHPC配合比

Table 4. Mix proportions of UHPC kg/m³

试件编号	单位重量
试件编号	水泥	硅灰	石英粉	水	减水剂	钢纤维	碳纳米管
UHPC0	890	220	980	199.8	55	165	0
UHPC0.05	890	220	980	199.8	55	165	0.445
UHPC0.1	890	220	980	199.8	55	165	0.89
UHPC0.15	890	220	980	199.8	55	165	1.335

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表 5 试样的综合评价指标（归一化）

Table 5. Comprehensive evaluation index of samples (normalization)

试样编号	G_ε	G_σ	r	L	S
UHPC0	1.00	1.00	0	0.29	0.629
UHPC0.05	0	0	0.45	1.00	0.235
UHPC0.10	0.17	0.03	0.83	0	0.309
UHPC0.15	0.81	0.54	1.00	0.59	0.764

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循环荷载作用下超高性能纤维混凝土自感知性能

doi: 10.3969/j.issn.0258-2724.20240649

作者简介: 周中一（1980—），男，研究员，博士，研究方向为工程结构抗震，E-mail：zhouzy@iem.ac.cn

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出版历程

Self-Sensing Performance of Ultra-High Performance Fiber-Reinforced Concrete Under Cyclic Loading

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出版历程

目录

作者简介:
周中一（1980—），男，研究员，博士，研究方向为工程结构抗震，E-mail：zhouzy@iem.ac.cn