[1]洪铁东,张大山,王卫华,等.高强自密实再生块体混凝土单轴受压声发射特性[J].华侨大学学报(自然科学版),2021,42(3):351-357.[doi:10.11830/ISSN.1000-5013.202009045]
　HONG Tiedong,ZHANG Dashan,WANG Weihua,et al.Acoustic Emission Characteristics of High-Strength Self-Compacting Recycled Lump Concrete Under Uniaxial Compression[J].Journal of Huaqiao University(Natural Science),2021,42(3):351-357.[doi:10.11830/ISSN.1000-5013.202009045]
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高强自密实再生块体混凝土单轴受压声发射特性()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第42卷
期数:
2021年第3期
页码:
351-357
栏目:
出版日期:
2021-05-20

文章信息/Info

Title:
Acoustic Emission Characteristics of High-Strength Self-Compacting Recycled Lump Concrete Under Uniaxial Compression
文章编号:
1000-5013(2021)03-0351-07
作者:
洪铁东1; 2;  张大山1; 2;  王卫华1; 2;  蔡敏伟1; 2
1. 华侨大学 土木工程学院, 福建 厦门 361021;2. 华侨大学 厦门市抗火综合防灾工程技术研究中心, 福建 厦门 361021
Author(s):
HONG Tiedong1; 2;  ZHANG Dashan1; 2; WANG Weihua1; 2;  CAI Minwei1; 2
1. College of Civil Engineer, Huaqiao University, Xiamen 361021, China; 2. Xiamen Engineering Research Center for Fire Resistance and Disaster Prevention, Huaqiao University, Xiamen 361021, China
关键词:
声发射;  自密实再生块体混凝土;  能量;  活跃系数;  b值
Keywords:
acoustic emission;  self-compacting recycled lump concrete;  energy;  active coefficient;  b value
分类号:
TU375.2
DOI:
10.11830/ISSN.1000-5013.202009045
文献标志码:
A
摘要:
为研究高强自密实再生块体混凝土单轴受压声发射特性,对取代率分别为0%,10%,20%的立方体混凝土试块进行轴心受压试验.将受压破坏过程分为4个阶段,引入活跃系数对能量进行分析,并通过b值-能量分析判断裂纹的开展程度和试块的损伤情况.结果表明:随着取代率的提高,峰值应力前声发射活动强度显著增加,能量越早出现爆炸性增长;活跃系数随应力进程先升高后降低,活跃系数可作为混凝土是否适合继续服役的判断标准;通过b值-能量分析能够准确地判断裂纹的开展程度和试块的损伤情况.
Abstract:
In order to study the acoustic emission characteristics of high-strength self-compacting recycled lump concrete under uniaxial compression, the axial compression tests were carried out on the cube concrete specimens with replacement rates of 0%, 10% and 20% respectively. The compression failure process was divided into four stages, the active coefficient was introduced to analyze the energy, and according to thebvalue energy analysis, the crack development degree and the damage condition of the specimens were judged. The results show that: with increasing the replacement rates, the intensity of acoustic emission activity before peak stress increases significantly, and the energy increases explosively earlier. The active coefficient initially increases and then decreases with the stress process, which could be used as a criterion to judge whether the concrete is suitable for continuous service. According to the b value energy analysis, the crack development degree and the damage condition of the specimens could be accurately judge.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2020-09-29
通信作者: 王卫华(1980-),男,副教授,博士,主要从事钢-混凝土组合结构的研究.E-mail:whwang@hqu.edu.cn.
基金项目: 国家自然科学基金资助项目(51208217); 福建省泉州市科技计划项目(2017T002); 华侨大学研究生科研创新基金资助项目(18013086011)http://www.hdxb.hqu.edu.cn
更新日期/Last Update: 2021-05-20