Experimental study of dynamic bond behaviour between corroded steel reinforcement and concrete

钢筋 材料科学 复合材料 债券 结构工程 钢筋混凝土 工程类 财务 经济
作者
Yu Liu,Hong Hao,Yifei Hao,Jian Cui
出处
期刊:Construction and Building Materials [Elsevier BV]
卷期号:356: 129272-129272 被引量:10
标识
DOI:10.1016/j.conbuildmat.2022.129272
摘要

• The dynamic bond behavior between corroded steel bars and concrete was investigated. • The failure modes, ultimate bond strength, dynamic bond-slip relationships were discussed. • The empirical formulae of dynamic increase factors (DIFs) of the ultimate bond strength corresponding to different corrosion levels and strain rates were proposed. • Deterioration of ultimate bond force with respect to the corrosion degree at different strain rates was discussed. Corrosion damage of steel reinforcement is detrimental to the load-carrying capacity of reinforced concrete structures because it not only reduces the cross sectional area and strength of reinforcement bars, but also weakens the bond between reinforcement and concrete. Many studies have investigated the effects of corrosion on reinforcement loss and static bond strength between reinforcement and concrete, but no study of the influence of corrosion damage on dynamic bond strength has been reported yet. In this study, laboratory tests were conducted to investigate the effect of corrosion on the bond behaviour between steel reinforcement and concrete subjected to high rate dynamic load. Accelerated corrosion damage was induced to steel bars embedded in concrete specimens under laboratory condition. The bond parameters of steel reinforcement and concrete including the ultimate bonding load and bond-slip relationship corresponding to the various strain rates and corrosion degrees were obtained through dynamic pull-out tests. The empirical formulae of dynamic increase factors (DIFs) of the ultimate bonding strength corresponding to different corrosion levels and strain rates were proposed. The experimental results show that the strain rate effect on bonding behaviour is prominent irrespective of the corrosion level. The increase in the ultimate bonding strength with strain rate for the heavily corroded reinforcement ( η = 5 %-10 %) is more prominent than that for the slightly corroded reinforcement ( η = 0 %-5%). The decrease in the ultimate pull-out force caused by the corrosion damage at high strain rate is more pronounced than that at low strain rate. Corrosion-induced crack and the tensile strength of concrete have significant effect on both the static and dynamic bond behaviours. The results presented in the paper can be used for better modelling and prediction of the responses of corroded reinforced concrete structures subjected to dynamic loads.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
王强发布了新的文献求助10
刚刚
晨心发布了新的文献求助10
刚刚
孙燕应助机智毛豆采纳,获得10
刚刚
1秒前
英俊的铭应助猪猪hero采纳,获得10
2秒前
johnny发布了新的文献求助10
2秒前
michi完成签到,获得积分10
2秒前
Lucas应助科研小麻瓜采纳,获得10
2秒前
阿奇应助西瓜汁采纳,获得10
2秒前
wan发布了新的文献求助30
2秒前
打打应助zhouzhou采纳,获得10
3秒前
4秒前
跳跃的太君完成签到,获得积分10
4秒前
凌青烟发布了新的文献求助10
5秒前
MESSY发布了新的文献求助10
5秒前
loco发布了新的文献求助30
5秒前
爆米花应助犹豫花卷采纳,获得10
5秒前
爱吃键盘的番茄侠完成签到,获得积分20
6秒前
SciGPT应助102755采纳,获得10
6秒前
研友_VZG7GZ应助Sir.夏季风采纳,获得10
6秒前
小太阳完成签到,获得积分10
7秒前
量子星尘发布了新的文献求助20
8秒前
852应助内向怀曼采纳,获得10
8秒前
丘比特应助快乐小子采纳,获得10
9秒前
Linda完成签到,获得积分10
9秒前
文献文献文献完成签到,获得积分10
10秒前
10秒前
nanye完成签到,获得积分20
10秒前
权又菡完成签到,获得积分10
11秒前
11秒前
13秒前
13秒前
14秒前
XY完成签到,获得积分10
14秒前
牛牛牛应助Friday采纳,获得10
14秒前
15秒前
河狐狐完成签到,获得积分10
15秒前
16秒前
16秒前
16秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
A new approach to the extrapolation of accelerated life test data 1000
《模拟电子技术基础:系统方法》 500
北师大毕业论文 基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 390
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Robot-supported joining of reinforcement textiles with one-sided sewing heads 360
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4011633
求助须知:如何正确求助?哪些是违规求助? 3551418
关于积分的说明 11308628
捐赠科研通 3285620
什么是DOI,文献DOI怎么找? 1811122
邀请新用户注册赠送积分活动 886781
科研通“疑难数据库(出版商)”最低求助积分说明 811653