Bond behaviour at high temperatures between concrete and CFRP or steel strengthening bars applied according to the Embedded Through-Section (ETS) technique

材料科学 债券 章节(排版) 结构工程 复合材料 法律工程学 工程类 计算机科学 财务 经济 操作系统
作者
Adriana S. Azevedo,João P. Firmo,João R. Correia
出处
期刊:Cement & Concrete Composites [Elsevier BV]
卷期号:151: 105580-105580 被引量:3
标识
DOI:10.1016/j.cemconcomp.2024.105580
摘要

The embedded through-section (ETS) technique is an efficient shear-strengthening method for reinforced concrete (RC) structures, in which fibre reinforced polymer (FRP) or steel bars are bonded in holes predrilled in RC members. Compared to conventional FRP strengthening methods, ETS systems are expected to present better performance when exposed to high temperatures/fire, due to the insulation provided by concrete to both adhesive and FRP/steel components. Yet, the mechanical/bond properties of the strengthening materials are highly affected when the glass transition temperatures (Tg) of their components is attained/exceeded; however, there are no studies available about the influence of elevated temperatures on the performance of ETS systems. This paper presents an experimental study that addresses the effects of elevated temperatures on the bond behaviour of ETS systems – pull-out tests were conducted on steel rebars or sand-coated carbon-FRP (CFRP) rods bonded with epoxy adhesive on concrete cylinders at temperatures up to 90 °C. The results obtained confirm that the strength and stiffness of the bonded interfaces decrease when the temperature in the adhesive approaches/exceeds its Tg; moreover, with sand-coated CFRP rods, failure was also influenced by the bond between the sand coating and the CFRP rods core, and thus the average bond capacity was significantly reduced for temperatures below the Tg of the epoxy adhesive. Bond-slip relations were calibrated for different elevated temperatures for the steel/CFRP-concrete interfaces using data obtained from the pull-out tests; these bond laws can be used to simulate the mechanical behaviour of ETS-strengthened-RC members subjected to elevated temperatures.
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
香蕉觅云应助Moon采纳,获得10
刚刚
白沐风完成签到,获得积分10
刚刚
情怀应助asdfqwer采纳,获得10
1秒前
海盐发布了新的文献求助10
1秒前
可爱的函函应助loey采纳,获得10
2秒前
momo完成签到,获得积分10
2秒前
保卫时光发布了新的文献求助10
2秒前
TP完成签到,获得积分10
3秒前
3秒前
guozao发布了新的文献求助10
4秒前
CYY发布了新的文献求助10
4秒前
张达发布了新的文献求助10
5秒前
领导范儿应助上官又莲采纳,获得10
6秒前
Lucas应助Vv采纳,获得10
6秒前
仙笛童神完成签到,获得积分10
6秒前
上官若男应助张达采纳,获得10
9秒前
9秒前
wkx完成签到,获得积分10
11秒前
12秒前
Wenson发布了新的文献求助10
12秒前
柏炳完成签到,获得积分10
12秒前
保卫时光完成签到,获得积分10
12秒前
鱼丸发布了新的文献求助10
14秒前
15秒前
萝肆夕完成签到,获得积分10
16秒前
wenhao发布了新的文献求助10
17秒前
19秒前
20秒前
21秒前
柏炳发布了新的文献求助10
22秒前
标致谷菱完成签到,获得积分10
22秒前
33应助Vv采纳,获得10
24秒前
感动的广缘关注了科研通微信公众号
24秒前
24秒前
24秒前
范冰冰发布了新的文献求助10
24秒前
26秒前
26秒前
loey发布了新的文献求助10
26秒前
传奇3应助Trends采纳,获得10
26秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Effective Learning and Mental Wellbeing 400
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 3976107
求助须知:如何正确求助?哪些是违规求助? 3520330
关于积分的说明 11202435
捐赠科研通 3256819
什么是DOI,文献DOI怎么找? 1798504
邀请新用户注册赠送积分活动 877642
科研通“疑难数据库(出版商)”最低求助积分说明 806496