Effect of corrosion on bond performance of corroded pretensioned prestressed concrete beams

Author:

Zhang Jianren1,Yi Ju1,Ma Yafei1,Wang Lei1,Peng Hui1

Affiliation:

1. Changsha University of Science & Technology, Changsha, China

Abstract

<p>The bond behaviour between corroded strand and concrete in pre-tensioned prestressed concrete beam is investigated experimentally in the present paper. A total of nine pre-tensioned beams are fabricated and eight of them are accelerated to concrete cracking, with one uncorroded beam as control. Data on the distribution of corrosion-induced crack, force-slip responses, and failure modes are obtained. Effects of strand corrosion on the load-slip curves are studied. At last, the final failure modes and the ultimate strength of the beams are analysed. Experimental results show that the bond stiffness and strength do not decrease until the corrosion loss and crack width exceeds 5.1% and 0.27 mm, respectively. The failure mode of beams change with the increasing of strand corrosion. When the corrosion loss is less than 5.1%,beams PS0-PS4 fail in concrete crushing, accompanying with strand yielding. When the corrosion loss exceeds 6.91%, the beams fail in strand rupturing without detecting yielding plateau. The degradation of strand tensile strength plays a more important role than degradation of bond strength when strand reaches certain corrosion loss.</p>

Publisher

International Association for Bridge and Structural Engineering (IABSE)

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3