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Bond performance of Steel-CFRP Bar reinforced Coral Concrete beams

Wang, L., Shen, N., Zhang, M., Fu, F. ORCID: 0000-0002-9176-8159 and Qian, K. (2020). Bond performance of Steel-CFRP Bar reinforced Coral Concrete beams. Construction and Building Materials, 245, 118456.. doi: 10.1016/j.conbuildmat.2020.118456

Abstract

Steel-Carbon Fiber Reinforced Polymer (SCFRP) bar provides a new way to solve the shortcomings of poor ductility and low stiffness of FRP reinforced concrete members. In order to understand the bond performance between SCFRP bars and coral concrete, 39 pull-out tests of SCFRP reinforced coral concrete is performed. Different parameters such as the types, diameters and bond lengths of SCFRP reinforcements were investigated. The failure modes, failure mechanism, stress process and bond-slip relationship of the specimens were analyzed. The failure modes of steel bar pull-out can be divided into steel core pull-out before yielding and steel core pull-out after yielding. The concrete splitting failure modes can be divided into coral concrete splitting before steel core yielding and Coral concrete splits after steel core yielding. There are four characteristic points in the bond slip curve: elastic slip point, yield slip point, peak slip point and residual slip point. The bond slip model of SCFRP reinforced coral concrete was developed in this paper using coefficients of slip before steel core yields and slip after steel core yields are 0.86 and 1.0 respectively, which can describe the bond slip behavior between SCFRP and concrete more accurately.

Publication Type: Article
Additional Information: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Publisher Keywords: SCFRP bar; coral concrete beam; Pull out test; Bond
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Mathematics, Computer Science & Engineering > Engineering > Civil Engineering
Date Deposited: 13 Feb 2020 16:20
URI: https://openaccess.city.ac.uk/id/eprint/23725
[img] Text - Accepted Version
This document is not freely accessible until 22 February 2021 due to copyright restrictions.
Available under License Creative Commons Attribution Non-commercial No Derivatives.

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