184 0

Bond stress between conventional reinforcement and steel fiber reinforced reactive powder concrete

Title
Bond stress between conventional reinforcement and steel fiber reinforced reactive powder concrete
Author
최창식
Keywords
Fibre/matrix bond; Strength; Mechanical testing
Issue Date
2016-02
Publisher
ELSEVIER SCI LTD
Citation
CONSTRUCTION AND BUILDING MATERIALS, v. 112, Page. 825-835
Abstract
In this study, we investigated bond stress between steel -fibre -reinforced reactive powder concrete (SFRPC) and conventional reinforcement to determine specific values for design bond stress. Test results were compared with previously suggested analysis methods. Tests were carried out using the direct pull-out test. The main variables are compressive strength of the concrete, concrete cover, and inclusion ratio of steel fibre. The increase rate of ultimate bond stress between SF-RPC and conventional reinforcement was decreased although the ultimate bond stress was increased with increasing compressive strength of the SF-RPC matrix. The effect of the concrete cover on ultimate bond stress and its increase rate was similar to that of the compressive strength of concrete. However, an even more significant change was observed with change in concrete cover. We also observed an effect of steel fibre inclusion. Inclusion of a 1% volume fraction of steel fibre increases the ultimate bond stress by two times the bond stress between the plain RPC matrix and conventional reinforcement. However, a 2% steel fibre volume fraction does not increase the ultimate bond stress significantly. In order to obtain safety for bond design of SF-RPC precast members, previously suggested analysis methods for ultimate bond stress and empirical equations for ultimate bond stress were evaluated. Most empirical ultimate bond stress equations cannot estimate the ultimate bond stress accurately. Analysis methods suggested by Tepfers can predict the ultimate bond stress more accurately than these empirical equations because the RPC matrix behaves as a linear elastic material until experiencing splitting failure. (C) 2016 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0950061816301775?via%3Dihubhttp://hdl.handle.net/20.500.11754/31875
ISSN
0950-0618; 1879-0526
DOI
10.1016/j.conbuildmat.2016.02.118
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE