Bond Mechanism of Near-Surface-Mounted Fiber-Reinforced Polymer Bars
for Flexural Strengthening of Concrete Structures
T. Hassan, and S. Rizkalla. ACI Structural Journal, 101 (6):
830--839(November 2004)
Abstract
This paper presents both experimental and analytical investigations
undertaken to evaluate bond characteristics of near-surface-mounted
(NSM) carbon fiber-reinforced polymer (CFRP) bars. A total of eight
concrete beams, strengthened with NSM CFRP bars, were tested under
monotonic static loading. Different embedment lengths are studied
to determine the development length of the fiber-reinforced polymer
(FRP) reinforcement. The performance of two different adhesives used
to bond the bars to the surrounding concrete is examined. A general
methodology to evaluate the development length of NSM FRP bars of
different configurations and types of fibers is presented. A quantitative
criterion governing debonding failure is established. The proposed
bond model assumes linear elastic behavior for the concrete, adhesive,
and the NSM FRP bars, following the same philosophy of the ACI provisions
for bond analysis and design. The proposed analytical model is validated
by comparing the predicted values with test results as well as to
nonlinear finite element modelling. The influence of key parameters,
including the thickness of the adhesive cover, groove width, groove
spacing, and internal steel reinforcement configuration, are discussed.
%0 Journal Article
%1 Hassan2004
%A Hassan, Tarek K.
%A Rizkalla, Sami H.
%D 2004
%J ACI Structural Journal
%K beams; fiber reinforcement; strength, concrete FRP bond
%N 6
%P 830--839
%T Bond Mechanism of Near-Surface-Mounted Fiber-Reinforced Polymer Bars
for Flexural Strengthening of Concrete Structures
%V 101
%X This paper presents both experimental and analytical investigations
undertaken to evaluate bond characteristics of near-surface-mounted
(NSM) carbon fiber-reinforced polymer (CFRP) bars. A total of eight
concrete beams, strengthened with NSM CFRP bars, were tested under
monotonic static loading. Different embedment lengths are studied
to determine the development length of the fiber-reinforced polymer
(FRP) reinforcement. The performance of two different adhesives used
to bond the bars to the surrounding concrete is examined. A general
methodology to evaluate the development length of NSM FRP bars of
different configurations and types of fibers is presented. A quantitative
criterion governing debonding failure is established. The proposed
bond model assumes linear elastic behavior for the concrete, adhesive,
and the NSM FRP bars, following the same philosophy of the ACI provisions
for bond analysis and design. The proposed analytical model is validated
by comparing the predicted values with test results as well as to
nonlinear finite element modelling. The influence of key parameters,
including the thickness of the adhesive cover, groove width, groove
spacing, and internal steel reinforcement configuration, are discussed.
@article{Hassan2004,
abstract = {This paper presents both experimental and analytical investigations
undertaken to evaluate bond characteristics of near-surface-mounted
(NSM) carbon fiber-reinforced polymer (CFRP) bars. A total of eight
concrete beams, strengthened with NSM CFRP bars, were tested under
monotonic static loading. Different embedment lengths are studied
to determine the development length of the fiber-reinforced polymer
(FRP) reinforcement. The performance of two different adhesives used
to bond the bars to the surrounding concrete is examined. A general
methodology to evaluate the development length of NSM FRP bars of
different configurations and types of fibers is presented. A quantitative
criterion governing debonding failure is established. The proposed
bond model assumes linear elastic behavior for the concrete, adhesive,
and the NSM FRP bars, following the same philosophy of the ACI provisions
for bond analysis and design. The proposed analytical model is validated
by comparing the predicted values with test results as well as to
nonlinear finite element modelling. The influence of key parameters,
including the thickness of the adhesive cover, groove width, groove
spacing, and internal steel reinforcement configuration, are discussed.},
added-at = {2015-04-15T13:01:01.000+0200},
author = {Hassan, Tarek K. and Rizkalla, Sami H.},
biburl = {https://www.bibsonomy.org/bibtex/20bdedb843562bd8376f1d3baae046aba/v.vitanov},
file = {Hassan2004.pdf:Hassan2004.pdf:PDF},
interhash = {2ddfbda5ad03976c41f23e52f2772b8c},
intrahash = {0bdedb843562bd8376f1d3baae046aba},
journal = {ACI Structural Journal},
keywords = {beams; fiber reinforcement; strength, concrete FRP bond},
month = {November 1},
number = 6,
owner = {Vladimir.Vitanov},
pages = {830--839},
timestamp = {2015-04-16T09:20:21.000+0200},
title = {Bond Mechanism of Near-Surface-Mounted Fiber-Reinforced Polymer Bars
for Flexural Strengthening of Concrete Structures},
volume = 101,
year = 2004
}