Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43514
Title: Unified cyclic stress-strain model for normal and high strength concrete confined with FRP
Authors: Yu, T
Zhang, B
Teng, JG 
Keywords: Concrete
Confinement
Cyclic loading
Frp
High-strength concrete
Stress-strain model
Issue Date: 2015
Publisher: Pergamon Press
Source: Engineering structures, 2015, v. 102, p. 189-201 How to cite?
Journal: Engineering structures 
Abstract: Fiber reinforced polymer (FRP) has become increasingly popular as a confining material for concrete, both in the strengthening of existing columns where FRP wraps with fibers oriented completely or predominantly in the hoop direction are typically used, and in new construction where filament-wound FRP tubes with fibers oriented at desired angles to the longitudinal axis are typically used. For both types of applications, the stress-strain behavior of FRP-confined concrete under cyclic axial compression needs to be properly understood and modeled for the accurate simulation of such columns under seismic loading. This paper presents an improved cyclic stress-strain model for FRP-confined concrete on the basis of a critical assessment of an earlier model proposed by Lam and Teng in 2009 by making use of a database containing new test results of both concrete-filled FRP tubes (CFFTs) and concrete cylinders confined with an FRP wrap. The assessment reveals several deficiencies of Lam and Teng's model due to the limited test results available to them. The proposed model corrects these deficiencies and is shown to provide reasonably accurate predictions for both concrete in CFFTs and concrete confined with an FRP wrap and for both normal strength concrete (NSC) and high strength concrete (HSC).
URI: http://hdl.handle.net/10397/43514
ISSN: 0141-0296
EISSN: 1873-7323
DOI: 10.1016/j.engstruct.2015.08.014
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