A Numerical Study of the Anchorages against Debonding of Carbon Fibre Reinforced Polymer from a Reinforced Concrete Beam

2013 ◽  
Author(s):  
L.H. Huang ◽  
L. Li ◽  
Y.F. Wang
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fibre ◽  
Concrete Beam ◽  
Numerical Study ◽  
Reinforced Concrete Beam ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

Experimental and numerical study on the effect of repairing reinforced concrete cracked beams strengthened with carbon fibre reinforced polymer laminates

2014 ◽  
Vol 41 (3) ◽  
pp. 222-231 ◽  
Author(s):  
P. Duarte ◽  
J.R. Correia ◽  
J.G. Ferreira ◽  
F. Nunes ◽  
M.R.T. Arruda
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fibre ◽  
Fracture Energy ◽  
Numerical Study ◽  
Structural Response ◽  
Rc Beams ◽  
Cfrp Laminates ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer

This paper presents experimental and numerical investigations on the effect of repairing cracks in reinforced concrete (RC) beams prior to strengthening them with carbon fibre reinforced polymer (CFRP) laminates. The experimental campaign comprised flexural tests on three types of full-scale RC beams with T-shaped cross-section: (i) two reference un-strengthened beams, (ii) two CFRP-strengthened beams previously loaded and cracked, and (iii) two CFRP-strengthened beams, previously loaded, cracked and repaired with epoxy resin. The repair and strengthening techniques consisted of respectively injecting the cracks with epoxy resin and applying CFRP laminates according to the externally bonding reinforcement technique. In the numerical study, the structural response of all beams tested was simulated using the finite element software Atena, which features a smeared cracked model constitutive relationship for concrete. A parametric study was carried out in which the influence of material parameters, namely the fracture energy, on the beams structural response was assessed. Experimental results showed that repairing cracks by means of epoxy injection before strengthening them with CFRP laminates provided a considerable increase of stiffness, but only a slight increase of ultimate strength, as failure was triggered by the debonding of the strengthening system at the anchorage zones. In the numerical study a very good agreement with experimental data was obtained. For the repaired and strengthened beams, such agreement was obtained by increasing concrete’s fracture energy when compared to that of the reference beams.

Hybrid simulation of a carbon fibre–reinforced polymer-strengthened continuous reinforced concrete girder bridge

2017 ◽  
Vol 20 (11) ◽  
pp. 1658-1670 ◽  
Author(s):  
Shizhu Tian ◽  
Hongxing Jia ◽  
Yuanzheng Lin
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fibre ◽  
Hybrid Simulation ◽  
Simulation System ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Girder Bridge ◽  
Concrete Girder ◽  
Hybrid Simulations

The behaviour of bridge columns strengthened using carbon fibre–reinforced polymer composites has been studied extensively. However, few investigations have been conducted regarding the influence of carbon fibre–reinforced polymer-strengthened columns on the seismic behaviour of reinforced concrete continuous girder bridges. This article details the hybrid simulations of a continuous reinforced concrete girder bridge whose columns are strengthened by carbon fibre–reinforced polymer jackets. In the hybrid simulations, one ductile column is selected as the experimental element, which is represented by a 1/2.5-scale specimen, and the remaining bridge parts are simultaneously modelled in OpenSees (the Open System for Earthquake Engineering Simulation). After combining the experimental element and the numerical substructure, the hybrid analysis model is developed with the established hybrid simulation system. The displacements of the bridge and the lateral force–displacement response of the experimental element in hybrid simulation are obtained. Compared with the results of numerical simulation, the stability and accuracy of the established hybrid simulation system are demonstrated. Meanwhile, the comparative hybrid simulation results of the as-built bridge and the carbon fibre–reinforced polymer-strengthened bridge also prove the effectiveness of the carbon fibre–reinforced polymer jackets’ confinement in the continuous reinforced concrete girder bridge.

Strengthening with Prestressed CFRP Strips of Box Girders on the Chofu Bridge, Japan

2010 ◽  
pp. 21-34
Author(s):  
Masami Fujita ◽  
Terumitsu Takahashi ◽  
Kazuhiro Kuzume ◽  
Tamon Ueda ◽  
Akira Kobayashi
Keyword(s):  
Reinforced Concrete ◽  
Carbon Fibre ◽  
Box Girders ◽  
Strip Method ◽  
Reinforced Polymer ◽  
Before And After ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Load Tests ◽  
Cfrp Strip

<p>Reinforced concrete (RC) box girders of the Chofu Bridge had been strengthened using tensioned carbon fibre reinforced polymer (CFRP) strip method. Before and after the CFRP application, on-site load tests of the bridge were conducted using a 45 t weight vehicle.</p>

Sign in / Sign up

Export Citation Format

Share Document