scholarly journals FE Models of GFRP and CFRP Strengthening of Reinforced Concrete Beams

2009 ◽  
Vol 2009 ◽  
pp. 1-13 ◽  
Author(s):  
Kasidit Chansawat ◽  
Tanarat Potisuk ◽  
Thomas H. Miller ◽  
Solomon C. Yim ◽  
Damian I. Kachlakev
Keyword(s):  
Reinforced Concrete ◽  
Failure Modes ◽  
Concrete Beams ◽  
Three Dimensional ◽  
Full Scale ◽  
Reinforced Concrete Beams ◽  
Flexural Strengthening ◽  
Frp Composites ◽  
Strengthened Beam ◽  
Three Dimensional Finite Element

Three-dimensional finite element (FE) models are developed to simulate the behavior of full-scale reinforced concrete beams strengthened with glass and carbon fiber-reinforced polymer sheets (an unstrengthened control beam, a flexural-strengthened beam, a shear-strengthened beam, and a beam with both shear and flexural strengthening). FE models use eight-node isoparametric elements with a smeared cracking approach for the concrete and three-dimensional layered elements to model the FRP composites. Analysis results are compared with data obtained from full-scale beam tests through the linear and nonlinear ranges up to failure. It was found that the FE models could identify qualitatively trends observed in the structural behavior of the full-scale beams. Predicted crack initiation patterns resemble the failure modes observed for the full-scale beam tests.

Flexural Behaviors of RC Beams Strengthened with Post-Poured UHTCC Layer

2010 ◽  
Vol 150-151 ◽  
pp. 6-9
Author(s):  
Shi Lang Xu ◽  
Nan Wang
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Load Capacity ◽  
Three Dimensional ◽  
Close Correlation ◽  
Composite Beams ◽  
Reinforced Concrete Beams ◽  
Rc Beams ◽  
Strength Failure ◽  
Three Dimensional Finite Element

For studying the effectiveness of externally pouring Ultra High Toughness Cementitious Composites (UHTCC) in improving the flexural behaviors of existing reinforced concrete beams, four-point bending tests were conducted up to failure on seven RC beams and strengthening beams. The flexural strength, failure mode and crack propagation of composite beams were investigated. The results showed that pouring UHTCC on the bending surface of reinforced concrete beams properly to improve the ductility and load capacity of composite beams. It was also found that UHTCC layer restricted the development of cracks in upper concrete and dispersed them into multiple fine cracks effectively. Compared with post-poured concrete, UHTCC was more suitable for working together with reinforcement. The load-deflection plots obtained from three-dimensional finite-element models (FEMs) analyses were compared with those obtained from the experimental results, which showed close correlation.

Numerical Simulation about Reinforced Concrete Beams Strengthened by Bolting Steel Plates

2012 ◽  
Vol 166-169 ◽  
pp. 1807-1810
Author(s):  
Xue Song Gao ◽  
Dong Hui Huo ◽  
Shao Hua Lv ◽  
Xu Zhao
Keyword(s):  
Reinforced Concrete ◽  
Steel Plate ◽  
Concrete Beams ◽  
Three Dimensional ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Beams ◽  
Steel Plates ◽  
Anchor Bolt ◽  
Beam Surface ◽  
Strengthened Beam

This paper presents a three-dimensional nonlinear finite elemental analysis about the reinforcement concrete beams strengthened by bolting steel plate. The contact effects between the steel plate with reinforced concrete beam surface was simulated by developing the contact elements. The effect of strengthening is analyzed and the effects of the deformation and stress distribution of anchor bolt on the failure mode were investigated. It is declared that this strengthening method can obviously improve the capacity and stiffness of beam, and the flexural deformation of anchor bolt is key problem inducing the failure of strengthened beam. This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text.

Numerical Analysis about Flexural Strengthening Reinforced Concrete Beams by Bolting Steel Plates

2011 ◽  
Vol 217-218 ◽  
pp. 1658-1662
Author(s):  
Xiao Dan Liu ◽  
Sheng Wang Hao ◽  
Yan Yan Li
Keyword(s):  
Reinforced Concrete ◽  
Steel Plate ◽  
Concrete Beams ◽  
Plate Thickness ◽  
Three Dimensional ◽  
Reinforced Concrete Beam ◽  
Reinforced Concrete Beams ◽  
Flexural Strengthening ◽  
Beam Surface ◽  
Anchor Bolts

This paper presents a three-dimensional nonlinear finite elemental analysis about the reinforcement concrete beams strengthened by bolting steel plate, which is a new strengthening method by anchoring plate to beam surface but not using any glue to help bonding. The contact effects between the steel plate with reinforced concrete beam surface was simulated by developing the contact elements. The effects of the plate thickness and the collocation of anchor bolts were investigated. The damage evolution about variable collocation of anchor bolts were investigated. It is declared that the collocation of anchor bolts play an obvious effects on the flexural capacity of strengthened beams, but the plate thickness give a little influence on it.

Analysis on Fatigue Failure Modes of Reinforced Concrete Beams Strengthened with BFRP

2015 ◽  
Vol 744-746 ◽  
pp. 1367-1370
Author(s):  
Xu Jun Chen ◽  
Mu Xiang Dai ◽  
Zhong Yang
Keyword(s):  
Reinforced Concrete ◽  
Fatigue Fracture ◽  
Fatigue Failure ◽  
Failure Modes ◽  
Concrete Beams ◽  
Basalt Fiber ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Strengthened Beam

The fatigue failure modes of reinforced concrete beams externally strengthened with basalt fiber reinforced polymer(BFRP) sheets was examined in an experimental and analytical study. One strengthened beam failed due to the debonding and fracture of U-wraps FRP sheet at the anchors,and the others failed the fatigue fracture of the longitudinal tensile reinforcements. Based onCode for Design of strengthening concrete structure, the fatigue failure of RC bending members strengthened with FRP was analysed,and the indicate that with reinforcement ratio of 0.612% and fatigue stress ratio of 0.3, only the fatigue fracture of steel bars occured rather than the crushing of concrete in the compression zone.

scholarly journals Pretreatment of Woven Jute FRP Composite and Its Use in Strengthening of Reinforced Concrete Beams in Flexure

2013 ◽  
Vol 2013 ◽  
pp. 1-15 ◽  
Author(s):  
Tara Sen ◽  
H. N. Jagannatha Reddy
Keyword(s):  
Heat Treatment ◽  
Reinforced Concrete ◽  
Failure Modes ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Suitable Material ◽  
Flexural Strengthening ◽  
Frp Composite ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer

Environmental awareness motivates researchers worldwide to perform studies of natural fibre reinforced polymer composites, as they come with many advantages and are primarily sustainable. The present study aims at evaluating the mechanical characteristics of natural woven jute fibre reinforced polymer (FRP) composite subjected to three different pretreatments, alkali, benzyl chloride, and lastly heat treatment. It was concluded that heat treatment is one of the most suitable treatment methods for enhancing mechanical properties of jute FRP. Durability studies on Jute FRP pertaining to some common environmental conditions were also carried out such as effect of normal water and thermal aging on the tensile strength of jute FRP followed by fire flow test. The heat treated woven jute FRP composites were subsequently used for flexural strengthening of reinforced concrete beams in full and strip wrapping configurations. The study includes the effect of flexural strengthening provided by woven jute FRP, study of different failure modes, load deflection behavior, effect on the first crack load, and ultimate flexural strength of concrete beams strengthened using woven jute FRP subjected to bending loads. The study concludes that woven jute FRP is a suitable material which can be used for flexural upgradation of reinforced concrete beams.

Sign in / Sign up

Export Citation Format

Share Document