Author: Kuldeep CharanPublisher:
ISBN:
Category :
Languages : en
Pages : 304
Book Description
Finite Element Analysis of Concrete Beams Prestressed with Unbonded Fiber Reinforced Polymer (FRP)
Finite Element Analysis of an Intentionally Damaged Prestressed Reinforced Concrete Beam Repaired with Carbon Fiber Reinforced Polymers
Author: David A. BrightonPublisher:
ISBN:
Category : Concrete beams
Languages : en
Pages : 84
Book Description
Many of the existing bridges are in need of repair and strengthening due to various reasons including design flaws, fatigue and deterioration of steel reinforcement, increase in traffic volume, and accidental impact loads during collisions between vehicles and bridge girders or piers. The use of fiber reinforced polymer (FRP) materials to repair and strengthen the deficient infrastructures has become very popular due to FRP's well known advantages such as high strength-to-weight ratio, corrosion resistance, light weight, and ease of applications. This paper presents a review of existing experimental investigations and field applications of FRP-strengthened reinforced concrete structures. Various FRP retrofit techniques are also discussed. A Finite Element Model (FEM) of a prestressed reinforced concrete beam is modeled based off an experimentally tested beam. The model is intentionally damaged by cutting two prestressing strands and one mild steel bar. The beam is repaired with three layers of Carbon Fiber Reinforced Polymer (CFRP) to recover the original design strength of the beam.
Nonlinear Finite Element Analysis of Composite and Reinforced Concrete Beams
Author: Xiaoshan LinPublisher: Woodhead Publishing
ISBN: 0128169001
Category : Architecture
Languages : en
Pages : 256
Book Description
Nonlinear Finite Element Analysis of Composite and Reinforced Concrete Beams presents advanced methods and techniques for the analysis of composite and FRP reinforced concrete beams. The title introduces detailed numerical modeling methods and the modeling of the structural behavior of composite beams, including critical interfacial bond-slip behavior. It covers a new family of composite beam elements developed by the authors. Other sections cover nonlinear finite element analysis procedures and the numerical modeling techniques used in commercial finite element software that will be of particular interest to engineers and researchers executing numerical simulations. Gives advanced methods and techniques for the analysis of composite and fiber Reinforced Plastic (FRP) and reinforced concrete beams Presents new composite beam elements developed by the authors Introduces numerical techniques for the development of effective finite element models using commercial software Discusses the critical issues encountered in structural analysis Maintains a clear focus on advanced numerical modeling
Finite Element Analysis of Prestressed Concrete Structures Using Post-Tensioning Steel
Author: Yu HuangPublisher: Cambridge Scholars Publishing
ISBN: 152755354X
Category : Technology & Engineering
Languages : en
Pages : 305
Book Description
This book details the theory and applications of finite element (FE) modeling of post-tensioned (PT) concrete structures, and provides the updated MATLAB code (as of 2019). The challenge of modeling PT prestressed concrete structures lies in the treatment of the interface between the concrete and prestressing tendons. Using MATLAB, this study develops an innovative nonlinear FE formulation which incorporates contact techniques and engineering elements to considerably reduce the need of computational power. This FE formulation has the ability to simulate different PT frame systems with fully bonded, fully unbonded or partially bonded tendons, as well as actual sliding behavior and frictional effects in the tendons. It also allows for the accurate simulation of anchor seating loss.
Finite Element Analysis of Fiber Reinforced Polymer Composite Reinforced Concrete Beams
Author: Muhanad M. M.Finite Element Modeling of Reinforced Concrete Beams Externally Strengthened by FRP Composites
Author: Tanarat PotisukPublisher:
ISBN:
Category : Concrete beams
Languages : en
Pages : 180
Book Description
Three-dimensional finite element models are developed to simulate the behavior of four fill-scale reinforced concrete beams. The beams are constructed with different fiber-reinforced polymer (FRP) strengthening schemes, and are modeled using ANSYS, a commercially available finite element analysis program. The experimental beams replicate the transverse beams of the Horsetail Creek Bridge, and were constructed and tested at Oregon State University. The finite element models use a smeared cracking approach for the concrete and three-dimensional layered elements to model the FRP composites. It was found that the finite element models could effectively simulate the behavior of the full-scale beams. Results obtained from the finite element analysis are presented and compared with the experimental data from the full-scale beam tests through the linear and nonlinear ranges up to failure. Comparisons are made for load-strain plots, load-deflection plots, first cracking loads, loads at failure, and crack patterns at failure. The results from the finite element analysis show good agreement with those from the experimental data and support hand calculation predictions for the experiment very well. The crack patterns at failure predicted by the finite element program strongly corroborate the failure modes observed for the full-scale beam tests. Recommendations for finite element modeling improvement are included.
Nonlinear Finite Element Modeling of RC Beams Strengthened with Prestressed NSM FRP Laminates
Author: Yubraj PandeyPublisher:
ISBN:
Category : Concrete beams
Languages : en
Pages : 93
Book Description
This thesis presents the parametric study of nonlinear Finite Element Analysis (FEA) modeling of Reinforced Concrete (RC) beams prestressed with Near-Surface Mounted (NSM) FRP. FEA model was validated with the experimental beam results available in the literature to determine the accuracy. Parameters considered were steel and laminates reinforcement ratios, various steel and FRP materials properties (Normal Modulus (NM), High Modulus (HM) and Ultra-High Modulus (UHM)), and FRP types (Basalt Fiber Reinforced Polymer (BFRP), Glass Fiber Reinforced Polymer (GFRP) and Carbon Fiber Reinforced Polymer (CFRP)) under various prestressing conditions. The RC beams were strengthened with FRP laminates which were prestressed by 20, 30, 40% and were compared to the control beam (0% prestressing).The temperature equivalent to the prestressing force was applied to the FRP laminates. Based upon these prestressing levels, the load at yield initiation, ultimate load at failure and ductility index of the beam were determined. From finite element analysis of RC beam results, the application of the prestressing had significantly increased the load at the yield point. However, the percentage increase of ultimate load was low as compared to non prestressed beam. The load versus displacement curves of beams demonstrated a reduction in ductility as the prestressing level was increased. The optimum prestressing level found to be 30% for all parameters while the FRP reinforcement ratio had the maximum effect in load carrying capacity.
Nonlinear Finite-element Analysis of Reinforced-concrete Beams Retrofitted with Externally Bonded Fibre-reinforced Polymers
Author: Alrazi EarijFinite Element Analysis of Prestressed Concrete Structures Using Post-Tensioning Steel
Author: Yu HuangPublisher: Cambridge Scholars Publishing
ISBN: 9781527542853
Category : Finite element method
Languages : en
Pages : 301
Book Description
This book details the theory and applications of finite element (FE) modeling of post-tensioned (PT) concrete structures, and provides the updated MATLAB code (as of 2019). The challenge of modeling PT prestressed concrete structures lies in the treatment of the interface between the concrete and prestressing tendons. Using MATLAB, this study develops an innovative nonlinear FE formulation which incorporates contact techniques and engineering elements to considerably reduce the need of computational power. This FE formulation has the ability to simulate different PT frame systems with fully bonded, fully unbonded or partially bonded tendons, as well as actual sliding behavior and frictional effects in the tendons. It also allows for the accurate simulation of anchor seating loss.
Author: Trevor Neville Haas