Finite Element Modeling Of Reinforced Concrete Structures Strengthened With Frp Laminates
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Finite Element Modeling Of Reinforced Concrete Structures Strengthened With Frp Laminates
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Author : Damian I. Kachlakev
language : en
Publisher:
Release Date : 2001
Finite Element Modeling Of Reinforced Concrete Structures Strengthened With Frp Laminates written by Damian I. Kachlakev and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Concrete beams categories.
Finite Element Modeling Of Concrete Structures Strengthened With Frp Laminates
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Author : Damian I. Kachlakev
language : en
Publisher:
Release Date : 2001
Finite Element Modeling Of Concrete Structures Strengthened With Frp Laminates written by Damian I. Kachlakev and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Concrete beams categories.
Nonlinear Finite Element Analysis Of Reinforced Concrete Structures Strengthened With Frp Laminates
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Author : Kasidit Chansawat
language : en
Publisher:
Release Date : 2003
Nonlinear Finite Element Analysis Of Reinforced Concrete Structures Strengthened With Frp Laminates written by Kasidit Chansawat and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Concrete bridges categories.
The Horsetail Creek (HC) bridge is an example of an Oregon bridge that was classified as structurally deficient and was not designed to withstand earthquake (EQ) excitations. A fiber-reinforced polymer (FRP) rehabilitation was performed on the HC bridge to increase flexural and shear capacities for traffic loads. However, a seismic retrofit has not yet been accomplished for this bridge. Fully three-dimensional finite element (FE) models are developed to simulate and examine the structural behavior of both full-size reinforced concrete (RC) beams and the HC bridge using ANSYS. FE analyses are compared with tests of full-scale beams replicating the transverse beams of the HC bridge before and after FRP strengthening from linear and nonlinear ranges up to failure. The FE models can effectively predict the behavior of the beams, and analytical and experimental results correlate very well. For the FE analyses of the HC bridge, soil-structure interface modeling is incorporated to replicate the actual bridge boundary conditions. Truck loadings are applied to the FE model at different locations, as in the actual bridge test. A sensitivity study is performed by varying uncertain bridge parameters to develop an FE bridge model best representing the actual bridge conditions. The optimal FE model obtained from the sensitivity study can accurately predict the magnitudes and trends in the strains. After an optimal FE bridge model is established, a performance evaluation on the FRP strengthening of the HC bridge is conducted. Both unstrengthened and FRP-strengthened bridge models are subjected to two different types of loading; i.e., scaled gravity and scaled truck loads to failure. Comparisons of results show the improvement in structural performance due to FRP strengthening. A seismic risk-related investigation of the HC bridge is also carried out. Nonlinear time-history analyses are performed using EQ acceleration-time histories applied to the HC bridge model. The ground motions are appropriate to the Pacific Northwest site and scaled so that the response spectrum, within natural periods of interest, matches the 1996 AASHTO design response spectrum. Based on the analytical results, colunm confinement is recommended to increase ductility and reduce potential for substructure collapse in future seismic events.
Practitioners Guide To Finite Element Modelling Of Reinforced Concrete Structures
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Author : fib Fédération internationale du béton
language : en
Publisher: fib Fédération internationale du béton
Release Date : 2008-01-01
Practitioners Guide To Finite Element Modelling Of Reinforced Concrete Structures written by fib Fédération internationale du béton and has been published by fib Fédération internationale du béton this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-01-01 with Technology & Engineering categories.
Non-linear computer analysis methods have seen remarkable advancement in the last half-century. The state-of-the-art in non-linear finite element analysis of reinforced concrete has progressed to the point where such procedures are close to being practical, every-day tools for design office engineers. Non-linear computer analysis procedures can be used to provide reliable assessments of the strength and integrity of damaged or deteriorated structures, or of structures built to previous codes, standards or practices deemed to be deficient today. They can serve as valuable tools in assessing the expected behaviour from retrofitted structures, or in investigating and rationally selecting amongst various repair alternatives. fib Bulletin 45 provides an overview of current concepts and techniques relating to computer-based finite element modelling of structural concrete. It summarises the basic knowledge required for use of nonlinear analysis methods as applied to practical design, construction and maintenance of concrete structures, and attempts to provide a diverse and balanced portrayal of the current technical knowledge, recognizing that there are often competing and conflicting viewpoints. This report does not give advice on picking one model over another but, rather, provides guidance to designers on how to use existing and future models as tools in design practice, in benchmarking of their models against established and reliable test data and in selecting an appropriate safety factor as well as recognising various pitfalls. fib Bulletin 45 is intended for practicing engineers, and therefore focuses more on practical application and less on the subtleties of constitutive modelling.
Nonlinear Finite Element Analysis Of Composite And Reinforced Concrete Beams
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Author : Xiaoshan Lin
language : en
Publisher: Woodhead Publishing
Release Date : 2019-10-18
Nonlinear Finite Element Analysis Of Composite And Reinforced Concrete Beams written by Xiaoshan Lin and has been published by Woodhead Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-10-18 with Architecture categories.
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 Modeling Of Reinforced Concrete Beams Externally Strengthened By Frp Composites
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Author : Tanarat Potisuk
language : en
Publisher:
Release Date : 2000
Finite Element Modeling Of Reinforced Concrete Beams Externally Strengthened By Frp Composites written by Tanarat Potisuk and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Concrete beams categories.
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.
Finite Element Simulation Of Reinforced Concrete Deep Beam With Opening Strengthened With Frp Laminates
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Author : Osama AbdulRazak AbdulWahab
language : en
Publisher:
Release Date : 2013
Finite Element Simulation Of Reinforced Concrete Deep Beam With Opening Strengthened With Frp Laminates written by Osama AbdulRazak AbdulWahab and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Finite element method categories.
Additional Finite Element Method For Analysis Of Reinforced Concrete Structures At Limit States
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Author : Ermakova A.V.
language : en
Publisher: Издательство АСВ
Release Date : 2012
Additional Finite Element Method For Analysis Of Reinforced Concrete Structures At Limit States written by Ermakova A.V. and has been published by Издательство АСВ this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Technology & Engineering categories.
The work presents the theoretical basis of Additional Finite Element Method (AFEM), which is a variant of the Finite Element Method (FEM) for analysis of reinforced concrete structures at limit state. AFEM adds to the traditional sequence of problem by FEM the units of the two well-known methods of the structural design: method of additional loads and limit state method. The problem is solved by introduction of ideal failure models and additional design diagrams formed from additional finite elements, where each AFE describes the limit state reached by the main element. The main relations defining the properties of AFEs as well as the examples of the use of Additional Finite Element Method for analysis of reinforced concrete structures at limit state are given in the work too.
Finite Element Design Of Concrete Structures
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Author : Guenter Axel Rombach
language : en
Publisher: Thomas Telford
Release Date : 2004
Finite Element Design Of Concrete Structures written by Guenter Axel Rombach and has been published by Thomas Telford this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Architecture categories.
In Finite Element Design of Concrete Structures: practical problems and their solutions the author addresses this blind belief in computer results by offering a useful critique that important details are overlooked due to the flood of information from the output of computer calculations. Indeed, errors in the numerical model may lead in extreme cases to structural failures as the collapse of the so-called Sleipner platform has demonstrated.
Finite Element Analysis Of Bond Characteristics At The Frp Concrete Interface
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Author : Mani Balazadeh Minouei
language : en
Publisher:
Release Date : 2014
Finite Element Analysis Of Bond Characteristics At The Frp Concrete Interface written by Mani Balazadeh Minouei and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
"Reinforced concrete structures are prone to corrosion in harsh environments. Fibre-Reinforced Polymer (FRP) laminates are more resistant than steel elements, such as bars and plate in aggressive environments; they can be used as a barrier to protect concrete structures; however, poor bond between FRP composite laminates and structural concrete can prevent utilizing the full structural and protective capacity of FRP-concrete composite system, therefore, it is important to develop good bond between concrete and the FRP to ensure the integrity and durability of the FRP-concrete system. There is a need to understand the bond characteristics at the FRP laminates-concrete interface, and the various parameters influencing the bond performance of the composite system. This research program consists of numerical modeling of the double lap pull-off tests conducted by Ali et.al (2012) and comparing the computed values with the experimental results for two different batches, along with an evaluation of the various parameters influencing bond between FRP laminates and concrete. The ABAQUS 6.10.1 program was used to model the double lap pull-off test. Shell elements were used to model FRP laminates, solid elements for concrete and steel and cohesive elements for modeling the epoxy joint. The constitutive models for the materials were selected based on their experimental behavior. A linear elastic model was used for modeling FRP laminates and steel, elastoplastic behavior was used for modeling epoxy and damaged plasticity model was used for modeling concrete.Numerical and experimental curves reflected similar responses. In the first batch the average ultimate load in the tests was 70.7 kN , while the ultimate load for the numerical analysis was 73.8 kN, showing a difference of 4.6% . Also, the average experimental value of strain at the center of the FRP laminate was 2657x[(10)]^(-6), while the ultimate strain in numerical simulation was 3023x[(10)]^(-6), showing an acceptable difference of 12.1 %. In the second batch, the average of experimental ultimate load was 54.5kN, while the ultimate load in numerical analysis was 58.6kN, with a difference of only 5.4%. The computed ultimate strain is 2320 x[(10)]^(-6), while the average of ultimate strain in experimental study was 2173x[(10)]^(-6), showing a discrepancy of 6.3%. Also, the effect of different geometrical factors on the bond behavior of FRP and concrete was studied; it was concluded that, the most effective geometrical parameter influencing bond between FRP and concrete was the bonded width of the FRP laminate." --