June 20, 2021

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Strengthening of Reinforced Concrete Structures

Strengthening of Reinforced Concrete Structures
Author : L C Hollaway,M Leeming
Publisher : Elsevier
Release Date : 1999-03-05
Category : Technology & Engineering
Total pages :352
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The in situ rehabilitation or upgrading of reinforced concrete members using bonded steel plates is an effective, convenient and economic method of improving structural performance. However, disadvantages inherent in the use of steel have stimulated research into the possibility of using fibre reinforced polymer (FRP) materials in its place, providing a non-corrosive, more versatile strengthening system. This book presents a detailed study of the flexural strengthening of reinforced and prestressed concrete members using fibre reinforces polymer composite plates. It is based to a large extent on material developed or provided by the consortium which studied the technology of plate bonding to upgrade structural units using carbon fibre / polymer composite materials. The research and trial tests were undertaken as part of the ROBUST project, one of several ventures in the UK Government's DTI-LINK Structural Composites Programme. The book has been designed for practising structural and civil engineers seeking to understand the principles and design technology of plate bonding, and for final year undergraduate and postgraduate engineers studying the principles of highway and bridge engineering and structural engineering. Detailed study of the flexural strengthening of reinforced and prestressed concrete members using fibre reinforced polymer composites Contains in-depth case histories

Strengthening of Concrete Structures Using Fiber Reinforced Polymers (FRP)

Strengthening of Concrete Structures Using Fiber Reinforced Polymers (FRP)
Author : Hwai-Chung Wu,Christopher D Eamon
Publisher : Woodhead Publishing
Release Date : 2017-02-21
Category : Technology & Engineering
Total pages :340
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Strengthening of Concrete Structures Using Fiber Reinforced Polymers (FRP): Design, Construction and Practical Applications presents a best practice guide on the structural design and strengthening of bridge structures using advanced Fiber Reinforced Polymer (FRP) composites. The book briefly covers the basic concepts of FRP materials and composite mechanics, while focusing on practical design and construction issues, including inspection and quality control, paying special attention to the differences in various design codes (US, Japan, and Europe) and recommendations. At present, several design guides from the US, Japan, and Europe are available. These guidelines are often inconsistent and do not cover all necessary design and inspection issues to the same degree of detail. This book provides a critical review and comparison of these guidelines, and then puts forward best practice recommendations, filling a significant gap in the literature, and serving as an important resource for engineers, architects, academics, and students interested in FRP materials and their structural applications. Written from a practitioner's point-of-view, it is a valuable design book for structural engineers all over the world. Includes a large quantity of design examples and structural software to facilitate learning and help readers perform routine design Provides recommendations for best practices in design and construction for the strengthening of bridge structures using advanced fiber-reinforced polymer (FRP) composites Presents comprehensive guidelines on design, inspection, and quality control, including laboratory and field testing information

Rehabilitation of Concrete Structures with Fiber-Reinforced Polymer

Rehabilitation of Concrete Structures with Fiber-Reinforced Polymer
Author : Riadh Al-Mahaidi,Robin Kalfat
Publisher : Butterworth-Heinemann
Release Date : 2018-11-12
Category : Technology & Engineering
Total pages :413
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Rehabilitation of Concrete Structures with Fiber Reinforced Polymer is a complete guide to the use of FRP in flexural, shear and axial strengthening of concrete structures. Through worked design examples, the authors guide readers through the details of usage, including anchorage systems, different materials and methods of repairing concrete structures using these techniques. Topics include the usage of FRP in concrete structure repair, concrete structural deterioration and rehabilitation, methods of structural rehabilitation and strengthening, a review of the design basis for FRP systems, including strengthening limits, fire endurance, and environmental considerations. In addition, readers will find sections on the strengthening of members under flexural stress, including failure modes, design procedures, examples and anchorage detailing, and sections on shear and torsion stress, axial strengthening, the installation of FRP systems, and strengthening against extreme loads, such as earthquakes and fire, amongst other important topics. Presents worked design examples covering flexural, shear, and axial strengthening Includes complete coverage of FRP in Concrete Repair Explores the most recent guidelines (ACI440.2, 2017; AS5100.8, 2017 and Concrete society technical report no. 55, 2012)

Strengthening Reinforced Concrete Structures with Externally Bonded Fibre Reinforced Polymers

Strengthening Reinforced Concrete Structures with Externally Bonded Fibre Reinforced Polymers
Author : Kenneth W. Neale,ISIS Canada
Publisher : Unknown
Release Date : 2001
Category : Fiber-reinforced concrete
Total pages :215
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Strengthening of Concrete Structures Using Fiber Reinforced Polymers (FRP)

Strengthening of Concrete Structures Using Fiber Reinforced Polymers (FRP)
Author : Hwai Chung Wu,Christopher D. Eamon
Publisher : Woodhead Publishing Limited
Release Date : 2017-03-01
Category : Technology & Engineering
Total pages :350
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Strengthening of Concrete Structures Using Fiber Reinforced Polymers (FRP): Design, Construction and Practical Applications presents a best practice guide on the structural design and strengthening of bridge structures using advanced Fiber Reinforced Polymer (FRP) composites. The book briefly covers the basic concepts of FRP materials and composite mechanics, while focusing on practical design and construction issues, including inspection and quality control, paying special attention to the differences in various design codes (US, Japan, and Europe) and recommendations. At present, several design guides from the US, Japan, and Europe are available. These guidelines are often inconsistent and do not cover all necessary design and inspection issues to the same degree of detail. This book provides a critical review and comparison of these guidelines, and then puts forward best practice recommendations, filling a significant gap in the literature, and serving as an important resource for engineers, architects, academics, and students interested in FRP materials and their structural applications. Written from a practitioner's point-of-view, it is a valuable design book for structural engineers all over the world. Includes a large quantity of design examples and structural software to facilitate learning and help readers perform routine design Provides recommendations for best practices in design and construction for the strengthening of bridge structures using advanced fiber-reinforced polymer (FRP) composites Presents comprehensive guidelines on design, inspection, and quality control, including laboratory and field testing information

Fibre-Reinforced Polymer Reinforcement for Concrete Structures

Fibre-Reinforced Polymer Reinforcement for Concrete Structures
Author : Kiang Hwee Tan
Publisher : World Scientific
Release Date : 2003
Category : Technology & Engineering
Total pages :1528
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Fibre-reinforced polymer (FRP) reinforcement has been used in construction as either internal or external reinforcement for concrete structures in the past decade. This book provides the latest research findings related to the development, design and application of FRP reinforcement in new construction and rehabilitation works. The topics include FRP properties and bond behaviour, externally bonded reinforcement for flexure, shear and confinement, FRP structural shapes, durability, member behaviour under sustained loads, fatigue loads and blast loads, prestressed FRP tendons, structural strengthening applications, case studies, and codes and standards.

ANALYSIS AND DESIGN OF FRP REINFORCED

ANALYSIS AND DESIGN OF FRP REINFORCED
Author : Shamsher Bahadur Singh
Publisher : McGraw-Hill Education
Release Date : 2021
Category :
Total pages :129
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?With the advent of advanced composite materials in the form of fiber reinforced polymer (FRP), these innovative FRP materials have been utilized across the world as internal reinforcements, external reinforcements, and prestressing tendons/strands. The research carried out on FRP materials have revealed their potential as efficient construction materials requiring least maintenance and minimal life cycle cost. In addition, FRP also finds usage as external strengthening material in deficient structures and for upgrading the strength of structures to meet new requirements. This book presents various aspects of FRP composite materials, their characteristics, manufacturing techniques, real-life projects, different forms of FRP products and, most importantly, detailed procedures for designing new structures using FRP as internal reinforcements, external strengthening materials, and prestressing materials. The main topics covered: introduction of FRP composites? material characteristics? history and uses of FRP technology? design of RC structures using FRP bars? design philosophy for FRP external strengthening systems? durability-based design approach for external FRP strengthening of RC beams Alongside case study problems, for example, on FRP prestressed concrete bridges, this book comes equipped with ample exercise problems and design examples. As a consolidated source of design guidelines and design examples on FRP reinforced and/or prestressed concrete structures, this book will be of prime interest to a wide range of readers including researchers, academicians in general, consultants, practitioners, designers, writers of design codes, structural engineers, and senior undergraduate and graduate students.

Developments in fiber-reinforced polymer (FRP) composites for civil engineering

Developments in fiber-reinforced polymer (FRP) composites for civil engineering
Author : J. Wang
Publisher : Elsevier Inc. Chapters
Release Date : 2013-05-15
Category : Technology & Engineering
Total pages :558
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Strengthening reinforced concrete (RC) members using fiber reinforced polymer (FRP) composites through external bonding has emerged as a viable technique to retrofit/repair deteriorated infrastructure. The interface between the FRP and concrete plays a critical role in this technique. This chapter discusses the analytical and experimental methods used to examine the integrity and long-term durability of this interface. Interface stress models, including the commonly adopted two-parameter elastic foundation model and a novel three-parameter elastic foundation model (3PEF) are first presented, which can be used as general tools to analyze and evaluate the design of the FRP strengthening system. Then two interface fracture models – linear elastic fracture mechanics and cohesive zone model – are established to analyze the potential and full debonding process of the FRP–concrete interface. Under the synergistic effects of the service loads and environments species, the FRP–concrete interface experiences deterioration, which may reduce its long-term durability. A novel experimental method, environment-assisted subcritical debonding testing, is then introduced to evaluate this deteriorating process. The existing small cracks along the FRP–concrete interface can grow slowly even if the mechanical load is lower than the critical value. This slow-crack growth process is known as environment-assisted subcritical cracking. A series of subcritical cracking tests are conducted using a wedge-driven test setup t o gain the ability to accurately predict the long-term durability of the FRP–concrete interface.

Strengthening of Concrete Structures Using Carbon Fibre Reinforced Polymers and Cement-based Adhesives

Strengthening of Concrete Structures Using Carbon Fibre Reinforced Polymers and Cement-based Adhesives
Author : Siavash Hashemi
Publisher : Unknown
Release Date : 2011
Category :
Total pages :418
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The research project conducted in this study concerns the investigation of the application of cement-based adhesives in CFRP strengthening of reinforced concrete members. The results demonstrate that mineral-based adhesives can provide the desired matrices for CFRP reinforcement. The literature review covers the background of CFRP application with conventional techniques. The bond characteristics of CFRP to concrete substrate, the flexural performance of retrofitted RC beams, and the failure modes at normal temperature are discussed. The guidelines for and numerical approaches to CFRP application are reviewed. Current studies of CFRP application at high temperature and related studies on the application of cement-based adhesive as bonding agent are investigated. The experimental work on the bond characteristics of CFRP material to concrete substrate using cement-based adhesive includes tests on single-lap shear. Results show that the cementitious adhesive can provide a reliable matrix for CFRP textiles to achieve certain bond stresses comparable to what can be achieved using conventional inorganic adhesives. The failure mode is debonding through the CFRP-mortar interface. The bond-slip relationship was extracted and later applied in finite element analysis.The experimental work on retrofitting of RC beams using cementitious adhesive showed that CFRP textile is the most compatible option with this new type of adhesive. The CFRP textile can improve the flexural ultimate strength of RC beams by 35%. The failure mode was intermediate debonding, similar to that achieved by using epoxy as reported in the research literature. A new type of anchorage was utilised for CFRP application using cementitious adhesive, which improved the ultimate capacity by 42%. The failure mode was concrete crushing on top, inferring that the full possible capacity of the beam was utilised.The experimental work pursued an investigation of flexural performance of retrofitted beams at high temperature. The results show that the retrofitted RC beam with cement-based adhesive had a considerable high temperature endurance compared to the specimens with epoxy. The failure temperature was 844°C. The proposed strengthening technique is therefore a reliable method for structures at high risk of fire exposure. The failure mode is intermediate debonding within a high moment region.Finite element analysis (FEA) was conducted to simulate and gain a better understating of the performance of retrofitted members. There was a good correlation between the empirical results and the FE analysis. Furthermore, FEA was used to simulate the performance of a retrofitted RC beam under fire, and to predict the fire endurance and failure mode of the beam.

Externally Bonded FRP Reinforcement for RC Structures

Externally Bonded FRP Reinforcement for RC Structures
Author : fib Fédération internationale du béton
Publisher : fib Fédération internationale du béton
Release Date : 2001-01-01
Category : Technology & Engineering
Total pages :138
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In December 1996, the then CEB established a Task Group with the main objective to elaborate design guidelines for the use of FRP reinforcement in accordance with the design format of the CEB-FIP Model Code and Eurocode2. With the merger of CEB and FIP into fib in 1998, this Task Group became fib TG 9.3 FRP Reinforcement for concrete structures in Commission 9 Reinforcing and Prestressing Materials and Systems. The Task Group consists of about 60 members, representing most European universities, research institutes and industrial companies working in the field of advanced composite reinforcement for concrete structures, as well as corresponding members from Canada, Japan and USA. Meetings are held twice a year and on the research level its work is supported by the EU TMR (European Union Training and Mobility of Researchers) Network "ConFibreCrete”. The work of fib TG 9.3 is performed by five working parties (WP): Material Testing and Characterization (MT&C) Reinforced Concrete (RC) Prestressed Concrete (PC) Externally Bonded Reinforcement (EBR) Marketing and Applications (M&A) This technical report constitutes the work conducted as of to date by the EBR party. This bulletin gives detailed design guidelines on the use of FRP EBR, the practical execution and the quality control, based on the current expertise and state-of-the-art knowledge of the task group members. It is regarded as a progress report since it is not the aim of this report to cover all aspects of RC strengthening with composites. Instead, it focuses on those aspects that form the majority of the design problems. several of the topics presented are subject of ongoing research and development, and the details of some modelling approaches may be subject to future revisions. as knowledge in this field is advancing rapidly, the work of the EBR WP will continue. Inspite of this limit in scope, considerable effort has been made to present a bulletin that is today’s state-of-art in the area of strengthening of concrete structures by means of externally bonded FRP reinforcement.

Shear Strengthening of Reinforced Concrete Beams Using Fiber-Reinforced Polymer Wraps

Shear Strengthening of Reinforced Concrete Beams Using Fiber-Reinforced Polymer Wraps
Author : Anonim
Publisher : DIANE Publishing
Release Date : 2021
Category :
Total pages :129
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Design Procedures for the Use of Composites in Strengthening of Reinforced Concrete Structures

Design Procedures for the Use of Composites in Strengthening of Reinforced Concrete Structures
Author : Carlo Pellegrino,José Sena-Cruz
Publisher : Springer
Release Date : 2015-08-25
Category : Technology & Engineering
Total pages :392
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This book analyses the current knowledge on structural behaviour of RC elements and structures strengthened with composite materials (experimental, analytical and numerical approaches for EBR and NSM), particularly in relation to the above topics, and the comparison of the predictions of the current available codes/recommendations/guidelines with selected experimental results. The book shows possible critical issues (discrepancies, lacunae, relevant parameters, test procedures, etc.) related to current code predictions or to evaluate their reliability, in order to develop more uniform methods and basic rules for design and control of FRP strengthened RC structures. General problems/critical issues are clarified on the basis of the actual experiences, detect discrepancies in existing codes, lacunae in knowledge and, concerning these identified subjects, provide proposals for improvements. The book will help to contribute to promote and consolidate a more qualified and conscious approach towards rehabilitation and strengthening existing RC structures with composites and their possible monitoring.

Design of FRP Systems for Strengthening Concrete Girders in Shear

Design of FRP Systems for Strengthening Concrete Girders in Shear
Author : Abdeldjelil Belarbi
Publisher : Transportation Research Board
Release Date : 2011-01-01
Category : Concrete beams
Total pages :120
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TRB's National Cooperative Highway Research Program (NCHRP) Report 678: Design of FRP Systems for Strengthening Concrete Girders in Shear offers suggested design guidelines for concrete girders strengthened in shear using externally bonded Fiber-Reinforced Polymer (FRP) systems. The guidelines address the strengthening schemes and application of the FRP systems and their contribution to shear capacity of reinforced and prestressed concrete girders. The guidelines are supplemented by design examples to illustrate their use for concrete beams strengthened with different FRP systems. Appendix A of NCHRP Report 678, which contains the research agency's final report, provides further elaboration on the work performed in this project. Appendix A: Research Description and Findings, is only available online.

Composites for Construction

Composites for Construction
Author : Lawrence C. Bank
Publisher : John Wiley & Sons
Release Date : 2006-07-21
Category : Technology & Engineering
Total pages :551
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This text teaches readers how to analyse and design with fiber reinforced polymers (FRP) for civil engineering applications. It demystifies FRP composites and demonstrates applications where their properties make them ideal materials to consider off-shore and waterfront structures, factories, and storage tanks.

Flexural Strengthening of Reinforced Concrete Beams with Prestressed FRP Laminates

Flexural Strengthening of Reinforced Concrete Beams with Prestressed FRP Laminates
Author : An The Vinh,Carlo Pellegrino,Università degli studi di Padova,Escola Tècnica Superior d'Enginyers de Camins, Canals i Ports de Barcelona,Universitat Politècnica de Catalunya. Departament d'Enginyeria de la Construcció
Publisher : Unknown
Release Date : 2009
Category :
Total pages :58
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Retrofitting concrete structures with bonded fiber reinforced polymer (FRP) has grown to be a widely used method in all most parts of the world today. The main reason for the widespread application of FRP is that it is possible to obtain an effective strengthening with a relative small work effort. Furthermore, it is possible to carry out strengthening work without changing the current appearance or dimension of the structures. However, in most cases the bonded FRP materials are unstressed. If prestressing could be applied, better utilization of the strengthening material and a better strengthening result would most likely be achieved. Increasing research is carried out in the area of repair and upgrading of concrete structures with prestressed CFRP (Carbon Fiber Reinforced Polymers) materials. In this study, the flexural performance of reinforced concrete beams strengthened with CFRP plates using FRP bonding and prestressed FRP bonding has been mainly discussed by means of a Finite Element analysis.