Download or read book Flexural Ductility Improvement of Frp Reinforced Concrete Members written by Tak-Bun Denvid Lau and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Flexural Ductility Improvement of FRP-reinforced Concrete Members" by Tak-bun, Denvid, Lau, 劉特斌, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled Flexural Ductility Improvement of FRP-reinforced Concrete Members Submitted by LAU Tak Bun Denvid for the degree of Master of Philosophy at The University of Hong Kong in August 2006 Fiber-reinforced polymer (FRP) has become a practical alternative construction material for replacing conventional steel bars as reinforcement in concrete structures. Although recently guidelines for the design and construction of concrete reinforced with FRP bars are available, they are not comprehensive enough and some lack the support of experimental results. In addition, the testing method for determining the tensile strength of FRP bars still has room for improvement. One major problem in tensile tests of FRP bars is failure at the anchor or grip region. Existing guidelines about anchor protection of FRP bars are not practicable for most of tensile test machines. Therefore, theoretical and experimental analyses were carried out in this research to find a more suitable protection method for the anchor. Tensile tests were conducted on a large number of glass fiber-reinforced polymer (GFRP) bars having a range of diameters from 12 to 25mm. It was found that epoxy resin and aluminum are suitable materials for filler and anchor tube respectively. Finally, a more practicable and economical anchor design for FRP bars was proposed. Because FRP is a brittle material that has elastic behavior until failure, it greatly reduces the ductility of concrete members reinforced with FRP bars, which are referred to as FRPRC in this research. In order to improve the flexural ductility of an FRPRC i imember, and at the same time retain the high strength feature of its FRP bars, conventional steel longitudinal reinforcement is proposed to be added to form a hybrid FRPRC beam. To investigate the ductility improvement of hybrid FRPRC members, a number of beam specimens consisting of conventional steel-reinforced concrete (SRC) beams, pure FRPRC beams and hybrid FRPRC beams were fabricated and tested under three point monotonic loading. From the test results, it was evident that the hybrid FRPRC members behaved more ductile than the pure FRPRC beams, and the higher the degree of over-reinforcement (in terms of GFRP bars or both steel and GFRP bars), the more ductile the FRPRC beams. It is therefore concluded that the addition of conventional steel reinforcement could improvement the flexural ductility of FRPRC members, and over-reinforcement is a preferred approach in the design of FRPRC members to prevent brittle failure by fracture of FRP bars. In addition, to guarantee in the design that pure FRPRC sections are over-reinforced, it was proposed in this research that the over reinforcement ratio should be at least 40% larger than the balanced reinforcement ratio. The minimum content of FRP flexural reinforcement for strength was also investigated. Experimental results showed that the minimum FRP flexural reinforcement recommended by the existing guideline could be reduced by about 25%. As over-reinforcement is recommended in the design of FRPRC members, their failure is governed by concrete crushing in the compression zone. From the test results, it was found that stirrups with 135 hooks gave a better confinement for the compression zone, so that the ductility of FRPRC members could further be improved. ii ii DOI: 10.5353/th_b
Download or read book Flexural Ductility Improvement of Fiber reinforced Polymer Concrete written by Tak-bun Lau (Denvid) and published by . This book was released on 2006 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developments in fiber reinforced polymer FRP composites for civil engineering written by D. Lau and published by Elsevier Inc. Chapters. This book was released on 2013-05-15 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber-reinforced polymer (FRP) has been a practical alternative construction material for replacing steel in the construction industry for several decades. However, some mechanical weaknesses of FRP are still unresolved, which limit the extensive use of this material in civil infrastructure. In order to mitigate the disadvantage of using FRP, the concept of hybridization is delivered here. The advantages of hybrid structural systems include the cost effectiveness and the ability to optimize the cross section based on material properties of each constituent material. In this chapter, two major applications of hybrid FRP composites are discussed: (1) the internal reinforcement in reinforced concrete (RC) structures, and (2) the cables in long-span cable-stayed bridges. In order to improve the flexural ductility of FRP-reinforced concrete (FRPRC) beam, the additional steel longitudinal reinforcement is proposed such that the hybrid FRPRC beams contain both FRP and steel reinforcement. In order to improve the vibrational problem in pure FRP cables used in bridge construction, an innovative hybrid FRP cable which can inherently incorporate a smart damper is proposed. The objective of this chapter is to deliver an up-to-date review of hybrid FRP composite structures, including both the industrial practice and the research in academia. The advantages of using hybrid FRP composites for construction will also be described with experimental support. It is hoped that the reader will appreciate the concept of hybridization, which leads to the efficient utilization of all constituent materials in a bonded system.
Download or read book ACI 440 2R 17 Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures written by ACI Committee 440 and published by . This book was released on 2017-04-27 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Non Metallic FRP Reinforcement for Concrete Structures written by L. Taerwe and published by CRC Press. This book was released on 2004-06-02 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dealing with a wide range of non-metallic materials, this book opens up possibilities of lighter, more durable structures. With contributions from leading international researchers and design engineers, it provides a complete overview of current knowledge on the subject.
Download or read book Building Code Requirements for Structural Concrete ACI 318M 08 and Commentary written by American Concrete Institute and published by . This book was released on 2008 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FRP Composites for Reinforced and Prestressed Concrete Structures written by Perumalsamy Balaguru and published by CRC Press. This book was released on 2008-11-05 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: High strength fibre composites (FRPs) have been used with civil structures since the 1980s, mostly in the repair, strengthening and retrofitting of concrete structures. This has attracted considerable research, and the industry has expanded exponentially in the last decade. Design guidelines have been developed by professional organizations in a number of countries including USA, Japan, Europe and China, but until now designers have had no publication which provides practical guidance or accessible coverage of the fundamentals. This book fills this void. It deals with the fundamentals of composites, and basic design principles, and provides step-by-step guidelines for design. Its main theme is the repair and retrofit of un-reinforced, reinforced and prestressed concrete structures using carbon, glass and other high strength fibre composites. In the case of beams, the focus is on their strengthening for flexure and shear or their stiffening. The main interest with columns is the improvement of their ductility; and both strengthening and ductility improvement of un-reinforced structures are covered. Methods for evaluating the strengthened structures are presented. Step by step procedures are set out, including flow charts, for the various structural components, and design examples and practice problems are used to illustrate. As infrastructure ages worldwide, and its demolition and replacement becomes less of an option, the need for repair and retrofit of existing facilities will increase. Besides its audience of design professionals, this book suits graduate and advanced undergraduate students.
Download or read book Fibre reinforced Polymer Reinforcement for Concrete Structures written by Kiang-Hwee Tan and published by World Scientific. This book was released on 2003 with total page 755 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. Contents: .: Volume 1: Keynote Papers; FRP Materials and Properties; Bond Behaviour; Externally Bonded Reinforcement for Flexure; Externally Bonded Reinforcement for Shear; Externally Bonded Reinforcement for Confinement; FRP Structural Shapes; Volume 2: Durability and Maintenance; Sustained and Fatigue Loads; Prestressed FRP Reinforcement and Tendons; Structural Strengthening; Applications in Masonry and Steel Structures; Field Applications and Case Studies; Codes and Standards. Readership: Upper level graduates, graduate students, academics and researchers in materials science and engineering; practising engineers and project managers
Download or read book Developments in Fiber Reinforced Polymer FRP Composites for Civil Engineering written by Nasim Uddin and published by Elsevier. This book was released on 2013-05-15 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of fiber-reinforced polymer (FRP) composite materials has had a dramatic impact on civil engineering techniques over the past three decades. FRPs are an ideal material for structural applications where high strength-to-weight and stiffness-to-weight ratios are required. Developments in fiber-reinforced polymer (FRP) composites for civil engineering outlines the latest developments in fiber-reinforced polymer (FRP) composites and their applications in civil engineering.Part one outlines the general developments of fiber-reinforced polymer (FRP) use, reviewing recent advancements in the design and processing techniques of composite materials. Part two outlines particular types of fiber-reinforced polymers and covers their use in a wide range of civil engineering and structural applications, including their use in disaster-resistant buildings, strengthening steel structures and bridge superstructures.With its distinguished editor and international team of contributors, Developments in fiber-reinforced polymer (FRP) composites for civil engineering is an essential text for researchers and engineers in the field of civil engineering and industries such as bridge and building construction. - Outlines the latest developments in fiber-reinforced polymer composites and their applications in civil engineering - Reviews recent advancements in the design and processing techniques of composite materials - Covers the use of particular types of fiber-reinforced polymers in a wide range of civil engineering and structural applications
Download or read book Composites for Construction written by Lawrence C. Bank and published by John Wiley & Sons. This book was released on 2006-07-21 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first textbook on the design of FRP for structural engineering applications Composites for Construction is a one-of-a-kind guide to understanding fiber-reinforced polymers (FRP) and designing and retrofitting structures with FRP. Written and organized like traditional textbooks on steel, concrete, and wood design, it demystifies FRP composites and demonstrates how both new and retrofit construction projects can especially benefit from these materials, such as offshore and waterfront structures, bridges, parking garages, cooling towers, and industrial buildings. The code-based design guidelines featured in this book allow for demonstrated applications to immediately be implemented in the real world. Covered codes and design guidelines include ACI 440, ASCE Structural Plastics Design Manual, EUROCOMP Design Code, AASHTO Specifications, and manufacturer-published design guides. Procedures are provided to the structural designer on how to use this combination of code-like documents to design with FRP profiles. In four convenient sections, Composites for Construction covers: * An introduction to FRP applications, products and properties, and to the methods of obtaining the characteristic properties of FRP materials for use in structural design * The design of concrete structural members reinforced with FRP reinforcing bars * Design of FRP strengthening systems such as strips, sheets, and fabrics for upgrading the strength and ductility of reinforced concrete structural members * The design of trusses and frames made entirely of FRP structural profiles produced by the pultrusion process
Download or read book Ductility Behavior of Concrete Flexural Members Reinforced with a Hybrid Combination of GFRP and Mild Steel written by Michael Glenn Eilers and published by . This book was released on 2006 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: With proper reinforcement ratios, excessive deflections can be physically observed before a material failure in the mild steel or concrete can occur, thus providing an adequate warning system if service loads are exceeded, but remain under ultimate loads. The ductile properties of the mild steel are a main key in providing this warning system before catastrophic failure can occur.
Download or read book Steel Fiber Reinforced Concrete written by Harvinder Singh and published by Springer. This book was released on 2016-10-26 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses design aspects of steel fiber-reinforced concrete (SFRC) members, including the behavior of the SFRC and its modeling. It also examines the effect of various parameters governing the response of SFRC members in detail. Unlike other publications available in the form of guidelines, which mainly describe design methods based on experimental results, it describes the basic concepts and principles of designing structural members using SFRC as a structural material, predominantly subjected to flexure and shear. Although applications to special structures, such as bridges, retaining walls, tanks and silos are not specifically covered, the fundamental design concepts remain the same and can easily be extended to these elements. It introduces the principles and related theories for predicting the role of steel fibers in reinforcing concrete members concisely and logically, and presents various material models to predict the response of SFRC members in detail. These are then gradually extended to develop an analytical flexural model for the analysis and design of SFRC members. The lack of such a discussion is a major hindrance to the adoption of SFRC as a structural material in routine design practice. This book helps users appraise the role of fiber as reinforcement in concrete members used alone and/or along with conventional rebars. Applications to singly and doubly reinforced beams and slabs are illustrated with examples, using both SFRC and conventional reinforced concrete as a structural material. The influence of the addition of steel fibers on various mechanical properties of the SFRC members is discussed in detail, which is invaluable in helping designers and engineers create optimum designs. Lastly, it describes the generally accepted methods for specifying the steel fibers at the site along with the SFRC mixing methods, storage and transport and explains in detail methods to validate the adopted design. This book is useful to practicing engineers, researchers, and students.
Download or read book International Congress on Polymers in Concrete ICPIC 2018 written by Mahmoud M. Reda Taha and published by Springer. This book was released on 2018-04-06 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume collects the proceedings from the International Congress of Polymers in Concrete 2018 (ICPIC), held under the theme “Polymers for Resilient and Sustainable Concrete Infrastructure.” ICPIC 2018 provides an opportunity for researchers and specialists working in the fields of polymers to exchange ideas and follow the latest progress in the use of polymers in concrete infrastructure. It also showcases the use of polymers and polymer concrete in sustainable and resilient development, and provides a platform for local and overseas suppliers, developers, manufacturers and contractors using polymers, polymer concrete and polymer composites in concrete structures to develop new business opportunities and follow the latest developments in the field. The International Congress of Polymers in Concrete is an international forum that has taken place every three years for the last 40 years with the objective of following progress in the field of polymers and their use in concrete and construction. Following 15 successful congresses held in London (1975), Austin (1978), Koriyama (1981), Darmstadt (1984), Brighton (1987), Shanghai (1990), Moscow (1992), Oostende (1995), Bologna (1998), Honolulu (2001), Berlin (2004), Chuncheon (2007), Funchal (2010), Shanghai (2013) and Singapore (2015), the 16th ICPIC will take place in Washington, DC, from April 29 to May 1st, 2018.
Download or read book FRPRCS 5 written by C. J. Burgoyne and published by Thomas Telford. This book was released on 2001 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fibre reinforced plastics are increasingly being used as replacements for steel reinforcement in concrete structures. The reinforcement can be untensioned, or it can be in the form of prestressing tendons. It is also suitable for gluing onto the outside of a structure to improve flexural or shear performance. This book provides up-to-date research results to give engineers confidence in their design methods.
Download or read book Fiber Reinforced Concrete written by Nemkumar Banthia and published by . This book was released on 1998 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fibre reinforced Polymer Reinforcement For Concrete Structures In 2 Volumes Proceedings Of The Sixth International Symposium On Frp Reinforcement For Concrete Structures Frprcs 6 written by Kiang Hwee Tan and published by World Scientific. This book was released on 2003-06-20 with total page 1526 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Flexural ductility of prestressed concrete enhancement by lateral confinement written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 1992-09-01 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
