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Author : Cathy Lee
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (551 download)
Download or read book Accelerated Corrosion and Repair of Reinforced Concrete Columns Using CFRP Sheets written by Cathy Lee and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Accelerated Corrosion and Repair of Reinforced Concrete Columns Using CFRP Sheets written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (614 download)
Download or read book Accelerated Corrosion and Repair of Reinforced Concrete Columns Using Carbon Fibre Reinforced Polymer Sheets written by and published by . This book was released on 2000 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study on the simulation of corrosion in a large-scale reinforced concrete column and their repair using carbon fibre reinforced polymer (CFRG) sheets is presented. Seven columns were subjected to an acclerated corrision regime, wrapped using CFRP sheets, then tested to structural failure and (or) subjected to further post-repair accelerated corrision, monitoring, and testing. Accelerated corrision was achieved by adding sodium chloride to the mixing water, applying a current to the reinforcemednt cage, and subjecting the specimens to cyclic, wetting and drying. Results showed that the CFRP repair greatly improved the strength of the repaired member and retarted the rate of post-repair corrosion. Moreover, subjecting the repaired column to extensive, post-repair corrosion resulted in no loss of strength or stiffness and only a slight reduction in the ductility of the repaired member.
Author : Ioulia Milman
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (133 download)
Download or read book CFRP Wraps for Corrosion Repair of Reinforced Concrete Columns and Corrosion Monitoring written by Ioulia Milman and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This experimental study is a part of an ongoing research project initiated by Lee (1998) and continued by Khajehpour (2001). This research is aimed at evaluating repair of large-scale reinforced concrete columns using carbon fibre reinforced polymer (CFRP) sheets, in terms of establishing the effect of wraps on the corrosion of steel reinforcement. This project involves the construction and testing of six reinforced concrete columns, testing eleven columns remaining from the previous study. Four specimens were repaired with CFRP wraps. Testing included accelerated corrosion of both new and repaired specimens and natural corrosion of the reinforcement in five columns (including two repaired), and one prism specimen. It was found that corrosion activity temporarily increases after repair. After initial increase, the rate of corrosion becomes the same as in unwrapped columns or slightly lower. Columns subjected to natural corrosion expand less than before repair due to restraining effect of the wrap. Columns subjected to accelerated corrosion do not expand for sometime, after which they expand gradually.
Author : M. Alexander
Publisher : CRC PressI Llc
ISBN 13 : 9780415396561
Total Pages : 544 pages
Book Rating : 4.3/5 (965 download)
Download or read book Concrete Repair, Rehabilitation and Retrofitting written by M. Alexander and published by CRC PressI Llc. This book was released on 2006-01-01 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: The First International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR 2005) was held in Cape Town, South Africa, in November 2005. The conference was a collaborative venture by researchers from the South African Research Programme in Concrete Materials (based at the Universities of Cape Town and The Witwatersrand) and The Construction Materials Section at Leipzig University in Germany. The conference focused on appropriate repairing, maintaining, rehabilitating, and, if necessary, retrofitting existing infrastructure with a view to extending its life and maximising its economic return.
Author :
Publisher :
ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.:/5 (123 download)
Download or read book Use of Carbon Fiber Reinforced Polymer (CFRP) Including Sheets, Rods, and Ropes in Strengthening and Repairing Long Reinforced Concrete Columns written by and published by . This book was released on 2020 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of FRP materials in strengthening and repairing of reinforced concrete (RC) structures has increased in the past two decades. Recently, FRP materials have become one of the most used materials in rehabilitation engineering. For seismic retrofitting of RC structures, usually the process involves strengthening or repairing the vertical support elements of the buildings or bridges. Although glass FRP (GFRP) and basalt FRP (BFRP) rods have been used in flexural strengthening of RC columns, NSM-CFRP rods have not been used yet. In addition, studies in the use of CFRP ropes in flexural strengthening or repairing of RC columns are not available. To address these gaps, an experimental investigation was conducted on the use of CFRP materials in strengthening and repairing RC columns. The investigation consisted of three main parts. The three parts focused on strengthening and repairing slender RC columns using CFRP materials. The first part of the investigation focused on the use of CFRP sheets, rods, and ropes in flexural strengthening of RC columns. The results showed that both EB and NSM techniques can effectively be used in strengthening slender RC columns. In addition, CFRP ropes are very effective in strengthening RC columns. Finally, a theoretical model was created to predict the load-displacement response of RC columns strengthened with EB-CFRP sheets and NSM-CFRP rods and ropes. The theoretical results showed good agreement with the experimental results. The second part of the investigation focused on the use of CFRP sheets and ropes in repairing damaged RC columns. Recently, RC columns have been upgraded and strengthened with FRP confinement all around the globe. Future cases of repair will likely encounter RC columns that were strengthened previously with FRP confinement. However, studies on repairing damaged columns that were enhanced by confinement before damage are not currently available. Moreover, there is a vital need for an emergency repair technique that can be used to rapidly repair damaged columns of essential structures after a seismic event. In this study, the time required to complete the repair was a key factor to propose a rapid CFRP-based repair technique. Test results showed that the proposed repair technique was effective not only by restoring the original strength, but also by improving the strength significantly. Moreover, the measured and idealized load-displacement response showed that the ductility of the repaired column was reasonably sufficient. The proposed technique appears promising and may be considered as a permanent repair technique. The third part of the investigation focused on the tensile strength of CFRP ropes anchored to concrete using chemical epoxy. One of the major problems with using fiber reinforced polymer (FRP) in strengthening reinforced concrete (RC) structures is premature debonding of FRP. Anchoring FRP materials to concrete has become associated with most of the strengthening techniques. In the present study, FRP anchors were made from carbon fiber reinforced polymer (CFRP) ropes and had long embedment to be used for flexural strengthening of RC columns. Test results showed that the pullout strength of CFRP anchors increased with the increase in embedment length, and no significant effect of the hole diameter on the pullout strength was observed. However, the bond strength increased with decreasing embedment length and hole diameter. For shorter embedment lengths, the distribution of the bond stress along the length of the anchor is expected to be more uniform than that of anchors with longer embedment lengths. The average bond stress (strength) is calculated by dividing the maximum pullout force by the embedment length. Therefore, increasing the embedment length without significant improvement in the pullout load results in lower bond strength. The observed pullout results and failure modes were compared to the predictions using available models. Finally, a modified model was proposed to predict the pullout strength of CFRP rope anchors.
Author : Michael Grantham
Publisher : CRC Press
ISBN 13 : 020386400X
Total Pages : 480 pages
Book Rating : 4.2/5 (38 download)
Download or read book Concrete Solutions written by Michael Grantham and published by CRC Press. This book was released on 2009-06-10 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete repair continues to be a subject of major interest to engineers and technologists worldwide. The concrete repair budget for the UK alone currently runs at some UKP 220 per annum. Some estimates have indicated that, worldwide, in 2010 the expenditure for maintenance and repair work will represent about 85% of the total expenditure in the co
Author : Mohamad Imad Baiyasi
Publisher :
ISBN 13 :
Total Pages : 292 pages
Book Rating : 4.3/5 (129 download)
Download or read book Repair of Corrosion-damaged Columns Using FRP Wraps written by Mohamad Imad Baiyasi and published by . This book was released on 2000 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CFRP Wraps for Corrosion Repair of Reinforced Concrete Columns and Corrosion Monitoring written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Habib Tabatabai
Publisher :
ISBN 13 :
Total Pages : 342 pages
Book Rating : 4.3/5 (555 download)
Download or read book Rehabilitation Techniques for Concrete Bridges written by Habib Tabatabai and published by . This book was released on 2005 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Vistasp M. Karbhari
Publisher : Elsevier
ISBN 13 : 0857090925
Total Pages : 318 pages
Book Rating : 4.8/5 (57 download)
Download or read book Service Life Estimation and Extension of Civil Engineering Structures written by Vistasp M. Karbhari and published by Elsevier. This book was released on 2010-12-20 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Service life estimation is an area of growing importance in civil engineering both for determining the remaining service life of civil engineering structures and for designing new structural systems with well-defined periods of functionality. Service life estimation and extension of civil engineering structures provides valuable information on the development and use of newer and more durable materials and methods of construction, as well as the development and use of new techniques of estimating service life. Part one discusses using fibre reinforced polymer (FRP) composites to extend the service-life of civil engineering structures. It considers the key issues in the use of FRP composites, examines the possibility of extending the service life of structurally deficient and deteriorating concrete structures and investigates the uncertainties of using FRP composites in the rehabilitation of civil engineering structures. Part two discusses estimating the service life of civil engineering structures including modelling service life and maintenance strategies and probabilistic methods for service life estimation. It goes on to investigate non-destructive evaluation and testing (NDE/NDT) as well as databases and knowledge-based systems for service life estimation of rehabilitated civil structures and pipelines. With its distinguished editors and international team of contributors Service life estimation and extension of civil engineering structures is an invaluable resource to academics, civil engineers, construction companies, infrastructure providers and all those with an interest in improving the service life, safety and reliability of civil engineering structures. A single source of information on the service life of reinforced concrete and fibre-reinforced polymer (FRP) rehabilitated structures Examines degradation mechanisms in composites for rehabilitation considering uncertainties in FRP reliability Provides an overview of probabilistic methods for rehabilitation and service life estimation of corroded structures
Author : Hoang-Hung Tran-Nguyen
Publisher : Springer
ISBN 13 : 9811067139
Total Pages : 1181 pages
Book Rating : 4.8/5 (11 download)
Download or read book Proceedings of the 4th Congrès International de Géotechnique - Ouvrages -Structures written by Hoang-Hung Tran-Nguyen and published by Springer. This book was released on 2017-10-20 with total page 1181 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume for the 4th international conference CIGOS 2017 (Congrès International de Géotechnique - Ouvrages - Structures) presents novel technologies, solutions and research advances, making it an excellent guide in civil engineering for researchers, students, and professional engineers alike. Since 2010, CIGOS has become a vital forum for international scientific exchange on civil engineering. It aims to promote beneficial economic partnerships and technology exchanges between enterprises, worldwide institutions and universities. Following the success of the last three CIGOS conferences (2010, 2013 and 2015), the 4th conference was held at Ho Chi Minh City University of Technology, Ho Chi Minh City (Saigon), Vietnam on 26 to 27 October 2017. The main scientific themes of CIGOS 2017 were focused on ‘New Challenges in Civil Engineering’.
Author : L C Hollaway
Publisher : Elsevier
ISBN 13 : 1845694899
Total Pages : 415 pages
Book Rating : 4.8/5 (456 download)
Download or read book Strengthening and Rehabilitation of Civil Infrastructures Using Fibre-Reinforced Polymer (FRP) Composites written by L C Hollaway and published by Elsevier. This book was released on 2008-07-18 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: The repair of deteriorated, damaged and substandard civil infrastructures has become one of the most important issues for the civil engineer worldwide. This important book discusses the use of externally-bonded fibre-reinforced polymer (FRP) composites to strengthen, rehabilitate and retrofit civil engineering structures, covering such aspects as material behaviour, structural design and quality assurance. The first three chapters of the book review structurally-deficient civil engineering infrastructure, including concrete, metallic, masonry and timber structures. FRP composites used in rehabilitation and surface preparation of the component materials are also reviewed. The next four chapters deal with the design of FRP systems for the flexural and shear strengthening of reinforced concrete (RC) beams and the strengthening of RC columns. The following two chapters examine the strengthening of metallic and masonry structures with FRP composites. The last four chapters of the book are devoted to practical considerations in the flexural strengthening of beams with unstressed and prestressed FRP plates, durability of externally bonded FRP composite systems, quality assurance and control, maintenance, repair, and case studies. With its distinguished editors and international team of contributors, Strengthening and rehabilitation of civil infrastructures using fibre-reinforced polymer (FRP) composites is a valuable reference guide for engineers, scientists and technical personnel in civil and structural engineering working on the rehabilitation and strengthening of the civil infrastructure. Reviews the use of fibre-reinforced polymer (FRP) composites in structurally damaged and sub-standard civil engineering structures Examines the role and benefits of fibre-reinforced polymer (FRP) composites in different types of structures such as masonry and metallic strengthening Covers practical considerations including material behaviour, structural design and quality assurance
Author :
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (1 download)
Download or read book Structural Integrity of RC Columns Wrapped with FRP Sheet Subjected to Various Environmental Conditions Including Corrosion written by and published by . This book was released on 2004 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the short-term performance of reinforced concrete (RC) columns wrapped with fiber reinforced polymer (FRP) composite materials has been widely studied, research studies on the long-term performance are limited. The objective of this study was to evaluate the effects of various environmental conditions on the long-term behavior of RC columns wrapped with FRP sheets. The experimental program comprised two parts - ambient environmental effect tests and corrosion tests. The environmental conditions considered in the ambient environmental tests included (1) freeze-thaw cycles, (2) high-temperature cycles, (3) high-humidity cycles, (4) ultraviolet (UV) radiation, and (5) saline solution; while the corrosion tests dealt with the corrosion of steel reinforcement embedded in RC columns wrapped with FRP sheets. RC columns were wrapped with carbon fiber reinforced polymer (CFRP) sheets and glass fiber reinforced polymer (GFRP) sheets and conditioned under the environmental conditions listed. After the environmental conditioning, uni-axial compression tests were conducted in order to evaluate the effects on the mechanical properties, such as column capacity, stiffness, and ductility.
Author : Perumalsamy Balaguru
Publisher : CRC Press
ISBN 13 : 0203926889
Total Pages : 348 pages
Book Rating : 4.2/5 (39 download)
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.
Author : Dejian Shen
Publisher : Springer Nature
ISBN 13 : 9819979846
Total Pages : 394 pages
Book Rating : 4.8/5 (199 download)
Download or read book Seismic Performance of Corroded Reinforced Concrete Structures Retrofitted with FRP written by Dejian Shen and published by Springer Nature. This book was released on with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. Roorda
Publisher : Springer Science & Business Media
ISBN 13 : 9401154767
Total Pages : 393 pages
Book Rating : 4.4/5 (11 download)
Download or read book Trends in Structural Mechanics written by J. Roorda and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: The desire to understand the mechanics of elastic and plastic solids, new materials and the stability, reliability and dynamic behaviour of structures and their components under extreme environmental conditions has dominated research in structural engineering for many decades. Advances in these areas have revolutionized design methods, codes of practice, and the teaching of structural engineers. In this volume an international body of leading authorities presents some forty papers on current research directions in the specific areas of solid mechanics, structural computation, modern materials and their application, buckling and instability, design of structural systems and components, reliability, seismic analysis, and engineering education. They were presented at a symposium held July 10-12, 1994, at the University of Waterloo, Canada, to honour Professor Archibald Norbert Sherbourne who recently retired from a long and active career of teaching, research and academic administration at this University. The themes of the work contained within this volume reflect Professor Sherbourne's own research interests and will be of interest to both academics and practicing structural engineers.
