Experimental and Numerical Investigations on Bond Durability of CFRP Strengthened Concrete Members Subjected to Environmental Exposure

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ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.:/5 (897 download)

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Book Synopsis Experimental and Numerical Investigations on Bond Durability of CFRP Strengthened Concrete Members Subjected to Environmental Exposure by : Haider Al-Jelawy

Download or read book Experimental and Numerical Investigations on Bond Durability of CFRP Strengthened Concrete Members Subjected to Environmental Exposure written by Haider Al-Jelawy and published by . This book was released on 2013 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of tensile tests on FRP coupons indicate that both epoxy and polyurethane FRP systems do not degrade significantly under environmental exposure. However, flexural tests on the FRP strengthened concrete beams indicate that bond between FRP and concrete shows significant degradation, especially for aqueous exposure. Moreover, a protective coating suppresses the measured degradation. Also, experimental load-displacement curves for control beams show excellent agreement with numerical load-displacement curves obtained using the proposed bond model. Finally, a bond-slip model is predicted for concrete leachate conditioned beams by matching load-displacement curves for those beams with numerical load-displacement curves.

Durability of Composites for Civil Structural Applications

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Publisher : Woodhead Publishing
ISBN 13 :
Total Pages : 392 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Durability of Composites for Civil Structural Applications by : Institute of Materials, Minerals, and Mining

Download or read book Durability of Composites for Civil Structural Applications written by Institute of Materials, Minerals, and Mining and published by Woodhead Publishing. This book was released on 2007-07-25 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides practising engineers, decision makers and students with a useful and fundamental guide to the use of FRP composites within civil and structural engineering. A P Mouritz, RMIT, Australia.

Structures Strengthened with Bonded Composites

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Publisher : Woodhead Publishing
ISBN 13 : 0128210893
Total Pages : 558 pages
Book Rating : 4.1/5 (282 download)

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Book Synopsis Structures Strengthened with Bonded Composites by : Zhishen Wu

Download or read book Structures Strengthened with Bonded Composites written by Zhishen Wu and published by Woodhead Publishing. This book was released on 2020-07-15 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structures Strengthened with Bonded Composites presents a comprehensive resource on the strengthening of concrete, reinforced and prestressed concrete, masonry, steel and other composite structures using externally-bonded FRP composites. The book emphasizes a systematic and fundamental investigation on bonding and debonding behavior of the FRP-concrete interface and structural performances of FRP-strengthened structures with a combination of experimental, theoretical and numerical studies. This book will appeal to all those concerned with strengthening and retrofitting of existing structures from the effect of additional anticipated loads in the civil sector. - Discusses the FRP strengthening of different types of structures, including bridges, tunnels, buildings, historic structures and underwater constructions - Establishes a systematic theory on interfacial fracture mechanics and clarifies different debonding mechanisms - Describes design methods and makes comparison of design considerations and methods among different countries - Presents temperature and fatigue effects and long-term behavior for different strengthening methods

Brick and Block Masonry - From Historical to Sustainable Masonry

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Publisher : CRC Press
ISBN 13 : 1000225577
Total Pages : 1097 pages
Book Rating : 4.0/5 (2 download)

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Book Synopsis Brick and Block Masonry - From Historical to Sustainable Masonry by : Jan Kubica

Download or read book Brick and Block Masonry - From Historical to Sustainable Masonry written by Jan Kubica and published by CRC Press. This book was released on 2020-07-06 with total page 1097 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brick and Block Masonry - From Historical to Sustainable Masonry contains the keynote and semi-keynote lectures and all accepted regular papers presented online during the 17th International Brick and Block Masonry Conference IB2MaC (Kraków, Poland, July 5-8, 2020). Masonry is one of the oldest structures, with more than 6,000 years of history. However, it is still one of the most popular and traditional building materials, showing new and more attractive features and uses. Modern masonry, based on new and modified traditional materials and solutions, offers a higher quality of life, energy savings and more sustainable development. Hence, masonry became a more environmentally friendly building structure. Brick and Block Masonry - From Historical to Sustainable Masonry focuses on historical, current and new ideas related to masonry development, and will provide a very good platform for sharing knowledge and experiences, and for learning about new materials and technologies related to masonry structures. The book will be a valuable compendium of knowledge for researchers, representatives of industry and building management, for curators and conservators of monuments, and for students.

Durability of Carbon Fibre Reinforced Polymer Concrete Bond Under Sustained Load in Harsh Environment

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Publisher :
ISBN 13 :
Total Pages : 524 pages
Book Rating : 4.:/5 (92 download)

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Book Synopsis Durability of Carbon Fibre Reinforced Polymer Concrete Bond Under Sustained Load in Harsh Environment by : Basim M. Mahdi Abbas

Download or read book Durability of Carbon Fibre Reinforced Polymer Concrete Bond Under Sustained Load in Harsh Environment written by Basim M. Mahdi Abbas and published by . This book was released on 2010 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Fibre Reinforced Polymer (CFRP) has great potential in civil engineering applications. It is used extensively in extending the structural capacity or service life of aging structures. CFRP is one of the best alternatives to traditional retrofitting materials. It has a very high strength-to-weight ratio with good resistance to environmental effects. Together with the fibres, the adhesive and the substratum are the main constituents of the CFRP bonding systems. However, with high quality plated CFRP, the latter two components introduce some doubts about the system's performance. There is therefore a crucial research need to investigate the effects of environmental exposures on the system under loading conditions. In the present work, the effects of extreme environmental exposures on the bond properties between externally-applied carbon fibre reinforced polymer (CFRP) and concrete were investigated. Preloaded CFRP-concrete samples at various load intensities were exposed to several conditions. The exposure conditions were temperature cycles with humidity, constant temperature at increasing humidity, soaking in saline water at different temperatures, and different salt concentrations. Finally, actual extreme marine site environments including direct exposure to sunlight were explored. The change of bond characteristics between the externally-applied CFRP and concrete due to permanent loads, aging, and exposure conditions were used as measures of degradation effects. Other properties such as the development of the strain field with load, bond-slip relationships, detection of cracking intensity and location were evaluated using photogrammetry and acoustic emission techniques. Tensile pull-out and torsional shear strength were also explored. A Neural Network method was implemented for the prediction of bond strength and the expected failure of preloaded samples in different environments. The objective of the study was to understand the behaviour of preloaded concrete-CFRP bonding systems and evaluate the changes in the bond properties due to combinations of factors in harsh environments. It was found that high temperature and the combined aggressive site conditions were the major factors leading to sample failure.

Durability of Concrete Exposed to Natural Weathering

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Publisher :
ISBN 13 :
Total Pages : 82 pages
Book Rating : 4.X/5 (1 download)

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Book Synopsis Durability of Concrete Exposed to Natural Weathering by : Waterways Experiment Station (U.S.)

Download or read book Durability of Concrete Exposed to Natural Weathering written by Waterways Experiment Station (U.S.) and published by . This book was released on 1950 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Bond Behaviour of FRP in Structures

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ISBN 13 :
Total Pages : 610 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Bond Behaviour of FRP in Structures by : J. F. Chen

Download or read book Bond Behaviour of FRP in Structures written by J. F. Chen and published by . This book was released on 2005 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Design Guidelines for Durability of Bonded CFRP Repair/strengthening of Concrete Beams

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Publisher :
ISBN 13 :
Total Pages : 53 pages
Book Rating : 4.:/5 (829 download)

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Book Synopsis Design Guidelines for Durability of Bonded CFRP Repair/strengthening of Concrete Beams by :

Download or read book Design Guidelines for Durability of Bonded CFRP Repair/strengthening of Concrete Beams written by and published by . This book was released on 2010 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research provides a methodology for evaluation of durability related strength loss of bonded carbon fiber reinforced polymer (CFRP) systems applied to concrete beams. The report addresses test methods to establish a durability strength reduction factor, identification of corresponding field exposure conditions affecting durability, and suggestions for the application of the durability strength reduction factor for design of field applications. The durability strength reduction factor is a measure of the loss in strength over time due to environmental exposure. It is defined as the ratio of the flexural strength of a 4 in. x 4 in. x 14 in. concrete beam reinforced with CFRP exposed at 140°F and submerged in water or 100% relative humidity for 60 days to the flexural strength of a control specimen. The resulting durability strength reduction factor may be used to evaluate CFRP system performance. Two field environments are suggested: Wet and Air. In a Wet environment water accumulates at the bond surface. This is the default condition and corresponds to test results in submerged water at 140°F for 60 days. An Air environment allows drying between wetting episodes so water cannot accumulate on the bond surface. This condition corresponds to test results in 100% relative humidity at 140°F for 60 days.

Nondestructive Testing of Materials and Structures

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Publisher : Springer Science & Business Media
ISBN 13 : 9400707231
Total Pages : 1231 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Nondestructive Testing of Materials and Structures by : Oral Büyüköztürk

Download or read book Nondestructive Testing of Materials and Structures written by Oral Büyüköztürk and published by Springer Science & Business Media. This book was released on 2012-09-14 with total page 1231 pages. Available in PDF, EPUB and Kindle. Book excerpt: Condition assessment and characterization of materials and structures by means of nondestructive testing (NDT) methods is a priority need around the world to meet the challenges associated with the durability, maintenance, rehabilitation, retrofitting, renewal and health monitoring of new and existing infrastructures including historic monuments. Numerous NDT methods that make use of certain components of the electromagnetic and acoustic spectrum are currently in use to this effect with various levels of success and there is an intensive worldwide research effort aimed at improving the existing methods and developing new ones. The knowledge and information compiled in this book captures the current state of the art in NDT methods and their application to civil and other engineering materials and structures. Critical reviews and advanced interdisciplinary discussions by world-renowned researchers point to the capabilities and limitations of the currently used NDT methods and shed light on current and future research directions to overcome the challenges in their development and practical use. In this respect, the contents of this book will equally benefit practicing engineers and researchers who take part in characterization, assessment and health monitoring of materials and structures.

Advances in FRP Composites in Civil Engineering

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Publisher : Springer Science & Business Media
ISBN 13 : 3642174876
Total Pages : 956 pages
Book Rating : 4.6/5 (421 download)

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Book Synopsis Advances in FRP Composites in Civil Engineering by : Lieping Ye

Download or read book Advances in FRP Composites in Civil Engineering written by Lieping Ye and published by Springer Science & Business Media. This book was released on 2012-02-01 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Advances in FRP Composites in Civil Engineering" contains the papers presented at the 5th International Conference on Fiber Reinforced Polymer (FRP) Composites in Civil Engineering in 2010, which is an official conference of the International Institute for FRP in Construction (IIFC). The book includes 7 keynote papers which are presented by top professors and engineers in the world and 203 papers covering a wide spectrum of topics. These important papers not only demonstrate the recent advances in the application of FRP composites in civil engineering, but also point to future research endeavors in this exciting area. Researchers and professionals in the field of civil engineering will find this book is exceedingly valuable. Prof. Lieping Ye and Dr. Peng Feng both work at the Department of Civil Engineering, Tsinghua University, China. Qingrui Yue is a Professor at China Metallurgical Group Corporation.

Corrosion Prevention and Protection

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Publisher : John Wiley & Sons
ISBN 13 : 0470024038
Total Pages : 574 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Corrosion Prevention and Protection by : Edward Ghali

Download or read book Corrosion Prevention and Protection written by Edward Ghali and published by John Wiley & Sons. This book was released on 2007-01-30 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion Prevention and Protection: Practical Solutions presents a functional approach to the various forms of corrosion, such as uniform corrosion, pitting corrosion, crevice corrosion, galvanic corrosion, stress corrosion, hydrogen-induced damage, sulphide stress cracking, erosion-corrosion, and corrosion fatigue in various industrial environments. The book is split into two parts. The first, consisting of five chapters: Introduction and Principles (Fundamentals) of Corrosion Corrosion Testing, Detection, Monitoring and Failure Analysis Regulations, Specifications and Safety Materials: Metals, Alloys, Steels and Plastics Corrosion Economics and Corrosion Management The second part of the book consists of two chapters which present: a discussion of corrosion reactions, media, active and active-passive corrosion behaviour and the various forms of corrosion, a collection of case histories and practical solutions which span a wide range of industrial problems in a variety of frequently encountered environments, including statues & monuments, corrosion problems in metallurgical and mineral processing plants, boilers, heat exchangers and cooling towers, aluminum and copper alloys, galvanized steel structures as well as hydrogeological environmental corrosion This text is relevant to researchers and practitioners, engineers and chemists, working in corrosion in industry, government laboratories and academia. It is also suitable as a course text for engineering students as well as libraries related to chemical and chemical engineering institutes and research departments.

Development of Modified Adhesives for Bond Between CFRP and Concrete Subjected to Harsh Environmental Conditions

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Publisher :
ISBN 13 :
Total Pages : 770 pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Development of Modified Adhesives for Bond Between CFRP and Concrete Subjected to Harsh Environmental Conditions by : Rawaa Al-Safy

Download or read book Development of Modified Adhesives for Bond Between CFRP and Concrete Subjected to Harsh Environmental Conditions written by Rawaa Al-Safy and published by . This book was released on 2011 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: The attractive properties of carbon fibre reinforced polymers (CFRPs) have made such composites effective materials to use for the rehabilitation and strengthening of existing concrete structures. The wet-lay up method is the most commonly used installation technique for CFRP applications due to its many advantages, including flexibility in coping with different geometries. CF fabrics are adhesively saturated and glued to the concrete structure. The adhesive in the strengthening system transfers the stresses from the concrete member to the CFRP. Two-part thermosetting-based adhesives are commonly used for bonding CFRP to concrete elements and such adhesives are designed for ambient temperature curing. The performance of CFRP/concrete systems is affected by the operating temperature, and the adhesive is the element in the strengthened system most sensitive to the temperature effect, since the majority of bonding adhesives are of low glass transition temperature (Tg) materials. As this temperature is approached or exceeded, the integrity of the interfacial bond in the CFRP/concrete system diminishes rapidly due to deterioration in the adhesive properties caused by the loss of the ability to transfer stresses.Improvements in adhesive properties have been documented in the research literature in the aerospace and materials fields using many methods. These improvements are based on the fact that the modulus and Tg of polymers can be improved by increasing the cross-links (chemical bonds between the epoxy chains) in the polymer network, reducing the mobility of the polymer molecule segments, reducing the amount of un-reacted epoxy resin, and using nanomaterials as reinforcement. The incorporation of such modifiers to improve the properties of the adhesive used for infrastructure applications, namely for externally-bonded CF fabric to concrete members, needed to be investigated. In addition, the effect of applying such modified adhesives on the interfacial bond efficiency of CFRP/concrete system needed to be explored.The main focus of the work reported in the present study is the improvement of the thermo-mechanical properties of the adhesive used to bond CF fabric to concrete members. Reinforcement with two different types of nanomaterials was used to modify a commercially-available epoxy adhesive commonly used for externally bonding CF fabric to concrete substrates. Nanoclay (NC) and carbon nanofibres (VGCF) were chosen to modify the epoxy adhesive used in civil engineering applications because of their unique properties, including low cost, ready availability and high aspect ratio. Other types of modification were carried out by the use of highly cross-linked epoxy-based resin (DGOA) to replace partially and completely the monomer of the commercially-available epoxy adhesive for CFRP applications. Post-curing at high temperature and at moderately elevated temperatures was adopted to study the effect of such techniques on the adhesive properties, as well as on the interfacial bond of CFRP/concrete systems under different environmental conditions. The practicality of post-curing techniques was also studied by exploring the application of such techniques after different ambient curing periods.The influence of modification on pure adhesive properties was studied. The glass transition temperature of the epoxy adhesive with and without modification, measured by the Dynamic Mechanical Thermal Analysis (DMTA) and Differential Scanning Calorimetry (DSC) techniques, was addressed, as well as storage modulus using DMTA. Tensile properties at various temperature levels were evaluated by testing adhesive coupons at these temperatures. Characterisation of the structure of the adhesive with and without modification was investigated by different techniques including X-Ray Diffraction (XRD), Transmission Electron Microscopy (TEM), Differential Scanning Calorimetry (DSC) and Near-Infrared spectroscopy (NIR). The efficiency of the bond in the fabricated CFRP/concrete specimens using modified adhesives was explored by means of adhesion (pull-off) tests and single-lap shear tests at elevated temperatures and the failure loads and modes were analyzed. The integrity of the interfacial bond in loaded CFRP/concrete systems using modified adhesives was explored under harsh environmental conditions based on the combined effects of temperature and humidity. The practicality of post-curing applications was investigated by studying the properties of the adhesives and the bond performance of CFRP/concrete systems by post-curing at high temperatures and moderately elevated temperatures after different curing periods at ambient conditions. It was found that the chemical structure of the epoxy resin is an important parameter in the enhancement of the adhesive properties (Tg , modulus and tensile properties), hence the interfacial bond in CFRP/concrete systems. Nanomaterials were also found to enhance the modulus of the epoxy adhesive. Adequate bond performance in CFRP/concrete systems under different service conditions was achieved, even in the absence of the primer layer when a highly cross-linked epoxy adhesive was used for bonding. The application of post-curing at moderately elevated temperatures is recommended to improve the integrity of CFRP/concrete systems under severe environmental conditions. The outcomes of the experimental program provide a new understanding of the thermal behaviour of the adhesives used in civil engineering applications and allow recommendations for further applications at different environmental temperatures. In addition, the experimental work on the bond-slip relationships using post-curing techniques at moderately elevated temperatures provide guidelines for numerical simulations to be investigated in future studies of bond performance in the CFRP/concrete system.

FRCM Composites for Strengthening Corrosion-damaged Structures

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Publisher :
ISBN 13 :
Total Pages : 213 pages
Book Rating : 4.:/5 (113 download)

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Book Synopsis FRCM Composites for Strengthening Corrosion-damaged Structures by : Mohammed Elghazy

Download or read book FRCM Composites for Strengthening Corrosion-damaged Structures written by Mohammed Elghazy and published by . This book was released on 2018 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of steel reinforcement is one of the most destructive mechanisms for reinforced concrete (RC) structures. Corrosion not only impairs the structural integrity and the serviceability of the damaged structure, but it may also lead to unexpected and brittle failures. Despite the rigorous provisions of most codes of practice to avoid corrosion, evidences of corrosion damage are still being reported. Recently, fabric-reinforced cementitious matrix (FRCM) systems were proposed as an innovative strengthening/repair technique for RC structures to overcome the drawbacks associated with the use of the well-documented fiber-reinforced polymer (FRP) systems. While the use of FRCM composites to strengthen un-damaged RC members has proven its efficiency, very little is known about the viability of their use to retrofit RC members with various levels of corrosion damage. In addition, the post-repair performance and the long-term durability of the FRCM-strengthened corroded members, which most likely will be exposed to the same environmental conditions that have prevailed prior their repair, have not received attention in the literature. Moreover, most of our infrastructures such as bridges and parking garages are susceptible to corrosion damage while continuously being subjected to oscillatory loads that cause fatigue. To date, no information is available about the effect of combining fatigue loading with corrosion in FRCM-strengthened structures. In this work, the monotonic and fatigue flexural behaviors of corrosion-damaged RC beams strengthened with FRCM systems were investigated in addition to their long-term performance, i.e. after further exposure to corrosive environment following their strengthening. The work includes experimental and numerical investigations. The analytical predictions and theoretical formulations that are currently available in the design codes have been verified against the experimental results. The experimental program consisted of testing thirty (30) large-scale RC beams of 150×250×2800 mm. The beams were constructed and tested under four-point load configuration. An accelerated corrosion process was utilized to corrode the bottom steel reinforcement in the middle third of the test specimens. The test parameters included the level of corrosion damage (represented by 10, 20, and 30% mass loss in the tensile steel), the type of the strengthening system used (Polyparaphenylene benzobisoxazole (PBO-FRCM), C-FRCM, and FRP), the amount of FRCM composites (1, 2, 3, and 4 layers), the FRCM strengthening Scheme (end-anchored versus continuously wrapped layers), and the loading regime (monotonic and fatigue). The test results showed that the use of FRCM composites significantly enhanced the flexural behavior of the corroded beams. FRCM governed the failure mode of the strengthened beams rather than the level of corrosion damage of the steel bars. FRCM-strengthened beams showed an increase in their ultimate strengths that ranged between 7 and 65% of that of the virgin (neither corroded nor strengthened) beam based on the type, amount, and Scheme of the FRCM used. Exposing the repaired beams to post-repair corrosion resulted in 23% reduction in the steel mass loss. The U-wrapped scheme was more efficient than the end-anchoring scheme in delaying the delamination of the FRCM plies in the short-term repaired beams. It also mitigated the effect of the longitudinal corrosion cracks and consequently increased the post-repair strengthening effectiveness of FRCM systems. Fatigue tests showed that corrosion of steel bars dramatically decreased the fatigue life of the unstrengthened-beams. Strengthening with FRCM composites increased the fatigue life of the corrosion-damaged beams by 38 to 377% of that of the corroded-unstrengthened beams. However, FRCM strengthening did not restore the fatigue life of the virgin beams. In the numerical study carried out in this work, three-dimensional finite element (FE) models were developed to simulate the nonlinear behavior of the corroded beams strengthened with FRCM and FRP composites using the software package ATENA-3D. The results of the numerical analysis were in good agreement with those obtained experimentally in terms of failure modes, strains, load-carrying capacities, and deflections. The developed FE models were able to capture the non-linear behavior of the tested beams with good accuracy. A parametric study was then conducted to investigate the effect of concrete compressive strength and thickness of concrete cover on the strengthening effectiveness of the composite systems. It was observed that failure of RCM-strengthened beams was independent of the compressive strength of concrete or the thickness of the concrete cover and was governed only by fabric slippage within the matrix. Analytically, the design equations of ACI-549.4R-13 (ACI 2013) were assessed using the experimental data obtained from the tests. It was concluded that the theoretical formulations of CI-549.4R-13 can reasonably predict the ultimate strengths of the end-anchored strengthened beams but underestimated those of continuously-anchored beams. A scheme factor of 1.1 was then proposed to calculate the nominal strength of beams strengthened with continuously-wrapped shape of FRCM. The outcome of this work has been published (or submitted for publication) in five journal articles and five conferences, as detailed throughout the thesis.

ICSECM 2019

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Publisher : Springer Nature
ISBN 13 : 9811572224
Total Pages : 609 pages
Book Rating : 4.8/5 (115 download)

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Book Synopsis ICSECM 2019 by : Ranjith Dissanayake

Download or read book ICSECM 2019 written by Ranjith Dissanayake and published by Springer Nature. This book was released on 2020-09-18 with total page 609 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights current research and developments in the area of Structural Engineering and Construction Management, which are important disciplines in Civil Engineering. It covers the following topics and categories of Structural Engineering. The main chapters/sections of the proceedings are Structural and Solid Mechanics, Construction Materials, Systems and Management, Loading Effects, Construction Safety, Architecture & Architectural Engineering, Coastal Engineering, Foundation engineering, Materials, Sustainability. The content of this book provides necessary knowledge for construction management practices, new tools and technologies on local and global levels in civil engineering which can mitigate the negative effects of built environment.​

Durability of Carbon Fiber Reinforced Polymer (CFRP) Repair/strengthening Concrete Beams

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Publisher : ProQuest
ISBN 13 : 9780549932734
Total Pages : 184 pages
Book Rating : 4.9/5 (327 download)

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Book Synopsis Durability of Carbon Fiber Reinforced Polymer (CFRP) Repair/strengthening Concrete Beams by : Jiangang Deng

Download or read book Durability of Carbon Fiber Reinforced Polymer (CFRP) Repair/strengthening Concrete Beams written by Jiangang Deng and published by ProQuest. This book was released on 2008 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon fiber-reinforced polymers (CFRP) have been widely used as externally epoxy-bonded reinforcement for repair and retrofit of existing concrete structures. As the use of CFRP in construction increases, it is essential to consider the long term behavior. In this study, concrete specimens with externally bonded CFRP composite systems were exposed to various accelerated ageing environments: different elevated temperature water immersion, varying relative humidity exposure, real-time solar exposure, pressurized hygrothermal exposure, and fatigue loading. Three-point loading test and direct tension test were used to evaluate the flexural and tensile strength of CFRP specimens. This research recommends that the durability strength reduction factor be defined as the ratio of the flexural strength of a test specimen after exposure for 60 days at 60C to the strength of a control specimen at the initiation of exposure. Test specimens, exposure environments, testing procedures, and field application environments are selected to assure uniform reporting, testing and application of durability strength reduction factors. Two exposure environments are recommended for design, wet and air. Water can diffuse through concrete and accumulate on the epoxy/concrete interface in a wet environment and is the default condition for design. An air environment precludes water accumulation but requires engineering design and validation to guarantee compliance. The resulting durability strength reduction factor may be used to (a) calculate the reduced strength for environmental exposure, (b) qualify a specific CFRP system, (c) compare durability reduction factors to those provided by system suppliers, and (d) confirm compliance with project specifications.

Basic Principles of Concrete Structures

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Publisher : Springer
ISBN 13 : 3662485656
Total Pages : 620 pages
Book Rating : 4.6/5 (624 download)

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Book Synopsis Basic Principles of Concrete Structures by : Xianglin Gu

Download or read book Basic Principles of Concrete Structures written by Xianglin Gu and published by Springer. This book was released on 2015-12-09 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the latest version of designing codes both for buildings and bridges (GB50010-2010 and JTG D62-2004), this book starts from steel and concrete materials, whose properties are very important to the mechanical behavior of concrete structural members. Step by step, analysis of reinforced and prestressed concrete members under basic loading types (tension, compression, flexure, shearing and torsion) and environmental actions are introduced. The characteristic of the book that distinguishes it from other textbooks on concrete structures is that more emphasis has been laid on the basic theories of reinforced concrete and the application of the basic theories in design of new structures and analysis of existing structures. Examples and problems in each chapter are carefully designed to cover every important knowledge point. As a basic course for undergraduates majoring in civil engineering, this course is different from either the previously learnt mechanics courses or the design courses to be learnt. Compared with mechanics courses, the basic theories of reinforced concrete structures cannot be solely derived by theoretical analysis. And compared with design courses, this course emphasizes the introduction of basic theories rather than simply being a translation of design specifications. The book will focus on both the theoretical derivations and the engineering practices.

10th International Conference on FRP Composites in Civil Engineering

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Publisher : Springer Nature
ISBN 13 : 3030881660
Total Pages : 2516 pages
Book Rating : 4.0/5 (38 download)

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Book Synopsis 10th International Conference on FRP Composites in Civil Engineering by : Alper Ilki

Download or read book 10th International Conference on FRP Composites in Civil Engineering written by Alper Ilki and published by Springer Nature. This book was released on 2021-11-26 with total page 2516 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume highlights the latest advances, innovations, and applications in the field of FRP composites and structures, as presented by leading international researchers and engineers at the 10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE), held in Istanbul, Turkey on December 8-10, 2021. It covers a diverse range of topics such as All FRP structures; Bond and interfacial stresses; Concrete-filled FRP tubular members; Concrete structures reinforced or pre-stressed with FRP; Confinement; Design issues/guidelines; Durability and long-term performance; Fire, impact and blast loading; FRP as internal reinforcement; Hybrid structures of FRP and other materials; Materials and products; Seismic retrofit of structures; Strengthening of concrete, steel, masonry and timber structures; and Testing. The contributions, which were selected by means of a rigorous international peer-review process, present a wealth of exciting ideas that will open novel research directions and foster multidisciplinary collaboration among different specialists.