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Durability And Performance Of Carbon Fibre Reinforced Polymer Concrete Bonding System Under Tropical Climates
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Book Synopsis Durability and Performance of Carbon Fibre Reinforced Polymer-concrete Bonding System Under Tropical Climates by : Mohd. Hisbany Mohd. Hashim
Download or read book Durability and Performance of Carbon Fibre Reinforced Polymer-concrete Bonding System Under Tropical Climates written by Mohd. Hisbany Mohd. Hashim and published by . This book was released on 2010 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Performance of Carbon Fibre Reinforced Polymer (CFRP) Plate - Concrete Bonding Exposed to Tropical Climatic Condition by : Firdaus Johari
Download or read book The Performance of Carbon Fibre Reinforced Polymer (CFRP) Plate - Concrete Bonding Exposed to Tropical Climatic Condition written by Firdaus Johari and published by . This book was released on 2007 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stability and Failure of High Performance Composite Structures by : Shamsher Bahadur Singh
Download or read book Stability and Failure of High Performance Composite Structures written by Shamsher Bahadur Singh and published by Springer Nature. This book was released on 2022-07-05 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written to introduce the application of high-performance composite materials such as fiber reinforced polymers, functionally graded composites, and sustainable fiber reinforced composites for development of thin-walled plated structures, beams, girders, and deck structures subjected to different kinds of loads. This book also includes test cases and its validation with finite element method using general purpose commercial computer software. Moreover, the book also deals with design methodology of advanced composite materials based on different applications. The comprehensive overview of the state-of-the-art research on the high-performance composite structures dealing with their stability, response, and failure characteristics will be of significant interest to scientists, researchers, students, and engineers working in the thrust area of advanced composite structures. This book is also helpful for Ph.D. candidates for developing their fundamental understanding on high-performance composite structures, and it will also appropriate for master- and undergraduate-level courses on design of composite structures especially for Civil Engineering Infrastructures.
Book Synopsis Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges by : Nigel Powers
Download or read book Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges written by Nigel Powers and published by CRC Press. This book was released on 2018-07-04 with total page 5447 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges contains lectures and papers presented at the Ninth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2018), held in Melbourne, Australia, 9-13 July 2018. This volume consists of a book of extended abstracts and a USB card containing the full papers of 393 contributions presented at IABMAS 2018, including the T.Y. Lin Lecture, 10 Keynote Lectures, and 382 technical papers from 40 countries. The contributions presented at IABMAS 2018 deal with the state of the art as well as emerging concepts and innovative applications related to the main aspects of bridge maintenance, safety, risk, management and life-cycle performance. Major topics include: new design methods, bridge codes, heavy vehicle and load models, bridge management systems, prediction of future traffic models, service life prediction, residual service life, sustainability and life-cycle assessments, maintenance strategies, bridge diagnostics, health monitoring, non-destructive testing, field testing, safety and serviceability, assessment and evaluation, damage identification, deterioration modelling, repair and retrofitting strategies, bridge reliability, fatigue and corrosion, extreme loads, advanced experimental simulations, and advanced computer simulations, among others. This volume provides both an up-to-date overview of the field of bridge engineering and significant contributions to the process of more rational decision-making on bridge maintenance, safety, risk, management and life-cycle performance of bridges for the purpose of enhancing the welfare of society. The Editors hope that these Proceedings will serve as a valuable reference to all concerned with bridge structure and infrastructure systems, including students, researchers and engineers from all areas of bridge engineering.
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.
Book Synopsis Environmental Durability of Bond Behaviour Between Steel and Carbon Fibre Reinforced Polymer by : Tien Cuong Nguyen
Download or read book Environmental Durability of Bond Behaviour Between Steel and Carbon Fibre Reinforced Polymer written by Tien Cuong Nguyen and published by . This book was released on 2012 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the last three decades, many studies have proven the effective use of CFRP composites in strengthening and retrofitting steel structures. However, one of the main restrictions to more widespread use of CFRP in strengthening and rehabilitating steel structures has been the uncertainty in the durability of steel/CFRP adhesively-bonded systems. This is especially true when such systems are exposed to outdoor environments. The data reporting this issue in the literature is currently limited and thus a systematic investigation of the effects of outdoor environments are required.The outdoor environments mainly include temperature, moisture and ultraviolet.Temperature is a detrimental factor to the adhesive layer between steel and CFRP because it may reach the glass transition temperature (Tg) of the adhesive,leading to a rapid reduction in the bond strength. Moisture, as another aspect of the durability, by diffusion through the adhesive or transport along the oxide/adhesive interface or absorption through the porous adherend, can penetrate to the interfaces between the adhesive and the steel adherend. Once moisture has penetrated into the steel /CFRP systems, degradation can occur due to two types of degradation: the degradation of the adhesive itself, and the degradation of the adhesive/adherend interface. In terms of ultraviolet, although the Earth's atmosphere filters out most of the total solar radiation, 6% of the total solar radiant flux is ultraviolet radiation and is able to reach the Earth's surface. Ultraviolet radiation has a wavelength between 290 and 400 nm, and the energy created by these wavelengths can dissociate the molecule bonds inivmost polymers, leading to the degradation of polymeric materials. The degradation may range from mere surface discoloration to extensive loss of mechanical properties. It should be also mentioned that combining these degrading factors together with loading may cause a significant degradation in mechanical properties of steel /CFRP systems.Double strap joints were chosen to investigate the performance of steel/CFRP composite systems subjected to environmental effects. When a double strap joint is tensioned, the strain in the carbon fibres must develop directly from the bond between the metal and the fibre. In this way, the fundamental behaviour of the metal-fibre bond, including the maximum strength and the effective bond length, can be investigated under static load.In the present research, the first aim was to investigate the effects of elevated temperatures on the mechanical characteristics of steel /CFRP double strap joints. It was found that due to elevated temperatures, the joint failure mode changed from cohesion to CFRP and adhesive interface debonding. Effective bond length was found to rapidly increase. Finally, joint strength and stiffness significantly decreased with temperature especially when temperature reached above the glass transition temperature (Tg) of the adhesive. Based on the ultimate load prediction model developed by Hart-Smith for double lapjoints and kinetic modeling of the mechanical degradation of the adhesive, a mechanism-based model is proposed to describe the change of effective bond length, stiffness and strength degradation for steel/CFRP double strap joints at elevated temperatures.In the next part of the research, time factor was taken into account. By applying different load levels, the time-to-failure of the joints was monitored and analyzed. It was found that when temperature was close to or higher than Tg,the joint failure was time dependent. Based on the proposed temperature andtime-dependent material property models, the time dependence failure time of steel /CFRP double strap joints was well described.Next, the effects of long term exposure to UV and associated temperatures were investigated. It was shown that UV exposure does not influence the tensile strength of CFRP composites. The tensile strength of the adhesive reduced slightly while modulus showed significant increase after long term exposure.Although the tensile modulus of adhesive exposed to only thermal environment also increased, it is considerably less than that induced by UV exposure.The UV exposure also led to a decrease in joint strength but an increase in stiffness,caused by the temperature effect rather than the UV rays.The next stage of the research investigated the effects of sea water and moisture.It was shown that sea water appeared to reduce the joint strength and stiffness both by 20% after 1 year of exposure, and the joints exposed to combinations of temperature and humidity in the environmental chamber showed little decrease in joint strength and stiffness after 1000 h of exposure. A model was developed to predict the strength and stiffness degradation of the joints in sea-water and the results compared well with the experimental results.Finally, the effects of sustained load and curing were examined. It was found that the effects of sustained load were significant which could catastrophically cause joint failure when it was combined with cyclic temperature and humidity.Elevated curing of the steel /CFRP bonded joint helped to improve the mechanical performance of the joints at elevated temperatures and increased the time-to-failure of the joints. Partial safety factors proposed in design guidelines for FRP composites under environmental effects were used to evaluate the experimental results obtained, suggesting a very critical degradation of joint mechanical properties due to the environmental effects investigated in this study.
Book Synopsis Strengthening of Concrete Structures Using Carbon Fibre Reinforced Polymers and Cement-based Adhesives by : Siavash Hashemi
Download or read book Strengthening of Concrete Structures Using Carbon Fibre Reinforced Polymers and Cement-based Adhesives written by Siavash Hashemi and published by . This book was released on 2011 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Fiber Reinforced Polymers by : Martin Masuelli
Download or read book Fiber Reinforced Polymers written by Martin Masuelli and published by BoD – Books on Demand. This book was released on 2013-01-23 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber Reinforced Polymers are by no means new to this world. It is only because of our fascination with petrochemical and non-petrochemical products that these wonderful materials exist. In fact, the polymers can be considered and used in the construction and construction repair. The petrochemical polymers are of low cost and are used more that natural materials. The Fiber Reinforced Polymers research is currently increasing and entails a quickly expanding field due to the vast range of both traditional and special applications in accordance to their characteristics and properties. Fiber Reinforced Polymers are related to the improvement of environmental parameters, consist of important areas of research demonstrating high potential and particularly great interest, as civil construction and concrete repair.
Book Synopsis Durability Behavior of Fiber Reinforced Polymer and Steel Reinforced Polymer for Infrastructure Applications by : Wei Wang
Download or read book Durability Behavior of Fiber Reinforced Polymer and Steel Reinforced Polymer for Infrastructure Applications written by Wei Wang and published by . This book was released on 2017 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Crack development in reinforced concrete (RC) structures is common in elements such as bridge decks. However, these cracks can impose significant problems over time, because they allow chlorides from deicing chemicals to infiltrate concrete which will then corrode steel bars as RC structures are exposed to harsh weather. In the last decade, composite reinforcement systems are internally or externally applied to concrete structures instead of traditional steel reinforcing bars, or to strengthen concrete elements in flexure and shear. However, studies regarding the long-term durability performance of composite reinforcement systems is limited. Therefore, in order to popularize the application of these systems, it is necessary to study the long-term properties and behaviors of concrete members reinforced with composite materials. This study includes three topics: 1. Long-term durability of concrete panels reinforced with steel and glass reinforced polymer (GFRP). The main objective of this study is to investigate the mechanical properties of GFRP bars extracted from concrete panels after seven plus years of field exposure and examine any microscopic damage to the GFRP fiber and/or matrix resin; 2. Durability of concrete elements reinforced with Steel Reinforced Polymer (SRP). The key purpose of this study is to assess the bond behavior of SRP-to-concrete systems and provide durability study of SRP strengthening systems to supplement ACI 440; 3. Assessment of existing FRP bridge structures exposed to field conditioning. This study focuses on investigating the physical inspection for the existing FRP bridges in Rolla, MO and to characterize GFRP bars extracted from Southview Bridge (MO), Walker Bridge (MO), and Sierrita de la Cruz Bridge (TX) and surrounding concrete after several years of service"--Abstract, page iii.
Download or read book ACI Materials Journal written by and published by . This book was released on 1994 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fiber Reinforced Polymer Bar Investigation by : Ali Fadhil Al-Khafaji
Download or read book Fiber Reinforced Polymer Bar Investigation written by Ali Fadhil Al-Khafaji and published by . This book was released on 2021 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Corrosion of steel reinforcement and carbon dioxide emissions are two major global problems. Different methods, techniques, and materials have been implemented to mitigate these problems. Glass fiber-reinforced polymer (GFRP) bar presents itself as a solid alternative to replace conventional steel reinforcement owing to its fantastic features in resisting corrosion. Its demand is progressively increasing. Cement-based concrete, on the other hand, is not eco-friendly due to the excessive amount of carbon dioxide (CO2) emissions yielded from its cement production. One of the alternatives used to mitigate the use of cement in concrete is fly ash. Fly ash is considered a supplementary cementitious material (SCM) and has been only implemented partially to replace cement as a binding material in concrete, however its application has been limited to only limited doses (lower than 30%). In this study, durability and bond-slip investigations were carried out. The durability study was done on GFRP bars extracted from eleven bridges across the United States after being in service from 12 to 20 years. Several tests were conducted on the bar and the surrounding concrete to make the assessment. The tests results showed that there were slight sings for environmental attack but did not show any obvious signs for microstructural deteriorations. In addition, a bond-slip investigation was carried out to evaluate the bond performance of GFRP bars embedded in fly ash-based sustainable concrete. A high-volume fly ash (HVFA) concrete was implemented; 50% and 70% cement replaced with fly ash were used. The results showed that GFRP bars had less bond strength than that resulted from mild steel bars"--Abstract, page iv.
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.
Book Synopsis Mechanical Performance of Carbon Fibre Reinforced Vinyl Ester Composite Plate Bonded Concrete Exposed to Tropical Climate by : Shukur Abu Hassan
Download or read book Mechanical Performance of Carbon Fibre Reinforced Vinyl Ester Composite Plate Bonded Concrete Exposed to Tropical Climate written by Shukur Abu Hassan and published by . This book was released on 2007 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fiber-reinforced Polymer (FRP) Reinforcement for Concrete Structures by :
Download or read book Fiber-reinforced Polymer (FRP) Reinforcement for Concrete Structures written by and published by . This book was released on 2005 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Durability of Wet-bond Between Hybrid FRP Laminate and Cast-in-place Concrete by : Li Li
Download or read book Durability of Wet-bond Between Hybrid FRP Laminate and Cast-in-place Concrete written by Li Li and published by . This book was released on 2007 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of Bond Between Fibre Reinforced Polymer and Concrete Under Quasi Static and Impact Loading by :
Download or read book A Study of Bond Between Fibre Reinforced Polymer and Concrete Under Quasi Static and Impact Loading written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis examines the typical behavior of the interface bond between a selection of FRP treatments and various types of surface preparation on reinforced concrete beams under loading. It also describes an innovative specimen that enables examination of bond properties using a notched beam under a four-point bending test. The thesis also studies the bond between FRP and concrete under impact loading and discusses the strain rate sensitivity of the FRP- oncrete bond. Three surface treatment methods (water jetting, sandblasting, and jackhammering), two bonding agents (aromatic isocyanate (ATPRIME®) and vinyl ester), and three FRP systems (sprayed glass fiber reinforced polymer, sprayed carbon fiber reinforced polymer, and glass fiber reinforced polymer wrap) were investigated. The influences of FRP bond length, specimen notch depth, and a wide range of loading rates (creep, quasi-static loading, and impact loading) on bond behavior were also investigated. The notched beam specimen was also used to understand the debonding mechanism under impact loading. An impact setup was successfully developed to measure the bond stress and fracture energy of the FRP- oncrete bond. Bond strength values and toughness values were calculated for different surface treatments, FRP application methods, and bonding agents used. The FRP- oncrete bond strength was found to be a strain rate sensitive parameter that increases as the strain rate increases. A dynamic improvement factor (DIF) was defined to characterise the influence of different material and strain rate parameters on bond strength. A correlation was found to relate dynamic improvement factor to strain rate for different surface preparation types. An attempt was made to calibrate the energy and traction parameters of the cohesive element in ABAQUS to reproduce the same load displacement behavior as observed in the test from a modeled beam. Using different ABAQUS cohesive zone parameters, the load displacement behavior of the be.
Download or read book ACI Structural Journal written by and published by . This book was released on 1994 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
