Download or read book Investigation of Bond Behaviour Between GFRP Reinforcing Bars and Concrete Containing Seawater written by Mehran Parvizi and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There has been a growing concern of water scarcity in recent years as global water shortages are increasing. The concrete industry consumes about 2 billion tons of potable water annually. For this reason, seawater has drawn attention as a potential substitute for mixing and curing water for concrete if certain challenges can be addressed. One of the main problems associated with the use of seawater in concrete is the risk of corrosion of internal steel reinforcement. Fibre-reinforced polymer (FRP) bars have been shown to be a viable reinforcement alternative in aggressive environments due to their corrosion-resistant properties. Glass FRP (GFRP) bars, due to their acceptable mechanical properties and reasonable price, are currently the most widely used in industry. GFRP bars are manufactured with a variety of surface configurations having different bond performance in concrete, which influences structural behaviour in concrete flexural elements. Therefore, the viability of GFRP bars with sand coated and spiral deformations in seawater concrete is an important topic for research. In this study the bond behaviour is investigated using two different test methods: 1) pullout specimens, and 2) beam anchorage specimens. The results suggest that there is no significant difference between the short-term bond strength of GFRP bars in seawater concrete compared to normal concrete. Additional research is recommended to explore possible long-term issues.

Download or read book Investigation of Glass Fibre Reinforced Polymer Reinforcing Bars as Internal Reinforcement for Concrete Structures written by David Tse Chuen Johnson and published by . This book was released on 2009 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of the existing data shows that two areas of GFRP bar research among others are in need of investigation, the first being behaviour of GFRP bars at cold temperatures and the second being the behaviour of large diameter GFRP rods. Based on the results of experimental work performed, cold temperatures were found to have minimal effect on the mechanical properties of the GFRP bars tested. In addition, through beam testing, large 32mm diameter GFRP bars were found to not fail prematurely due to interlaminar shear failure. By evaluating the mechanical and durability properties of GFRP bars and behaviour of GFRP RC, it can be concluded that GFRP appears to be an adequate alternative reinforcement for concrete structures. Because of high strength, low stiffness and elastic behaviour of GFRP bars, issues of significant importance for reinforced concrete are bond development, influence of shear on member behaviour and member deformability.

Download or read book Bond of Reinforcement in Concrete written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2000-01-01 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In 1993, the CEB Commission 2 Material and Behavior Modelling established the Task Group 2.5 Bond Models. It's terms of reference were ... to write a state-of-art report concerning bond of reinforcement in concrete and later recommend how the knowledge could be applied in practice (Model Code like text proposal)... {This work} covers the first part ... the state-of-art report."--Pref.

Download or read book Advances in Mechatronics Manufacturing and Mechanical Engineering written by Muhammad Aizzat Zakaria and published by Springer Nature. This book was released on 2020-08-05 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights selected papers from the Mechanical Engineering track, with a focus on mechatronics and manufacturing, presented at the “Malaysian Technical Universities Conference on Engineering and Technology” (MUCET 2019). The conference brings together researchers and professionals in the fields of engineering, research and technology, providing a platform for future collaborations and the exchange of ideas.

Download or read book Experimental and Analytical Investigation of Bond slip Relationship Between Fiber Reinforced Polymers FRP Bars and Concrete written by Aniket Dilip Borwankar and published by . This book was released on 2004 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Investigation of Bond slip Relationship Between Fiber Reinforced Polymers FRP Bars and Concrete written by and published by . This book was released on 2003 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Fibre Reinforced Polymer Reinforced Concrete written by Marta Baena and published by LAP Lambert Academic Publishing. This book was released on 2012-06 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: The differences in mechanical and bond properties of Fiber Reinforced Polymers (FRP) bars when compared to those of traditional steel reinforcement for reinforced concrete (RC) structures may affect the cracking and deformability behaviour of FRP RC members. This study investigates the bond behaviour between FRP reinforcement and concrete through experimental and numerical analysis. Experimental results on pull-out tests and direct tension tests are presented and discussed. A general procedure, derived from a cracking analysis based on slip and bond stresses, is used to study the deformability of FRP RC elements under tension. The tension stiffening effect is included via experimental nonlinear bond-slip law obtained from a laboratory pull-out test. The comparison between experimental data and numerical predictions of the reinforcement strain profile along the reinforcing bar during a tensile test confirms that the bond-based model adequately reproduces the redistribution of stresses after crack formation. Because the numerical model is flexible enough to include any "user-defined" bond-slip law and variable materials' properties, a parametric study is conducted.

Download or read book Bond Behavior of Glass Fiber Reinforced Polymer GFRP Bars in Concrete written by Mohamad Saleh Abou Niaj and published by . This book was released on 2008 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the corrosion vulnerability of steel bars in aggressive environment, the need arises for a substitute material that would provide better serviceability p erformance. Consequently, the use of glass fiber reinforced polymer (GFRP) bars evolves as a viable alternative for conventional steel reinforcement. As a relat ively new material there are no enough research studies conducted on the strengt h and performance of GFRP reinforced in concrete and therefore experimental data is greatly needed. This proposed research concentrates on experimental evaluati on of the bond aspect between GFRP bars and concrete as being one of the most im portant aspects that control the structural performance and serviceability of re inforced concrete (RC) structures. Two types of bond failure will be evaluated, namely splitting and pullout modes. The experimental results will be used for va lidating the accuracy of available design expressions or generating new expressi ons of the development/splice strength of GFRP bars in tension.

Download or read book Investigation of Bond Microstructure and Post Fire Behavior of GFRP Reinforcement for Concrete written by Omid Gooranorimi and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Glass fiber reinforced polymer (GFRP) bars are emerging as concrete reinforcements especially in applications where corrosion resistance properties are required. This dissertation focuses on bond properties, microstructure and post-fire behavior of GFRP bars. First, the bond of three GFRP bars with different surface characteristics was investigated by performing pull-out tests. A parametric bond-slip relationship was proposed for the GFRP bar with sand coated surface. The parameters were found by performing sensitivity analysis. The proposed bond-slip law was employed in an FEM model to predict the failure mode. Additionally, the model was employed in a GFRP-RC slab to replace the unrealistic perfect-bond assumption and led to more accurate results. Next, the microstructural patterns of four different GFRP bars were investigated using SEM analysis. Each bar demonstrated a unique defect/void pattern due to experiencing different manufacturing process. In order to investigate the effect of microstructure on GFRP durability, two of the bars were exposed to accelerated conditioning in an alkaline solution. The difference in microstructural patterns significantly affected the GFRP durability-related properties. Finally, the post-fire behavior of two different GFRP bars was investigated. GFRP-RC slabs were exposed to standard fire tests while being loaded at the service load. After the cooling phase, the GFRP bars were extracted for investigation of their residual mechanical properties. GFRP bars maintained the mechanical properties and no microstructural degradation was observed. Additionally, a thermomechanical model was developed to predict the temperature distribution and investigate the effect of the fire on the structural response and concrete cracking.

Download or read book Investigation of Bond Properties of Glass Fibre Reinforced Polymer GFRP Bars in Concrete Under Direct Tension written by Lisa Marie Vint and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bond Behaviour of Fibre Reinforced Polymer FRP Rebars in Concrete written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, fibre reinforced polymer (FRP) rebars have been extensively used in construction instead of steel rebars due to their non-corrosive nature and high tensile strength. Bond between FRP rebars and concrete is a critical design parameter that controls the performance of reinforced concrete members at serviceability and ultimate limit states. In order to prevent a bond failure, an adequate anchorage length should be provided. The anchorage length is derived using a bond stress-slip () constitutive law. The objective of this study is to investigate the effect of different parameters such as the type of fibre, the rebar surface and the confinement provided by the transverse reinforcement on the bond behaviour of FRP rebars in concrete. Based on the analysis, a generalized bond stress-slip relationship will be developed and a new design equation for the required anchorage length of FRP rebar in concrete will be derived. A database was created on the bond stress-slip behaviour of FRP rebars in concrete from the available literature up to 2009. The data was statistically analyzed to investigate the effect of the different parameters on the bond performance of FRP rebars. It was observed that an increase in the confinement provided by the transverse reinforcement increased the bond strength of FRP rebars in concrete. This signifies that the presence of transverse reinforcement affects the bond behaviour of FRP rebars in concrete and hence, it should be taken into consideration while developing design equations for FRP rebars. Type of fibre and rebar surface does not affect the bond stress, but the latter affects the slip corresponding to the peak bond stress. Based on the results, a nonlinear regression analysis was performed to develop the bond stress-slip model for splitting mode of failure and a design equation for determining the development length of the FRP rebars in concrete was derived. The proposed development length equation can save about 10%-15% of the d.

Download or read book Reinforced Concrete with FRP Bars written by Antonio Nanni and published by CRC Press. This book was released on 2014-03-05 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion-resistant, electromagnetic transparent and lightweight fiber-reinforced polymers (FRPs) are accepted as valid alternatives to steel in concrete reinforcement. Reinforced Concrete with FRP Bars: Mechanics and Design, a technical guide based on the authors more than 30 years of collective experience, provides principles, algorithms, and pr

Download or read book Durability Study on the Bond Strength of Basalt Fiber Reinforced Polymer BFRP Bars written by Ahmed T. H. Altalmas and published by . This book was released on 2014 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In the last few decades, Fiber-Reinforced Polymers (FRP) bars have emerged as alternatives to conventional steel reinforcing bars to overcome the corrosion problem found in reinforced concrete structures. Numerous studies have been conducted in order to evaluate the bond between FRP bars and concrete. Recently, a new type of FRP bars made of basalt fibers (BFRP) has emerged as an alternative to conventional glass-made FRP (GFRP) bars. BFRP bars have not yet been considered in international design codes due to lack of research on their structural performance. This research investigates the bond durability of BFRP bars to concrete. BFRP bars with two different surfaces were used in this study namely: sand-coated and indented surfaces. The bond durability for the GFRP bars was also investigated for comparison purpose. The test parameters included the FRP bar material, the surface coating, the environmental exposure, and the exposure duration. More than 100 pullout specimens were prepared and exposed to different environmental conditions over three durations: 30, 60, and 90 days. The accelerated harsh exposures included acid, alkaline, ocean water, tap water, high temperature, and high temperature followed by ocean or tap water environments. At the end of each exposure, pullout specimens were tested to study the bond performance of all specimens in terms of their bond strength, bond-slip curves, adhesion stress, and failure modes and mechanisms. Unconditioned (control) specimens were also tested to measure the bond between the bars and the concrete. Effects of each environmental exposure on the bond performance of the specimens were discussed. In general, BFRP bars showed bond behavior comparable to that of its GFRP counterparts. The well-known Eligehausen, Popov, and Bertero (BPE) model that describes the ascending branch of the bond-slip relationship of conventional steel was assessed and calibrated for the unconditioned and conditioned BFRP and GFRP bars. Design values of the bond coefficient [alpha] that defines the behavior of the ascending branch were recommended for the investigated exposures."--Abstract.

Download or read book Guide for the Design and Construction of Concrete Reinforced with Fiber Reinforced Polymer Bars written by ACI Committee 440 and published by . This book was released on 2003 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Corrosion of Steel in Concrete Structures written by Amir Poursaee and published by Woodhead Publishing. This book was released on 2023-02-20 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Essential reading for researchers, practitioners, and engineers, this book covers not only all the important aspects in the field of corrosion of steel reinforced concrete but also discusses new topics and future trends. Theoretical concepts of corrosion of steel in concrete structures, the variety of reinforcing materials and concrete, including stainless steel and galvanized steel, measurements and evaluations, such as electrochemical techniques and acoustic emission, protection and maintenance methods, and modelling, latest developments, and future trends in the field are discussed. - Comprehensive coverage of the corrosion of steel bars in concrete, investigating the range of reinforcing materials, and types of concrete - Introduces the latest measuring methods, data collection, and advanced modeling techniques - Second edition covers a range of new, emerging topics such as the concept of chloride threshold value, concrete permeability and chloride diffusion, the role of steel microstructure, and innovations in corrosion detection devices

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.