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Author : Arjang Tavassoli
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (13 download)
Download or read book Behaviour of GFRP Reinforced Concrete Columns Under Combined Axial Load and Flexure written by Arjang Tavassoli and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mohammad Afifi
Publisher :
ISBN 13 :
Total Pages : 237 pages
Book Rating : 4.:/5 (89 download)
Download or read book Behavior of Circular Concrete Columns Reinforced with FRP Bars and Stirrups written by Mohammad Afifi and published by . This book was released on 2013 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: The behavior of concrete members reinforced with fiber reinforced polymer (FRP) bars has been the focus of many studies in recent years. Nowadays, several codes and design guidelines are available for the design of concrete structures reinforced with FRP bars under flexural and shear loads. Meanwhile, limited research work has been conducted to examine the axial behavior of reinforced concrete (RC) columns with FRP bars. Due to a lack of research investigating the axial behavior of FRP reinforced concrete columns, North American codes and design guidelines do not recommend using FRP bars as longitudinal reinforcement in columns to resist compressive stresses. This dissertation aims at evaluating the axial performance of RC compression members reinforced with glass FRP (GFRP) and carbon FRP (CFRP) bars and stirrups through experimental and analytical investigations. A total of twenty seven full scale circular RC specimens were fabricated and tested experimentally under concentric axial load. The 300 mm diameter columns were designed according to CAN/CSA S806-12 code requirements. The specimens were divided to three series; series I contains three reference columns; one plain concrete and 2 specimens reinforced with steel reinforcement. Series II contains 12 specimens internally reinforced with GFRP longitudinal bars and transverse GFRP stirrups, while series III includes specimens totally reinforced with CFRP reinforcement. The experimental tests were performed at the structural laboratory, Faculty of Engineering, University of Sherbrooke. The main objective of testing these specimens is to investigate the behavior of circular concrete columns reinforced with GFRP or CFRP longitudinal bars and transverse hoops or spirals reinforcement. Several parameters have been studied; type of reinforcement, longitudinal reinforcement ratio, the volumetric ratios, diameters, and spacing of spiral reinforcement, confinement configuration (spirals versus hoops), and lap length of hoops. The test results of the tested columns were presented and discussed in terms of axial load capacity, mode of failure, concrete, longitudinal, and transverse strains, ductility, load/stress-strain response, and concrete confinement strength through four journal papers presented in this dissertation. Based on the findings of experimental investigation, the GFRP and CFRP RC columns behaved similar to the columns reinforced with steel. It was found that, FRP bars were effective in resisting compression until after crushing of concrete, and contributed on average 8% and 13% of column capacity for GFRP and CFRP RC specimens, respectively. Also, the use of GFRP and CFRP spirals or hoops according to the provisions of CSA S806-12 yielded sufficient restraint against the buckling of the longitudinal FRP bars and provided good confinement of the concrete core in the post-peak stages. The axial deformability (ductility) and confinement efficiency can be better improved by using small FRP spirals with closer spacing rather than larger diameters with greater spacing. It was found that, ignoring the contribution of FRP longitudinal bars in the CAN/CSA S806-12 design equation underestimated the maximum capacity of the tested specimens. Based on this finding, the design equation is modified to accurately predict the ultimate load capacities of FRP RC columns. New factors [alpha][indice inférieur g] and [alpha][indice inférieur c] were introduced in the modified equation to account for the GFRP and CFRP bars compressive strength properties as a function in their ultimate tensile strength. On the other hand, proposed equations and confinement model were presented to predict the axial stress-strain behavior of FRP RC columns confined by FRP spirals or hoops. The model takes into account the effect of many parameters such as; type of reinforcement, longitudinal reinforcement ratio; transverse reinforcement configuration; and the volumetric ratio. The proposed model can be used to evaluate the confining pressure, confined concrete core stress, corresponding concrete strain, and stress-strain relationship. The results of analysis using the proposed confinement model were compared with experimental database of twenty four full-scale circular FRP RC columns. A good agreement has been obtained between the analytical and experimental results. Proposed equations to predict both strength and stress-strain behavior of confined columns by FRP reinforcements demonstrate good correlation with test data obtained from full-scale specimens.
Author : J.L. Clarke
Publisher : CRC Press
ISBN 13 : 0203487672
Total Pages : 216 pages
Book Rating : 4.2/5 (34 download)
Download or read book Alternative Materials for the Reinforcement and Prestressing of Concrete written by J.L. Clarke and published by CRC Press. This book was released on 2003-09-02 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of steel reinforcement in concrete is a major problem, with serious implications for structural integrity and durability particularly for bridges and marine structures. This new book provides a thorough overview of recent developments and applications in this area. It examines the durability, strength and suitability of alternative materials.
Author : Tzuoh-Jaw Wu
Publisher :
ISBN 13 :
Total Pages : 204 pages
Book Rating : 4.:/5 (256 download)
Download or read book Behavior of Slender High Strength Steel Fiber Reinforced Concrete Columns Under Combined Biaxial Bending and Axial Compression written by Tzuoh-Jaw Wu and published by . This book was released on 1990 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Arnon Bentur
Publisher : CRC Press
ISBN 13 : 0203088727
Total Pages : 625 pages
Book Rating : 4.2/5 (3 download)
Download or read book Fibre Reinforced Cementitious Composites, Second Edition written by Arnon Bentur and published by CRC Press. This book was released on 2006-11-22 with total page 625 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced cementitious composites can be designed to have outstanding combinations of strength (five to ten times that of conventional concrete) and energy absorption capacity (up to 1000 times that of plain concrete). This second edition brings together in one volume the latest research developments in this rapidly expanding area. The book is split into two parts. The first part is concerned with the mechanics of fibre reinforced brittle matrices and the implications for cementitious systems. In the second part the authors describe the various types of fibre-cement composites, discussing production processes, mechanical and physical properties, durability and applications. Two new chapters have been added, covering fibre specification and structural applications. Fibre Reinforced Cementitious Composites will be of great interest to practitioners involved in modern concrete technology and will also be of use to academics, researchers and graduate students.
Author : Luca Bertolini
Publisher : John Wiley & Sons
ISBN 13 : 3527651713
Total Pages : 389 pages
Book Rating : 4.5/5 (276 download)
Download or read book Corrosion of Steel in Concrete written by Luca Bertolini and published by John Wiley & Sons. This book was released on 2013-02-26 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steel-reinforced concrete is used ubiquitously as a building material due to its unique combination of the high compressive strength of concrete and the high tensile strength of steel. Therefore, reinforced concrete is an ideal composite material that is used for a wide range of applications in structural engineering such as buildings, bridges, tunnels, harbor quays, foundations, tanks and pipes. To ensure durability of these structures, however, measures must be taken to prevent, diagnose and, if necessary, repair damage to the material especially due to corrosion of the steel reinforcement. The book examines the different aspects of corrosion of steel in concrete, starting from basic and essential mechanisms of the phenomenon, moving up to practical consequences for designers, contractors and owners both for new and existing reinforced and prestressed concrete structures. It covers general aspects of corrosion and protection of reinforcement, forms of attack in the presence of carbonation and chlorides, problems of hydrogen embrittlement as well as techniques of diagnosis, monitoring and repair. This second edition updates the contents with recent findings on the different topics considered and bibliographic references, with particular attention to recent European standards. This book is a self-contained treatment for civil and construction engineers, material scientists, advanced students and architects concerned with the design and maintenance of reinforced concrete structures. Readers will benefit from the knowledge, tools, and methods needed to understand corrosion in reinforced concrete and how to prevent it or keep it within acceptable limits.
Author : ACI Committee 440
Publisher :
ISBN 13 : 9780870311185
Total Pages : 42 pages
Book Rating : 4.3/5 (111 download)
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:
Author : R.S. Ghosh
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (428 download)
Download or read book Behaviour of Slender Reinforced Concrete Columns Subjected to Bending and Axial Load written by R.S. Ghosh and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Antonio Nanni
Publisher : Elsevier Publishing Company
ISBN 13 :
Total Pages : 468 pages
Book Rating : 4.3/5 (91 download)
Download or read book Fiber-reinforced-plastic (FRP) Reinforcement for Concrete Structures written by Antonio Nanni and published by Elsevier Publishing Company. This book was released on 1993 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of fiber reinforced plastic (FRP) composites for prestressed and non-prestressed concrete reinforcement has developed into a technology with serious and substantial claims for the advancement of construction materials and methods. Research and development is now occurring worldwide. The 20 papers in this volume make a further contribution in advancing knowledge and acceptance of FRP composites for concrete reinforcement. The articles are divided into three parts. Part I introduces FRP reinforcement for concrete structures and describes general material properties and manufacturing meth.
Author : Zahra Kharal
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Download or read book Towards Understanding the Seismic Behaviour of GFRP Confined Concrete Columns written by Zahra Kharal and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conventional steel reinforced concrete (RC) structures are prone to corrosion, resulting in billions of dollars in damages globally annually. The use of glass-fibre reinforced polymer (GFRP) bars as internal reinforcement is a pre-emptive measure, which offers a feasible and cost-effective solution to building lasting sustainable infrastructure. Despite the many advantages of GFRP, design codes do not recommend its usage in columns primarily due to the lack of test data, especially under seismic loading. This study was undertaken to understand the seismic behaviour of concrete columns confined by GFRP transverse reinforcement. In the experimental program of this study, sixteen square columns with 305x305 mm cross-section and 1470 mm length were constructed and tested under simulated earthquake loading. Fourteen columns were reinforced with GFRP ties and steel longitudinal bars, while two columns contained GFRP ties and GFRP longitudinal bars. The results, in the form of shear vs. tip deflection and moment vs. curvature hysteresis, showed that GFRP ties can significantly enhance the seismic performance of RC columns. Test results also revealed that if appropriate confinement is provided, columns confined by GFRP ties have flexural strength, energy dissipation capacity, ductility and deformability level comparable to steel-RC columns and thus can be used effectively as primary lateral reinforcement. In the analytical phase of the study, an extensive database of FRP confined columns tested under concentric axial compression was compiled. The applicability of various existing confinement models towards the test data was investigated in detail. A new constitutive stress-strain relationship for FRP confined columns was proposed which captured the behaviour considerably better than the available models. A computation program was developed, utilizing the proposed confinement model, to conduct nonlinear analysis of GFRP confined columns subjected to simulated seismic loading. The program predicted the shear vs. tip deflection and moment vs. curvature envelope curves, and the ductility parameters with reasonable accuracy. Lastly, a critical evaluation of seismic design provisions for FRP confinement in CSA-S806 (2012) was carried out. The code provisions were found to be ambiguous and lacking in several aspects. Based on the available test results, modifications to the current code were suggested.
Author : Charles E. Vandevelde
Publisher :
ISBN 13 :
Total Pages : 294 pages
Book Rating : 4.:/5 (12 download)
Download or read book The Behavior of Long, Hinged End Reinforced Concrete Columns Under Sustained Axial Load and Biaxial Bending written by Charles E. Vandevelde and published by . This book was released on 1968 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dureseti Chidambarrao
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (12 download)
Download or read book Behavior of Channel-shaped Reinforced Concrete Columns Under Combined Biaxial Bending and Compression written by Dureseti Chidambarrao and published by . This book was released on 1983 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: He inelastic behavior of irregular shaped reinforced concrete columns has been a constant concern for a structural engineer, to design a safe and economic structure in modern buildings and bridge piers. The shape of the elements in a reinforced concrete structure may be used to optimize its structural strength, to make better use of the available space, to improve the aesthetic appearance of the structure, or to facilitate construction. Due to the locations of the columns, the shapes of the buildings and the nature of the applied loads, many columns are subject to combined biaxial bending and axial load. Seven 1/4 scale direct models of the short, tied columns with channel-shaped cross sections were constructed for the present investigation. All the specimens were tested and studied for their complete strength and deformation behavior under combined biaxial bending moments and axial compression, and were used to examine some of the variables involved such as relative eccentricities and loading variations. The end conditions are assumed to be pinned-ended. The experimental load-strain and biaxial moment-curvature curves have been compared with the analytical results of the strength and deformation for biaxially loaded channel-shaped column members, and a satisfactory agreement was obtained from zero up to the ultimate load condition. The above inelastic behavior of channel-shaped reinforced concrete columns has formed the basis of the redistribution of the moments and forces in a statically indeterminate structure, and these characteristics can also be found useful for the limit analysis and design of reinforced concrete structures.
Author : ACI Committee 440
Publisher :
ISBN 13 : 9781945487590
Total Pages : 110 pages
Book Rating : 4.4/5 (875 download)
Download or read book ACI 440. 2R-17 Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures written by ACI Committee 440 and published by . This book was released on 2017-04-27 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lawrence C. Bank
Publisher : John Wiley & Sons
ISBN 13 : 0471681261
Total Pages : 572 pages
Book Rating : 4.4/5 (716 download)
Download or read book Composites for Construction written by Lawrence C. Bank and published by John Wiley & Sons. This book was released on 2006-07-21 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first textbook on the design of FRP for structural engineering applications Composites for Construction is a one-of-a-kind guide to understanding fiber-reinforced polymers (FRP) and designing and retrofitting structures with FRP. Written and organized like traditional textbooks on steel, concrete, and wood design, it demystifies FRP composites and demonstrates how both new and retrofit construction projects can especially benefit from these materials, such as offshore and waterfront structures, bridges, parking garages, cooling towers, and industrial buildings. The code-based design guidelines featured in this book allow for demonstrated applications to immediately be implemented in the real world. Covered codes and design guidelines include ACI 440, ASCE Structural Plastics Design Manual, EUROCOMP Design Code, AASHTO Specifications, and manufacturer-published design guides. Procedures are provided to the structural designer on how to use this combination of code-like documents to design with FRP profiles. In four convenient sections, Composites for Construction covers: * An introduction to FRP applications, products and properties, and to the methods of obtaining the characteristic properties of FRP materials for use in structural design * The design of concrete structural members reinforced with FRP reinforcing bars * Design of FRP strengthening systems such as strips, sheets, and fabrics for upgrading the strength and ductility of reinforced concrete structural members * The design of trusses and frames made entirely of FRP structural profiles produced by the pultrusion process
Author : Mu'taz Almomani
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)
Download or read book Performance Evaluation of High-strength Concrete Circular Columns Reinforced with GFRP Bars and Spirals written by Mu'taz Almomani and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of fifteen large-scale high-strength concrete (HSC) columns internally reinforced with GFRP bars and spirals are presented in this thesis. The concrete dimensions and reinforcement of the columns satisfied all the minimum requirements of the relevant Canadian standards. The test parameters in this study include reinforcement type (steel or GFRP), spiral pitch (50 or 85 mm), slenderness ratio (14, 20 or 28), the level of axial load eccentricity (60, 90, 120 or 150 mm) and the loading type (axial or flexural loading). The experimental results were then compared to the predictions of the Canadian and American FRP design codes and guidelines. Compared to the GFRP-reinforced concrete (RC) counterpart, the steel-RC specimen achieved a higher axial capacity (7.8%) with very similar behaviour up to the peak load but a more ductile post-peak behaviour. Both spiral pitches were able to provide adequate confinement up to the peak load, however, the smaller pitch was able to provide a more deformable post-peak behaviour. As the slenderness ratio increased, the lateral displacement increased and the lateral and axial stiffness decreased. The effect of increasing axial load eccentricity was more pronounced than the increase in slenderness ratio and resulted in reduced axial and lateral stiffness. The GFRP reinforcement was able to contribute to the carrying load capacity of both the axially-loaded columns and those under flexure. No failure of any bars or spirals was observed with the exception of the shortest column under the least eccentricity. Under flexural loading, the spirals were able to provide adequate confinement at different loading stages until failure. When compared with the experimental results, the examined codes and guidelines were found to be conservative in predicting the capacities of the columns for all loading conditions and slenderness ratios.
Author : Wing-Cheung Chan
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (871 download)
Download or read book Combined Axial Load-bending Moment Behaviour of Reinforced Concrete Short Columns written by Wing-Cheung Chan and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Chan, Wing-Cheung
Publisher : 1972 [c1973]
ISBN 13 :
Total Pages : 454 pages
Book Rating : 4.:/5 (871 download)
Download or read book Combined Axial Load-bending Moment Behaviour of Reinforced Concrete Short Columns written by Chan, Wing-Cheung and published by 1972 [c1973]. This book was released on 1972 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
