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Behavior Of Externally Confined Circular High Strength Concrete Column Under Axial Cyclic Compression
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Book Synopsis Behavior of Externally Confined Circular High Strength Concrete Column Under Axial Cyclic Compression by : Chu Kiat Khor
Download or read book Behavior of Externally Confined Circular High Strength Concrete Column Under Axial Cyclic Compression written by Chu Kiat Khor and published by . This book was released on 2011 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behaviour of Externally Confined High Strength Concrete Column Under Uniaxial Cyclic Compression by : Hoong Pin Lee
Download or read book Behaviour of Externally Confined High Strength Concrete Column Under Uniaxial Cyclic Compression written by Hoong Pin Lee and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behaviour of Externally Confined High Strength Concrete Column Under Uniaxial Cyclic Compression by : Hoong Pin Lee
Download or read book Behaviour of Externally Confined High Strength Concrete Column Under Uniaxial Cyclic Compression written by Hoong Pin Lee and published by . This book was released on 2011 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book FRP written by J. G. Teng and published by John Wiley & Sons. This book was released on 2002 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fibre-reinforced polymer (FRP) composites are used to strengthen reinforced concrete (RC) structures. A large amount of research now exists on this. This book brings together all existing research into one volume.
Book Synopsis Development of Ultra-High Performance Concrete against Blasts by : Chengqing Wu
Download or read book Development of Ultra-High Performance Concrete against Blasts written by Chengqing Wu and published by Woodhead Publishing. This book was released on 2018-03-19 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Development of Ultra-High Performance Concrete against Blasts: From Materials to Structures presents a detailed overview of UHPC development and its related applications in an era of rising terrorism around the world. Chapters present case studies on the novel development of the new generation of UHPC with nano additives. Field blast test results on reinforced concrete columns made with UHPC and UHPC filled double-skin tubes columns are also presented and compiled, as is the residual load-carrying capacities of blast-damaged structural members and the exceptional performance of novel UHPC materials that illustrate its potential in protective structural design. As a notable representative, ultra-high performance concrete (UHPC) has now been widely investigated by government agencies and universities. UHPC inherits many positive aspects of ultra-high strength concrete (UHSC) and is equipped with improved ductility as a result of fiber addition. These features make it an ideal construction material for bridge decks, storage halls, thin-wall shell structures, and other infrastructure because of its protective properties against seismic, impact and blast loads. Focuses on the principles behind UHPC production, properties, design and detailing aspects Presents a series of case studies and filed blast tests on columns and slabs Focuses on applications and future developments
Book Synopsis ACI 440. 2R-17 Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures by : ACI Committee 440
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:
Book Synopsis Behavior of High Strength Concrete Columns Under Axial Load and Cyclic Flexure by : Dharmendra Vallabhbhai Shah
Download or read book Behavior of High Strength Concrete Columns Under Axial Load and Cyclic Flexure written by Dharmendra Vallabhbhai Shah and published by . This book was released on 1991 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Normal-strength and High-strength Concrete Columns Under Cyclic Axial Load and Biaxial Moment by : Mehdi Zarei
Download or read book Normal-strength and High-strength Concrete Columns Under Cyclic Axial Load and Biaxial Moment written by Mehdi Zarei and published by . This book was released on 2016 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: The technique of using Carbon Fiber Reinforced Polymer (CFRP) materials to repair and strengthen various concrete members has become popular in the structural retrofitting field as an effective way to enhance the strength and ductility of concrete members due to its superior mechanical properties. In this study a method was introduced to study the behavior of concrete columns with and without CFRP jackets under constant axial load and variable lateral load. The lateral load was applied monotonically and cyclically. To predict the behavior of concrete columns under monotonic and cyclic compressive loadings, a computer code was developed to produce the moment-curvature diagram for concrete sections. The moment-curvature diagram was then input in SAP2000 to study the behavior of reinforced concrete columns. The result of this analysis was found to correlate with experimental data well. The behavior of high-strength concrete (HSC) columns having various properties and subjected to a variety of loading conditions has been the topic of considerable investigation. Of particular significance in this area is the behavior of HSC columns under cyclic compressive load with bidirectional eccentricity. For the experimental investigation, tests of six square slender HSC columns were conducted under stroke control to achieve both ascending and descending branches of the load-deformation curves. Analysis of HSC columns subjected to cyclic axial compression with bidirectional eccentricity was approached from the standpoint of a three-dimensional problem. A computer program based on the extended finite segment method and accounting for geometrical nonlinearity has been proposed here to predict the load-deflection curves of HSC columns under cyclical loading. The HSC stress-strain relationship obtained by parametric study and experimental investigation into the behavior of concrete under cyclical load history has been incorporated into the numerical procedure. The presented computer analysis results have been compared with the experimental data, and a satisfactory agreement was attained for both the ascending and descending branches of the load-deformation curves.
Book Synopsis Strengthening of Reinforced Concrete Structures by : L C Hollaway
Download or read book Strengthening of Reinforced Concrete Structures written by L C Hollaway and published by Elsevier. This book was released on 1999-03-05 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: The in situ rehabilitation or upgrading of reinforced concrete members using bonded steel plates is an effective, convenient and economic method of improving structural performance. However, disadvantages inherent in the use of steel have stimulated research into the possibility of using fibre reinforced polymer (FRP) materials in its place, providing a non-corrosive, more versatile strengthening system. This book presents a detailed study of the flexural strengthening of reinforced and prestressed concrete members using fibre reinforces polymer composite plates. It is based to a large extent on material developed or provided by the consortium which studied the technology of plate bonding to upgrade structural units using carbon fibre / polymer composite materials. The research and trial tests were undertaken as part of the ROBUST project, one of several ventures in the UK Government's DTI-LINK Structural Composites Programme. The book has been designed for practising structural and civil engineers seeking to understand the principles and design technology of plate bonding, and for final year undergraduate and postgraduate engineers studying the principles of highway and bridge engineering and structural engineering. Detailed study of the flexural strengthening of reinforced and prestressed concrete members using fibre reinforced polymer composites Contains in-depth case histories
Book Synopsis Strengthening and Rehabilitation of Civil Infrastructures Using Fibre-Reinforced Polymer (FRP) Composites by : L C Hollaway
Download or read book Strengthening and Rehabilitation of Civil Infrastructures Using Fibre-Reinforced Polymer (FRP) Composites written by L C Hollaway and published by Elsevier. This book was released on 2008-07-18 with total page 415 pages. Available in PDF, EPUB and Kindle. Book excerpt: The repair of deteriorated, damaged and substandard civil infrastructures has become one of the most important issues for the civil engineer worldwide. This important book discusses the use of externally-bonded fibre-reinforced polymer (FRP) composites to strengthen, rehabilitate and retrofit civil engineering structures, covering such aspects as material behaviour, structural design and quality assurance. The first three chapters of the book review structurally-deficient civil engineering infrastructure, including concrete, metallic, masonry and timber structures. FRP composites used in rehabilitation and surface preparation of the component materials are also reviewed. The next four chapters deal with the design of FRP systems for the flexural and shear strengthening of reinforced concrete (RC) beams and the strengthening of RC columns. The following two chapters examine the strengthening of metallic and masonry structures with FRP composites. The last four chapters of the book are devoted to practical considerations in the flexural strengthening of beams with unstressed and prestressed FRP plates, durability of externally bonded FRP composite systems, quality assurance and control, maintenance, repair, and case studies. With its distinguished editors and international team of contributors, Strengthening and rehabilitation of civil infrastructures using fibre-reinforced polymer (FRP) composites is a valuable reference guide for engineers, scientists and technical personnel in civil and structural engineering working on the rehabilitation and strengthening of the civil infrastructure. Reviews the use of fibre-reinforced polymer (FRP) composites in structurally damaged and sub-standard civil engineering structures Examines the role and benefits of fibre-reinforced polymer (FRP) composites in different types of structures such as masonry and metallic strengthening Covers practical considerations including material behaviour, structural design and quality assurance
Author :fib Fédération internationale du béton Publisher :fib Fédération internationale du béton ISBN 13 :9782883940543 Total Pages :178 pages Book Rating :4.9/5 (45 download)
Book Synopsis Externally Bonded FRP Reinforcement for RC Structures by : fib Fédération internationale du béton
Download or read book Externally Bonded FRP Reinforcement for RC Structures written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2001-01-01 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: In December 1996, the then CEB established a Task Group with the main objective to elaborate design guidelines for the use of FRP reinforcement in accordance with the design format of the CEB-FIP Model Code and Eurocode2. With the merger of CEB and FIP into fib in 1998, this Task Group became fib TG 9.3 FRP Reinforcement for concrete structures in Commission 9 Reinforcing and Prestressing Materials and Systems. The Task Group consists of about 60 members, representing most European universities, research institutes and industrial companies working in the field of advanced composite reinforcement for concrete structures, as well as corresponding members from Canada, Japan and USA. Meetings are held twice a year and on the research level its work is supported by the EU TMR (European Union Training and Mobility of Researchers) Network "ConFibreCrete”. The work of fib TG 9.3 is performed by five working parties (WP): Material Testing and Characterization (MT&C) Reinforced Concrete (RC) Prestressed Concrete (PC) Externally Bonded Reinforcement (EBR) Marketing and Applications (M&A) This technical report constitutes the work conducted as of to date by the EBR party. This bulletin gives detailed design guidelines on the use of FRP EBR, the practical execution and the quality control, based on the current expertise and state-of-the-art knowledge of the task group members. It is regarded as a progress report since it is not the aim of this report to cover all aspects of RC strengthening with composites. Instead, it focuses on those aspects that form the majority of the design problems. several of the topics presented are subject of ongoing research and development, and the details of some modelling approaches may be subject to future revisions. as knowledge in this field is advancing rapidly, the work of the EBR WP will continue. Inspite of this limit in scope, considerable effort has been made to present a bulletin that is today’s state-of-art in the area of strengthening of concrete structures by means of externally bonded FRP reinforcement.
Book Synopsis Axial Behavior of High-strength Reinforced Concrete Circular Columns Confined with Spirals by : Lonnie A. Marvel
Download or read book Axial Behavior of High-strength Reinforced Concrete Circular Columns Confined with Spirals written by Lonnie A. Marvel and published by . This book was released on 2008 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Polymer Composites for Structural Applications in Construction by : L C Hollaway
Download or read book Advanced Polymer Composites for Structural Applications in Construction written by L C Hollaway and published by Elsevier. This book was released on 2004-04-22 with total page 785 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past three decades advanced polymer composites have emerged as an attractive construction material for new structures and the strengthening/rehabilitation of existing buildings and bridges. The techniques associated with the technology, analysis and design of polymer composites in construction are continually being researched and the progress made with this exciting material will continue at an ever- increasing rate to meet the demands of the construction industry. This volume of proceedings is from the Second ACIC 2004 International Conference, which focused on the application and further exploitation of advanced composites in construction. The conference allowed practising engineers, asset managers, researchers and representative of regulatory bodies to promote the active exchange of scientific and technical information on the rapidly changing scene of advanced composites in construction. This volume focuses on the presentation of new concepts, techniques and case studies, which will lead to greater exploitation of advanced polymer composites and FRP materials for civil engineering infrastructure, rehabilitation and renewal. Presents new concepts, techniques and case studies
Book Synopsis Behavior of Light Weight High Strength Concrete Columns Under Axial Load and Cyclic Flexure by : Sandeep Navinchandra Patel
Download or read book Behavior of Light Weight High Strength Concrete Columns Under Axial Load and Cyclic Flexure written by Sandeep Navinchandra Patel and published by . This book was released on 1992 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Confinement of Normal and High-strength Concrete Columns by : Salim R. Razvi
Download or read book Confinement of Normal and High-strength Concrete Columns written by Salim R. Razvi and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive research project was conducted to investigate the behaviour and design of earthquake resistant normal-strength and high-strength concrete columns. The project included three essential components; testing of full size columns, development of an analytical model, and development of a design procedure. The experimental program consisted of material research and structural testing. The first phase was designed to study mechanical properties of high-strength concrete, which involved testing of a large number of concrete cylinders. The second phase was designed to investigate performance of confined normal and high-strength concrete columns under concentric compression. The experimental program included tests of 46 full size square and circular columns, with concrete strength ranging between 60 MPa and 124 MPa. The parameters considered included; cross-sectional shape (circular and square), volumetric ratio and spacing of transverse reinforcement, distribution of longitudinal reinforcement and resulting tie arrangement, yield strength of transverse reinforcement, concrete compressive strength, influence of longitudinal reinforcement in circular columns, and type of circular reinforcement (continuous spiral and circular hoops). The analytical component of the research program involved development of a mathematical model to represent stress-strain relationship of confined concrete. This was done in two steps. The first step included formulation of the relationship for normal strength concrete, for which extensive test data was available. The second step involved modification of the model for high-strength concrete. An extensive literature survey was first conducted, followed by evaluation of previous test data. This information was used, along with the results of the experimental phase of this investigation to develop a generalized cofinement model for normal-strength and high-strength concrete columns. The analytical and experimental research was used in developing a design procedure for confinement of earthquake resistant concrete columns. The procedure includes all the relevant parameters of confinement that have been observed to be important in column tests, and relates the design variables to deformation capacities. A displacement based design methodology was developed, where the lateral drift demand is a design parameter. This approach leads to different confinement steel requirements for columns with different deformability demands, an approach currently lacking in practice. Furthermore, the reinforcement arrangement is recognized as a design parameter, allowing lower volumetric ratio of confinement reinforcement for efficient arrangements. This may result in significant savings in steel, eliminating the common problem of steel congestion in earthquake resistant columns. (Abstract shortened by UMI.).
Book Synopsis Behaviour of Cfst Columns with External Confinement Under Uni-Axial Compression by : Mianheng Lai
Download or read book Behaviour of Cfst Columns with External Confinement Under Uni-Axial Compression written by Mianheng Lai and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Behaviour of CFST Columns With External Confinement Under Uni-axial Compression" by Mianheng, Lai, 赖{273430}{27305f}, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: This thesis presents both experimental and theoretical studies on the structural behaviour of externally confined concrete-filled-steel-tube (CFST) short columns under uni-axial compression. External confinement in the form of tie bars, steel rings, spirals and jackets is proposed. From the study, it can be concluded that the external confinement is highly effective in improving the uni-axial behaviour of CFST columns by improving confining stress and suppressing inelastic local buckling. The first part of the thesis covers the experimental behaviour of concentrically loaded confined CFST columns. The experimental programme involved testing a total of 208 specimens that consisted of 46 hollow-steel-tube columns with or without external confinement and CFST columns: 28 unconfined, 25 tie-confined, 77 ring-confined, 24 spiral-confined and 8 jacket-confined columns. The test results are summarized and discussed. From analysing the obtained experimental results, a better understanding of the structural behaviours, such as steel-concrete interface bonding, stress state of steel tube, behaviour of core concrete of CFST columns can be obtained. Besides, the test results obtained are useful for deriving and verifying theoretical models in this study. In the second part of the thesis, a theoretical stress-strain model is proposed based on the obtained test results. This model is obtained through a four-step procedure. As the first crucial step, a new and accurate hoop strain equation is proposed and verified based on experimental results. Having validated the assumption of stress path independence of the core concrete in CFST columns under monotonic uni-axial compression, an actively confined concrete constitutive model is adopted to predict the axial stress-strain response of the core concrete. Next, with the aid of Generalized Hooke's Law and Prandtl-Reuss theory, the complicated stress-state of steel tube is accurately modelled. Lastly, by using the newly proposed hoop strain equation together with the interaction models among the core concrete, steel tube and external confinement, the uni-axial behaviours of CFST columns can be predicted. The validity of this model is subsequently verified with the author's and published experimental results of CFST columns and FRP-confined concrete. Finally, a parametric study using the proposed model is conducted in this thesis, involving a wide range of parameters, i.e. steel tube yield strength, concrete compressive strength, steel ratio (steel tube outer diameter / thickness) and external confinement (types and arrangements). From the parametric study, two sets of critical steel ratios based on two levels of ductility at different steel yield and concrete compressive strengths are established. Moreover, the maximum column strengths of CFST columns obtained from the model and previous experimental studies are compared with the design strengths calculated using different design codes and the results indicate that the design codes cannot give reasonably accurate predictions. Therefore, new design equations are proposed in this thesis to predict the maximum strength of the CFST columns. Subjects: Concrete-filled tubes
Book Synopsis Behavior of Circular Concrete Columns Reinforced with FRP Bars and Stirrups by : Mohammad Afifi
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.
