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Shear Capacity Of Fiber Reinforced Concrete Under Pure Shear
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Book Synopsis Shear Capacity of Fiber-reinforced Concrete Under Pure Shear by : Ahmad M. Ishtewi
Download or read book Shear Capacity of Fiber-reinforced Concrete Under Pure Shear written by Ahmad M. Ishtewi and published by . This book was released on 2012 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete members with steel fibers generally increase the shear and torsional strength of concrete; however, supplementing or replacing the stirrups with steel fibers is still not an accepted practice. Previous studies documented many tests of steel fiber-reinforced concrete (SFRC) beams with and without stirrups that failed in shear. The results indicated that the shear span-depth ratio adversely affects the shear capacity. As part of this experimental study, the picture frame fixture was used to test 20 SFRC samples under in-plane pure shear loading. Samples included hooked, crimped and arched-crimped steel fibers with varying volume fractions. Models for SFRC beam shear strength were reexamined using the current test data. The evaluation indicated that the model developed by Ashour provided the most accurate estimates to account for fibers efficiency in contribution to shear strength. Furthermore, the hooked steel fibers were shown to be more efficient than crimped fibers, and further increase of fiber volume fraction beyond 1 percent of crimped fibers did not result in significant improvements in the shear strength.
Book Synopsis On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete by : Estefanía Cuenca
Download or read book On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete written by Estefanía Cuenca and published by Springer. This book was released on 2014-12-27 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book sheds light on the shear behavior of Fiber Reinforced Concrete (FRC) elements, presenting a thorough analysis of the most important studies in the field and highlighting their shortcomings and issues that have been neglected to date. Instead of proposing a new formula, which would add to an already long list, it instead focuses on existing design codes. Based on a comparison of experimental tests, it provides a thorough analysis of these codes, describing both their reliability and weaknesses. Among other issues, the book addresses the influence of flange size on shear, and the possible inclusion of the flange factor in design formulas. Moreover, it reports in detail on tests performed on beams made of concrete of different compressive strengths, and on fiber reinforcements to study the influence on shear, including size effects. Lastly, the book presents a thorough analysis of FRC hollow core slabs. In fact, although this is an area of great interest in the current research landscape, it remains largely unexplored due to the difficulties encountered in attempting to fit transverse reinforcement in these elements.
Book Synopsis Shear Behavior of Steel Fiber Reinforced Prestressed Concrete Beams Without Shear Reinforcement by : Jae-Sung Cho
Download or read book Shear Behavior of Steel Fiber Reinforced Prestressed Concrete Beams Without Shear Reinforcement written by Jae-Sung Cho and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The ACI 318-08 building code allows to use the steel fiber reinforcement as alternative shear reinforcement with satisfying certain criteria when a beam is required minimum shear reinforcement. However, this provision applies to a nonprestressed and prestressed concrete beam such that it could be conservative since the shear strength of prestressed concrete beam is generally enhanced due to the prestressing force. This is due partially to the fact that the provision has been accepted based on researches, mostly conducted in nonprestressed concrete beam. Most of experiments conducted for prestressed concrete beam in small scale tests, with a height of specimens were less than 10 in. A larger scale of experiment is required due to concerns of size effect. In addition, in order to evaluate the qualification of a Steel Fiber Reinforced Concrete (SFRC) mixture used for structural applications, such as increasing shear resistance, a material evaluation method is essential. Currently ASTM or ACI Committee 544 (Fiber-Reinforced Concrete) does not recommend any standardized test method for evaluating shear performance of a particular SFRC material. This study addresses the research gaps described above by testing large-scale Steel Fiber Reinforced Prestressed Concrete (SFRPC) beams as well as developing a simple laboratory test techniques. A total 13 simply-supported beams for large-scale test with a shear span to effective depth ratio of 3.0 and a height of 24 in. were subjected to monotonically-increased, concentrated load. The test parameters were mainly included compressive strength, volume fraction of steel fibers, compressive reinforcement ratio. The results of large-scale test showed that the use of hooked steel fibers in a volume fraction greater than or equal to 0.50% volume fraction of steel fibers (67 lb per cubic yard), which is less than requirement by ACI 318-08 (0.75%, 100 lb per cubic yard), led to substantial enhancement of shear behaviors including the first cracking, the ultimate, and ductility. High compressive strength of SFRC, greater than 9000 psi, which is higher than ACI 318-08 requirement (less than 6000 psi) could be used as well. However, there was no significant effect from compressive reinforcement ratio. A simply shear test method for SFRC was proposed in this study. The test apparatus is almost exactly the same as the conventional ASTM bending test with only minor modification, in addition, it could simulate a pure shear stress by adjusting loading and support positions. By introducing a proper reinforcement for bending stress, it was possible to evaluate shear performance of SFRC with clear and uncomplicated shear stress field in the critical section.
Book Synopsis Behaviour of Ultra High Performance Fibre Reinforced Concrete Subjected to Pure Shear by : Brittany Yap
Download or read book Behaviour of Ultra High Performance Fibre Reinforced Concrete Subjected to Pure Shear written by Brittany Yap and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent years have shown Ultra High-Performance Fibre-Reinforced Concrete (UHPFRC) to be applicable to practical design problems, including 100-metre length bridges being built without conventional shear reinforcement. Although UHPFRC is promising, its shear response is an area that requires more research. An experimental program consisting of five large-scale UHPFRC panel elements was completed to better understand the behaviour of UHPFRC under pure shear. The panels had varying amounts of conventional reinforcement and a constant 2% volume fraction of steel fibres. The panels cracked at lower stresses than their companion prisms. However, the panels demonstrated a strain-hardening response with a linear post-cracking stiffness and reached a peak shear stress of 8-10 MPa. At peak shear stress, fibres began to pull out along a single crack where strains localized, causing gradual degradation in strength. Finite element predictions captured the strength of the panels well but identified areas in which modelling could be improved.
Book Synopsis Deformation Capacity and Shear Strength of Fiber Reinforced Cement Composite Flexural Members Subjected to Displacement Reversals by : Praveen Chompreda
Download or read book Deformation Capacity and Shear Strength of Fiber Reinforced Cement Composite Flexural Members Subjected to Displacement Reversals written by Praveen Chompreda and published by . This book was released on 2005 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Applications of Fiber Reinforced Concrete by : Nemkumar Banthia
Download or read book Structural Applications of Fiber Reinforced Concrete written by Nemkumar Banthia and published by . This book was released on 1999 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of UHPC Structural Members subjected to Pure Torsion by : Mohammed Ismail
Download or read book Behavior of UHPC Structural Members subjected to Pure Torsion written by Mohammed Ismail and published by kassel university press GmbH. This book was released on 2015-01-01 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra High Performance Concrete (UHPC) is characterized by a very high compressive strength which may reach more than 200 MPa. The behavior of this material under tension and compression actions has been established to be very brittle in nature. Discontinuous fibers (normally steel fibers) are usually added to the UHPC mix to introduce ductility. In order to investigate the beneficial effects of using fiber reinforced UHPC in structural members subjected to torsion, a series of experimental tests on 17 UHPC beams subjected to pure torsion were carried out. The test beams consisted of plain UHPC beams, UHPC beams reinforced with steel fibers only, UHPC reinforced with steel fibers and different combinations of traditional longitudinal and transverse reinforcement. The plain UHPC beams showed very brittle behavior, whereas the UHPC beams with steel fibers only showed a post cracking ductile behavior. The addition of little steel fiber volume (e.g. 0.5 %) to the plain UHPC beams enhanced the ductility. The enhancement at the ultimate capacity amounts to about 20 %. Meanwhile, the steel fibers with 0.9 % by volume showed much enhanced ductility and a maximum enhancement of the torsional carrying capacity up to 32 %. The addition of moderate steel fiber volume (e.g. 0.9 %) to one type of traditional reinforcement (either longitudinal or transverse) accomplished an effective post cracking torsional carrying mechanism. The steel fibers shows a tendency to replace the missing type of traditional reinforcement, however this should be confirmed by more tests and by using higher steel fiber volumes. A series of experimental tests on fiber reinforced UHPC prisms to investigate the post cracking shear strength and stiffness of the used UHPC mix (e.g. M3Q) was conducted. The results of these tests revealed that this fine grained UHPC mix has a weak post cracking shear behavior. The results of these tests were used later in the Finite Element (F.E) model. An analytical model based on the well known thin-walled tube analogy was developed in order to estimate the torsional carrying capacity of beams under pure torsion having different combinations of steel fibers and traditional reinforcement. The comparison between the test and model results showed very good agreement for all cases. A finite element model based on calibrated small scale tests was developed using ATENA F.E. package to predict the full load-deformation behavior of the test beams. The predictions of the model show very good agreement with the test results.
Author :fib Fédération internationale du béton Publisher :fib Fédération internationale du béton ISBN 13 :2883940975 Total Pages :274 pages Book Rating :4.8/5 (839 download)
Book Synopsis Shear and Punching Shear in RC and FRC Elements by : fib Fédération internationale du béton
Download or read book Shear and Punching Shear in RC and FRC Elements written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2010-12-01 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: fib Bulletin 57 is a collection of contributions from a workshop on "Recent developments on shear and punching shear in RC and FRC elements", held in Salò, Italy, in October 2010. Shear is one of a few areas of research into fundamentals of the behaviour of concrete structures where contention remains amongst researchers. There is a continuing debate between researchers from a structures perspective and those from a materials or fracture mechanics perspective about the mechanisms that enable the force flow through a concrete member and across cracks. In 2009, a Working Group was formed within fib Task Group 4.2 "Ultimate Limit State Models" to harmonise different ideas about design procedures for shear and punching. An important outcome of this work was the ensuing discussions between experts and practitioners regarding the shear and punching provisions of the draft fib Model Code, which led to the organization of the Salò workshop. Invited experts in the field of shear and FRC gave 18 lectures at the workshop that was attended by 72 participants from 12 countries in 3 different continents. The contributions from this conference as compiled in this bulletin are believed to represent the best of the current state of knowledge. They certainly are of general interest to fib members and especially helpful in the finalization of the 2010 fibModel Code. It is hoped that this publication will stimulate further research in the field, to refine and harmonize the available analytical models and tools for shear and punching design.
Book Synopsis Shear in Reinforced Concrete by : ACI-ASCE Shear Committee
Download or read book Shear in Reinforced Concrete written by ACI-ASCE Shear Committee and published by . This book was released on 1974 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Investigation of Fiber Reinforced Concrete Beams by :
Download or read book Experimental Investigation of Fiber Reinforced Concrete Beams written by and published by . This book was released on 2015 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results showed that all three types of fibers increased the shear capacity of the beam specimens more than the beam reinforced with minimum shear reinforcement. Moreover, some of the fibers used could shift the type of failure from a pure shear failure to a combined flexural-shear or pure flexural failure.
Book Synopsis Fibre Reinforced Cementitious Composites by : Arnon Bentur
Download or read book Fibre Reinforced Cementitious Composites written by Arnon Bentur and published by CRC Press. This book was released on 2006-11-16 with total page 624 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
Author :Gaspar Kani Publisher :Deptartment of Civil Engineering, University of Toronto ISBN 13 : Total Pages :248 pages Book Rating :4.:/5 (89 download)
Book Synopsis Kani on Shear in Reinforced Concrete by : Gaspar Kani
Download or read book Kani on Shear in Reinforced Concrete written by Gaspar Kani and published by Deptartment of Civil Engineering, University of Toronto. This book was released on 1979 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fibre-reinforced Concretes for High-performance Structures by : Andreas Lampropoulos
Download or read book Fibre-reinforced Concretes for High-performance Structures written by Andreas Lampropoulos and published by Emerald Group Publishing. This book was released on 2024-01-22 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fibre-reinforced Concretes for High-performance Structures presents key information about the development, performance and design of fibre-reinforced concrete, ultra-high-performance fibre-reinforced concrete and geopolymer concrete, and critically analyses their key mechanical properties and durability characteristics.
Book Synopsis Structural Applications of Steel Fiber Reinforced Concrete Analysis and Design by : Abdeslam Reklaoui
Download or read book Structural Applications of Steel Fiber Reinforced Concrete Analysis and Design written by Abdeslam Reklaoui and published by . This book was released on 1988 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :fib - federation internationale du beton Publisher :John Wiley & Sons ISBN 13 :3433030618 Total Pages :434 pages Book Rating :4.4/5 (33 download)
Book Synopsis fib Model Code for Concrete Structures 2010 by : fib - federation internationale du beton
Download or read book fib Model Code for Concrete Structures 2010 written by fib - federation internationale du beton and published by John Wiley & Sons. This book was released on 2013-12-04 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Federation for Structural Concrete (fib) is a pre-normative organization. 'Pre-normative' implies pioneering work in codification. This work has now been realized with the fib Model Code 2010. The objectives of the fib Model Code 2010 are to serve as a basis for future codes for concrete structures, and present new developments with regard to concrete structures, structural materials and new ideas in order to achieve optimum behaviour. The fib Model Code 2010 is now the most comprehensive code on concrete structures, including their complete life cycle: conceptual design, dimensioning, construction, conservation and dismantlement. It is expected to become an important document for both national and international code committees, practitioners and researchers. The fib Model Code 2010 was produced during the last ten years through an exceptional effort by Joost Walraven (Convener; Delft University of Technology, The Netherlands), Agnieszka Bigaj-van Vliet (Technical Secretary; TNO Built Environment and Geosciences, The Netherlands) as well as experts out of 44 countries from five continents.
Book Synopsis ACI 318-19 Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19) by : ACI Committee 318
Download or read book ACI 318-19 Building Code Requirements for Structural Concrete (ACI 318-19) and Commentary (ACI 318R-19) written by ACI Committee 318 and published by . This book was released on 2019-05 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultra-High Performance Concrete UHPC by : Ekkehard Fehling
Download or read book Ultra-High Performance Concrete UHPC written by Ekkehard Fehling and published by John Wiley & Sons. This book was released on 2015-04-20 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected chapters from the German concrete yearbook are now being published in the new English "Beton-Kalender Series" for the benefit of an international audience. Since it was founded in 1906, the Ernst & Sohn "Beton-Kalender" has been supporting developments in reinforced and prestressed concrete. The aim was to publish a yearbook to reflect progress in "ferro-concrete" structures until - as the book's first editor, Fritz von Emperger (1862-1942), expressed it - the "tempestuous development" in this form of construction came to an end. However, the "Beton-Kalender" quickly became the chosen work of reference for civil and structural engineers, and apart from the years 1945-1950 has been published annually ever since. Ultra high performance concrete (UHPC) is a milestone in concrete technology and application. It permits the construction of both more slender and more durable concrete structures with a prolonged service life and thus improved sustainability. This book is a comprehensive overview of UHPC - from the principles behind its production and its mechanical properties to design and detailing aspects. The focus is on the material behaviour of steel fibre-reinforced UHPC. Numerical modelling and detailing of the connections with reinforced concrete elements are featured as well. Numerous examples worldwide - bridges, columns, facades and roofs - are the basis for additional explanations about the benefits of UHPC and how it helps to realise several architectural requirements. The authors are extensively involved in the testing, design, construction and monitoring of UHPC structures. What they provide here is therefore a unique synopsis of the state of the art with a view to practical applications.
