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Book Effect of Transverse Reinforcement on Bond Strength of Reinfocement in Silica Fume Concrete

Download or read book Effect of Transverse Reinforcement on Bond Strength of Reinfocement in Silica Fume Concrete written by Mahmoud Farouk Machaka and published by . This book was released on 1997 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of silica fume has been steadily increasing all over the world as designers utilize the resulting high performance concrete (HPC) to increase the concrete compressive strength and to reduce or eliminate durability problems such as sulfate attack and corrosion. Very few researchers investigated the effect of silica fume on bond-slip characteristics of deformed bars in high performance concrete. Researchers who worked on this topic like Itani and Azizinamini, concluded that the presence of silica fume reduced the bond strength and induced a brittle mode of failure. They suggested the use of transverse reinforcement over the splice region in order to increase the bond strength and provide a ductile mode of failure. The objectives of the proposed research program were to investigate the effect of transverse reinforcement on the bond-slip characteristics of tension lap splices in high performance silica fume concrete, to study the validity of the upper limit of 70 MPa (10,000 psi) imposed by the ACI Building Code 318-95 on the concrete compressive strength for determination of development length, and to evaluate the reliability of the empirical equation of Orangun, Jirsa, and Breen in estimating the bond strength of deformed bars embedded in high strength concrete. Twelve beam specimens were tested. Each beam specimen included two bars in tension, spliced at the center of the span. The beams were designed in way that bars would fail in bond, splitting the concrete cover in the splice region, before reaching the yield point. The beams were loaded in positive bending with the splice in a constant moment region. The variables used were the percentage replacement by weight of cement by silica fume and the amount of confinement over the splice region. Test results indicated that silica fume decreased the bond strength and that specimens containing silica fume but without any transverse reinforcement in the splice region had a brittle, sudden and noisy mode of failure. The use of transverse reinforcement in the splice region increased the bond strength and the ductility of the mode of failure of the beam specimens. Minimum amounts of transverse reinforcement were recommended.

Book Masters Theses in the Pure and Applied Sciences

Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 38 (thesis year 1993) a total of 13,787 thesis titles from 22 Canadian and 164 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 38 reports theses submitted in 1993, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.

Book Bond and anchorage of embedded reinforcement Background to the fib Model Code for Concrete Structures 2010

Download or read book Bond and anchorage of embedded reinforcement Background to the fib Model Code for Concrete Structures 2010 written by fib - Fédération internationale du béton and published by fib - Fédération internationale du béton. This book was released on 2014-05-01 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of the preparation for the fib Model Code for Concrete Structures 2010, task group 4.5 Bond Models undertook a major review of rules for bond and anchorage of reinforcement in the CEB-FIP Model Code 1990. This bulletin presents the outcome of that review, describes the rationale for the revisions and presents the evidence on which the revisions are based. The principle changes in MC2010 include raising the limit on concrete strength that may be used when determining bond resistance to 110MPa, introduction of a coefficient η4 to cater for different reinforcement Classes, and coverage of new construction materials including epoxy coated and headed bars. The format of design rules has been changed to permit more rational treatment of confinement from concrete cover and transverse reinforcement, the contribution of end hooks and bends for tension bars, and end bearing to compression laps. New guidance is provided covering a range of construction techniques and service environments and the influence of long term degradation. Analyses of various aspects of detailing on performance of laps and anchorages have resulted in discontinuation of the ‘proportion lapped’ factor α6, alterations to requirements of transverse reinforcement at laps, and have resolved inconsistencies in provisions for bundled bars between major national codes. Apparent inconsistencies in existing rules for lapped joints and anchorages and between the local bond/slip model and design rules are also resolved, thus allowing integration of application rules and modelling. Finally, the basis for an attempt to introduce simple detailing rules for laps and anchorages is described.

Book Bond of Reinforcement in Concrete

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.

Book Cement Based Composites

Download or read book Cement Based Composites written by Pawel Sikora and published by MDPI. This book was released on 2021-02-17 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue on “Cement-Based Composites: Advancements in Development and Characterization” presents the latest research and advances in the field of cement-based composites. This Special Issue covers a variety of experimental studies related to fiber-reinforced, photocatalytic, lightweight, and sustainable cement-based composites. Moreover, simulation studies are presented in this Special Issue to provide fundamental knowledge of designing and optimizing the properties of cementitious composites. The presented publications in this Special Issue show the most recent technology in the cement-based composite field.

Book fib Model Code for Concrete Structures 2010

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 Transfer Development and Splice Length for Strand reinforcement in High strength Concrete

Download or read book Transfer Development and Splice Length for Strand reinforcement in High strength Concrete written by Julio A. Ramirez and published by Transportation Research Board. This book was released on 2008 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report documents research performed to develop recommended revisions to the AASHTO LRFD Bridge Design Specifications to extend the applicability of the transfer, development, and splice length provisions for prestressed and non-prestressed concrete members to concrete strengths greater than 10 ksi. The report details the research performed and includes recommended revisions to the AASHTO LRFD Bridge Design Specifications. The material in this report will be of immediate interest to bridge designers."--Foreword.

Book Applied Mechanics Reviews

Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1994 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book ACI Materials Journal

Download or read book ACI Materials Journal written by and published by . This book was released on 1998 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book PRO 39 6th International RILEM Symposium on Fibre Reinforced Concretes FRC BEFIB 2004 Volume 1

Download or read book PRO 39 6th International RILEM Symposium on Fibre Reinforced Concretes FRC BEFIB 2004 Volume 1 written by Marco Di Prisco and published by RILEM Publications. This book was released on 2004 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Effects of Cover Concrete and Longitudinal Bar Size on the Bond Strength of Reinforcing Bars Embedded in High Strength Concrete

Download or read book The Effects of Cover Concrete and Longitudinal Bar Size on the Bond Strength of Reinforcing Bars Embedded in High Strength Concrete written by Erleen Kay Hatfield and published by . This book was released on 1996 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book ACI Structural Journal

Download or read book ACI Structural Journal written by and published by . This book was released on 2009 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book BOND STRENGTH CHARACTERISTICS OF DEFORMED REINFORCING STEEL BARS EMBEDDED IN SIFCON STEEL BARS CONCRETE

Download or read book BOND STRENGTH CHARACTERISTICS OF DEFORMED REINFORCING STEEL BARS EMBEDDED IN SIFCON STEEL BARS CONCRETE written by ALI MORSI HAMZA and published by . This book was released on 1992 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: monitored and the modes of bond failure were determined.