Download or read book Study of Bending of High Strength Reinforcing Bars written by I. Narrow and published by . This book was released on 1968 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Bending of High Strength Reinforcing Bars Literature Review and Survey of Problem written by I. Narrow and published by . This book was released on 1968 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents the results of a review of bending requirements for concrete reinforcing steel and a survey of Corps of Engineers projects to determine the nature and extent of bending failures during field fabrication of high strength reinforcing bars. Although use of high strength reinforcing steel is increasing rapidly very few bending studies of steel bars have been made, and standard bending details are essentially the same as for milder grades of steel. The field bending experience at Corps of Engineers projects has been satisfactory, and few failures have occurred when standard bending practices have been followed. Failures have occurred when bending radii were less than standard and when straightening and rebending of bars was required. The general indication is that current standard detailing practices provide satisfactory limits for bending of all grades of reinforcing steel. (Author).

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Bar Development and Tension Lap Splice of High strength Reinforcing Steel written by Cheska Espanol and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-strength reinforcing steel with yield strengths up to 100 ksi have been implemented in design code, but it is not common in practical bridge design. High-strength reinforcement bears opportunities for higher load-carrying capacity, reduced congestion, cost savings, and corrosion-resistance in bridge components. However, the serviceability and the validity of current code provisions shall be further investigated for state departments of transportation to apply this material in practice. In particular, bar development and tension lap splice provisions of high-strength reinforcement should be studied, and the serviceability performance in terms of crack control must be evaluated. There is limited data on the serviceability performance of beams with high-strength rebar using larger bar sizes. Therefore, the research team at the University of Texas aims to expand the database of beam-splice tests by conducting four-point bending tests on four specimens containing No. 11 bars for longitudinal reinforcement either in ASTM A615 Grade 60 or Grade 100 steel. Through the results, the effects of steel grade and the presence of a lap splice on strength and serviceability performance can be evaluated. Furthermore, design recommendations and conclusions on the applicability of current design code development length and lap splice provisions using high-strength reinforcing steel are drawn

Download or read book Setting Bar bending Requirements for High strength Steel Bars written by Stephen Zhao and published by . This book was released on 2016 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reinforcing steel industry is currently developing high-strength reinforcing bars with specified yield strengths of 80 and 100 ksi, due to increased demand for such grades in concrete construction. However, none of the higher steel grades are able to match the benchmark mechanical properties of grade 60 steel; with each high-strength variant diverging from benchmark behavior in different ways. There is concern that the less ductile higher grade reinforcing bars may fracture at the bends and may require larger bend diameters. Limited tests are available that investigate the relation between bend diameter and the ductility, or conversely the brittleness, of reinforcing bars at bends. No such tests exist for the newly developed high-strength reinforcement having yield strengths of 80 and 100 ksi. Bend/re-bend (or re-straightening) tests were conducted on grade 60 and higher grade reinforcing bars to investigate relations between bend diameters and bend performance. The tests were monitored using digital image correlation technology from which never-before recorded comparative measures were obtained. Test results indicated significant differences in bend performance between bars of varying grades, such that wider bend diameters may be necessary for certain higher grade bars.

Download or read book Bond Behavior of High Performance Reinforcing Bars for Concrete Structures written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bond between the concrete and the reinforcing steel is a major factor affecting the performance of reinforced concrete structures. Advances in material science led to the production of High Performance Steel that has enhanced corrosion resistance and higher strength compared to conventional Grade 60 steel. Such material can lead to more economical design reducing the material requirements for a particular project and expanding its life span. The objective of this research is to study the bond behavior of High Performance reinforcing bars for concrete structures and to evaluate the effect of different parameters believed to affect the bond characteristics. Twenty-two large scale reinforced concrete splice beams were constructed using No. 8 and No. 11 reinforcing bars, having different cross-sections with varying concrete compressive strengths and development lengths. The beams were tested using four point bending setup to provide a constant moment region over the splice zone. Test results indicate that stresses up 90 ksi can be achieved in the No. 8 bars and up to 70 ksi in the No. 11 bars without confinement; however, it is recommended to use transverse reinforcement to confine the High Performance bars in order to ensure ductility. These stresses can be evaluated at failure using a simple proposed equation. Test results were used to extend the current ACI Committee 408 equations to better predict the stresses in the High Performance Steel.

Download or read book Bending Fatigue of High yield Reinforcing Bars in Concrete written by and published by . This book was released on 1982 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Behavior of Concrete Bridges Reinforced with High Performance Steel Reinforcing Bars written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High-performance (HP) steel reinforcing bars are characterized by their high tensile strength and enhanced corrosion resistance in comparison to conventional ASTM A 615 Grade 60 steel. Use of HP steel in concrete bridges could lead to potential savings by reducing the amount of steel required based on its higher strength characteristics and expanding the service life of bridges due to its enhanced corrosion resistance. A commercially available steel know Micro-Composite Multi-Structural Formable (MMFX) steel which is conforming to ASTM A 1035, was selected for this study because of its high tensile strength and enhanced corrosion resistance. Comprehensive experimental and analytical programs were carried out to evaluate the mechanical properties of the HP steel bars, its bond characteristics, and the behavior of concrete bridge decks reinforced with HP steel. Research findings showed that HP steel used in this study exhibited much higher tensile strength than that of conventional Grade 60. In addition, the HP steel bars had much lower corrosion rate than Grade 60 bars. Bending HP steel bars reduce its ultimate strength and strain by 6 and 70 percent, respectively. However, when HP steel bent bars are bonded to concrete they develop their full stress-strain capacity. Bond test results indicated that a stress level up to 90 ksi can be developed in #8 HP steel bars without the use of transverse reinforcement. The use of transverse reinforcement increases the bond strength of HP steel reinforcing bars, consequently reaching stress levels in the bars up to 150 ksi. When possible, it is recommended to use a minimum amount of transverse reinforcement to confine spliced bars to ensure ductile behavior and provide warning prior to failure. Direct replacement of Grade 60 with HP steel bars in bridge decks is a conservative approach. However, reducing the amount of HP steel by 33 percent does not impair the ultimate-load carrying capacity or alter the serviceability behavior o.

Download or read book 2009 Report Card for America s Infrastructure written by American Society of Civil Engineers and published by ASCE Publications. This book was released on 2009-01-01 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: Details the rationale behind grades in 15 categories as announced by ASCE. This book presents an analysis of each category, an assessment of your state's status, case studies of successful projects, suggestions for actions you can take and ways you can get involved, and more.

Download or read book High Performance Structures and Materials VI written by Willy Patrick Wilde and published by WIT Press. This book was released on 2012 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: Containing the edited papers presented at the Sixth International Conference on High Performance Structures and Materials, High Performance Structures and Materials VI addresses the issues involved with advanced types of structures, particularly those based on new concepts or new materials. Contributions will highlight the latest developments in design, optimisation, manufacturing and experimentation in these areas.The use of novel materials and new structural concepts nowadays is not restricted to highly technical areas like aerospace, aeronautical applications or the automotive industry, but affects all engineering fields including those such as civil engineering and architecture. Most high performance structures require the development of a generation of new materials, which can more easily resist a range of external stimuli or react in a non-conventional manner.The book will cover such topics as: Composite materials and structures, Lightweight structures, Nanocomposites, High performance concretes, Concrete fibres, Automotive composites, Steel structures, Natural fibre composites, Timber structures, Material characterisation, Experiments and numerical analysis, Damage and fracture mechanics, Computational intelligence, Adaptable and mobile structures, Environmentally friendly structures.

Download or read book Analysis and Design of Steel and Composite Structures written by Qing Quan Liang and published by CRC Press. This book was released on 2014-10-21 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: Steel and composite steel–concrete structures are widely used in modern bridges, buildings, sport stadia, towers, and offshore structures. Analysis and Design of Steel and Composite Structures offers a comprehensive introduction to the analysis and design of both steel and composite structures. It describes the fundamental behavior of steel and composite members and structures, as well as the current design criteria and procedures given in Australian standards AS/NZS 1170, AS 4100, AS 2327.1, Eurocode 4, and AISC-LRFD specifications. Featuring numerous step-by-step examples that clearly illustrate the detailed analysis and design of steel and composite members and connections, this practical and easy-to-understand text: Covers plates, members, connections, beams, frames, slabs, columns, and beam-columns Considers bending, axial load, compression, tension, and design for strength and serviceability Incorporates the author’s latest research on composite members Analysis and Design of Steel and Composite Structures is an essential course textbook on steel and composite structures for undergraduate and graduate students of structural and civil engineering, and an indispensable resource for practising structural and civil engineers and academic researchers. It provides a sound understanding of the behavior of structural members and systems.

Download or read book Minerals Yearbook written by and published by . This book was released on 1962 with total page 1444 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book In depth Study Reports from the World Survey of Current Research and Development on Roads and Road Transport written by International Road Federation and published by . This book was released on 1973 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Ships and Offshore Structures XIX written by Carlos Guedes Soares and published by CRC Press. This book was released on 2015-09-03 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt: This three-volume work presents the proceedings from the 19th International Ship and Offshore Structures Congress held in Cascais, Portugal on 7th to 10th September 2015. The International Ship and Offshore Structures Congress (ISSC) is a forum for the exchange of information by experts undertaking and applying marine structural research.The aim of

Download or read book Ultra High Performance Concrete and High Performance Construction Materials written by Ekkehard Fehling and published by kassel university press GmbH. This book was released on 2016-03-01 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tubular Structures XIV written by Leroy Gardner and published by CRC Press. This book was released on 2012-08-24 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tubular Structures XIV contains the latest scientific and engineering developments in the field of tubular steel structures, as presented at the 14th International Symposium on Tubular Structures (ISTS14, Imperial College London, UK, 12-14 September 2012). The International Symposium on Tubular Structures (ISTS) has a long-standing reputation for b