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Determination Of Acceptance Criteria For Prestressing Strand In Pre Tensioned Applications
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Book Synopsis Determination of Acceptance Criteria for Prestressing Strand in Pre-tensioned Applications by : Thomaida Polydorou
Download or read book Determination of Acceptance Criteria for Prestressing Strand in Pre-tensioned Applications written by Thomaida Polydorou and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ASTM recently adopted the Standard Test Method for Evaluating Bond of Seven-Wire Steel Prestressing Strand as ASTM A1081, a pull-out test procedure developed for verifying the ability of steel strands to bond to cementitious materials prior to their use as tensile reinforcement in prestressed concrete sections. The required by ASTM International precision and bias statement has not been developed for this test method. In addition, a minimum threshold value that will ensure only adequately bonding strand sources will be accepted has not yet been applied to ASTM A1081. The test method was developed after findings that prestressing steel strand sources of identical type and grade vary significantly as far as their bonding capacity. Bond is a crucial aspect of the prestressing force being transferred into the concrete, and insufficient bonding action can result in the prestressed concrete section lacking in capacity to sustain the loads that it was designed for. After an initial survey of the pull-out strength of North American Strand in mortar, three strands of differing pull-out strengths were selected for inclusion in further testing. A precision and bias statement for ASTM A1081 was developed by first performing ruggedness testing to determine how the results are affected by allowable variations in methods and materials, and followed by an inter-laboratory study to determine the reproducibility of the test method. Once the precision and bias statement for the standard test method was developed, the same strand sources were tested for their performance in concrete beams. Statistical analysis of the flexural beam testing data and correlation with the prestressing strand sources' ASTM A1081 test results was performed, and the industry was provided with minimum acceptance criteria for prestressing strand tested by ASTM A1081, along with recommendations regarding the standard test method and aspects of prestressed concrete design.
Book Synopsis Acceptance Tests for Surface Characteristics of Steel Strands in Prestressed Concrete by : A. E. N. Osborn
Download or read book Acceptance Tests for Surface Characteristics of Steel Strands in Prestressed Concrete written by A. E. N. Osborn and published by Transportation Research Board. This book was released on 2008 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides practical tests to identify and measure residues (e.g., rust, lubricants used in manufacturing processes, or corrosion inhibitors) on the surface of steel prestressing strands and to establish thresholds for residue types found to affect the strength of the strand's bond to concrete. Key products presented here are four test methods suitable for use in a quality assurance program for the manufacture of steel prestressing strand.
Book Synopsis Design of Prestressed Concrete to AS3600-2009 by : Raymond Ian Gilbert
Download or read book Design of Prestressed Concrete to AS3600-2009 written by Raymond Ian Gilbert and published by CRC Press. This book was released on 2016-02-17 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of structures in general, and prestressed concrete structures in particular, requires considerably more information than is contained in building codes. A sound understanding of structural behaviour at all stages of loading is essential. This textbook presents a detailed description and explanation of the behaviour of prestressed concret
Book Synopsis Transfer, Development, and Splice Length for Strand/reinforcement in High-strength Concrete by : Julio A. Ramirez
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.
Author :FIB – International Federation for Structural Concrete Publisher :FIB - International Federation for Structural Concrete ISBN 13 :0721010970 Total Pages :48 pages Book Rating :4.7/5 (21 download)
Book Synopsis Report on prestressed steel 2:anchorage and application of pretensioned 7-wire strands by : FIB – International Federation for Structural Concrete
Download or read book Report on prestressed steel 2:anchorage and application of pretensioned 7-wire strands written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 1978-06-01 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :FIB – International Federation for Structural Concrete Publisher :FIB - International Federation for Structural Concrete ISBN 13 :0907862039 Total Pages :22 pages Book Rating :4.9/5 (78 download)
Book Synopsis Report on prestressed steel 7:test for the determination of tendon transmission length under static conditions by : FIB – International Federation for Structural Concrete
Download or read book Report on prestressed steel 7:test for the determination of tendon transmission length under static conditions written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 1982-01-01 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation and Repair Procedures for Precast/prestressed Concrete Girders with Longitudinal Cracking in the Web by : Maher K. Tadros
Download or read book Evaluation and Repair Procedures for Precast/prestressed Concrete Girders with Longitudinal Cracking in the Web written by Maher K. Tadros and published by Transportation Research Board. This book was released on 2010 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report establishes a user's manual for the acceptance, repair, or rejection of precast/prestressed concrete girders with longitudinal web cracking. The report also proposes revisions to the AASHTO LRFD Bridge Design Specifications and provides recommendations to develop improved crack control reinforcement details for use in new girders. The material in this report will be of immediate interest to bridge engineers.
Download or read book Federal-aid Policy Guide written by and published by . This book was released on 1995 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis PCI Design Handbook by : Leslie D. Martin
Download or read book PCI Design Handbook written by Leslie D. Martin and published by . This book was released on 2004 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Sixth Edition provides easy-to-follow design procedures, newly formatted numerical examples, and both new and updated design aids using ASCE 7-02, ACI 318-02, the third edition of the AISC Steel Manual and IBC 2003. It also includes new and updated information on 15 foot wide double tee load tables, seismic design, torsion and shear design, load and resistance factors, headed stud connection design, and fire resistance.
Book Synopsis PRESTRESSED CONCRETE : ANALYSIS AND DESIGN PRACTICE OF MEMBERS by : KARUNA MOY GHOSH
Download or read book PRESTRESSED CONCRETE : ANALYSIS AND DESIGN PRACTICE OF MEMBERS written by KARUNA MOY GHOSH and published by PHI Learning Pvt. Ltd.. This book was released on 2014-01-01 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses an overall approach presenting comprehensive principles and description of the analysis and design of prestressed concrete members, from its initial design concepts, analysis, to the construction stage. The structural components are analyzed and designed to conform to the requirements of Eurocodes, [that are similar to Indian Standard Codes] followed throughout the world. In order to elaborate on the concept of prestressed concrete, seven different cases are dealt with in this book to add an analytical approach to the subject. The concepts explained are well-supported with the mathematical derivations and problem formulations. Illustrative figures and tables further help in making understanding of the concepts easier. The book serves as a reference for the undergraduate students of civil and structural engineering.
Download or read book Report written by and published by . This book was released on 2008 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Validation of Acceptance Criteria for the Bond of Prestressing Strands by : Youssef Ferzli
Download or read book Validation of Acceptance Criteria for the Bond of Prestressing Strands written by Youssef Ferzli and published by . This book was released on 2000 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transit Development in Rock Mechanics by : Meifeng Cai
Download or read book Transit Development in Rock Mechanics written by Meifeng Cai and published by CRC Press. This book was released on 2014-10-20 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transit Development in Rock Mechanics—Recognition, Thinking and Innovation contains 150 papers presented at the 3rd ISRM International Young Scholars’ Symposium on Rock Mechanics (8-10 November 2014, Xi’an, China). The volume focusses on the transitional development in rock mechanics research from surface to underground mining and from shallow to a deep rock excavations, and on the transition of knowledge, thinking and innovation from pioneers to the young generation. The contributions cover a wide range of topics: Field investigation and measurements Physical and mechanical properties of rocks Analysis and design methods for rock engineering Numerical and physical modeling Multi-fields coupling analysis methods Rock slope, tunnel and foundation engineering Monitoring and control of rock pressure in underground engineering Dynamic rock mechanics and blasting Support and reinforcement techniques for geotechnical engineering Prediction and control of artificial hazards with excavation in rock Transit Development in Rock Mechanics—Recognition, Thinking and Innovation will be invaluable to engineers and academics interested or involved in rock mechanics, geotechnical engieering, mine engineering and underground engineering. The Symposium was organized by the Commission on Education of International Society for Rock Mechanics and Xi’an University of Science and Technology, and sponsored by the International Society for Rock Mechanics (ISRM) and the Chinese Society for Rock Mechanics and Engineering (CSRME).
Author :United States. Bureau of Public Roads. Office of Research and Development Publisher : ISBN 13 : Total Pages :178 pages Book Rating :4.:/5 (3 download)
Book Synopsis Highway Research & Development Studies by : United States. Bureau of Public Roads. Office of Research and Development
Download or read book Highway Research & Development Studies written by United States. Bureau of Public Roads. Office of Research and Development and published by . This book was released on 1968 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PCI Design Handbook written by and published by . This book was released on 1999 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accompanying CD-ROM contains files that compliment the text.
Download or read book PCI Journal written by and published by . This book was released on 2009 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluating the Time-dependent Deformations and Bond Characteristics of a Self Consolidating Concrete Mix and the Implication for Pretensioned Bridge Applications by : Kyle H. Larson
Download or read book Evaluating the Time-dependent Deformations and Bond Characteristics of a Self Consolidating Concrete Mix and the Implication for Pretensioned Bridge Applications written by Kyle H. Larson and published by . This book was released on 2007 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of an extensive experimental program conducted to determine the material, bond characteristics, and time-dependent deformations of a proposed self-consolidating concrete (SCC) mixture for bridge girders are presented. This research program was completed in three phases. The first phase consisted of 15 full-scale, pretensioned SCC flexural specimens tested to evaluate their transfer and development lengths. These specimens included both single-strand and multiple-strand beams, as well as specimens designed to evaluate the so-called 'top-strand' effect. The top-strand specimens, with more than 20 inches of concrete below the strand, were tested to evaluate the current American Association of State Highway and Transportation Officials requirement of a 30% increase in the development length when the concrete below the strand is more than 12 inches. Strand end-slip measurements, used to estimate transfer lengths, indicated the proposed SCC mixture meets ACI and AASHTO requirements. In addition, flexural tests confirmed the proposed SCC mixture also meets current code requirements for development length. The second phase was to evaluate the elastic shortening, creep, and shrinkage properties of the proposed SCC mixture for bridge girders. Four bridge girders with an inverted-T profile were used to measure these time-dependent deformations. In two of the specimens, the strands were tensioned to 75% of the ultimate tensile strength, simulating a girder at service. Strands of the other two specimens were left untensioned to evaluate shrinkage effect of the concrete alone. The shrinkage was then subtracted from the fully tensioned specimens and elastic shortening and creep were isolated after relaxation losses were calculated from code expressions. In addition, the fully tensioned specimens were used to determine transfer lengths of the prestressing strand. The final phase of the program was to record strain measurements of the actual bridge girders used in the field. Elastic shortening, creep, and shrinkage prestress losses of the proposed SCC mixture were compared with current design equations. Instrumentation of seven pretensioned girders in a five-span bridge located in Cowley County, Kansas, was used to measure time-dependent deformations. Three of these girders utilized SCC, while the other four were cast with conventional concrete.
