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Author : Sung-Yong Yu
Publisher :
ISBN 13 :
Total Pages : 314 pages
Book Rating : 4.:/5 (298 download)
Download or read book Characteristic Bond Behavior of Prestressing Strands Within the Transfer Length written by Sung-Yong Yu and published by . This book was released on 1993 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gabriel Alcaraz Emmanuelli
Publisher :
ISBN 13 : 9780530004167
Total Pages : 268 pages
Book Rating : 4.0/5 (41 download)
Download or read book Effect of Strand Diameter on Bond Transfer and Development Length Performance of Prestressing Strands written by Gabriel Alcaraz Emmanuelli and published by . This book was released on 2019-05-31 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: TRANSFER AND DEVELOPMENT LENGTH BEHAVIOR OF PRESTRESSING STRANDS. NEW EQUATION TO ESTIMATE TRANSFER AND DEVELOPMENT LENGTH OF PRESTRESSING STRANDS ON CONCRETE IS PROPOSED. Dissertation Discovery Company and University of Florida are dedicated to making scholarly works more discoverable and accessible throughout the world. This dissertation, "Effect of Strand Diameter on Bond Transfer and Development Length Performance of Prestressing Strands" by Gabriel Domingo Alcaraz Emmanuelli, was obtained from University of Florida and is being sold with permission from the author. A digital copy of this work may also be found in the university's institutional repository, IR@UF. 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.
Author : Matthew Lukas Arnold
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (847 download)
Download or read book Un-tensioned Pullout Tests to Predict the Bond Quality of Different Prestressing Reinforcements Used in Concrete Railroad Ties written by Matthew Lukas Arnold and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental testing program was conducted at Kansas State University (KSU) to test the bond characteristics of various 5.32-mm-diameter steel wires and smaller diameter (less than 0.5 in.) strands used in prestressed concrete railroad ties. A total of 13 wires and six strands produced by seven different steel manufacturers were used during this testing. Since no wire bond pullout test currently exists, one was developed and its validity tested. This un-tensioned pullout test could serve as a quality control test similar to the standard test for strand bond (ASTM A1081) that has been developed for pretensioned strands. This strand test is currently not verified for strands less than 0.5-in. in diameter, so the procedure was also scrutinized using strands common in the concrete railroad tie industry. Some of the wires and strands contained surface indentations. It is generally accepted that indentations in the reinforcements improve the bond between the steel and concrete. To further complicate the issue, reinforcements with different surface conditions (rust, oils, lubricants) are allowed to be used in the concrete ties which further affects the bond quality of the reinforcements. However, no standardized indentation patterns (shape, size, depth of indent, etc.) or surface conditions (degree of rusting, amount of surface lubricants, etc.) are utilized by all wire and strand manufacturers. Thus, the corresponding bond behavior of these different reinforcements when placed in various concrete mixtures, in terms of average transfer lengths and typical variations, is essentially unknown. The purpose of this testing program was to develop (in the case of wires) or verify/develop (in the case of strands) a pullout testing procedure predictive of the reinforcement's bond performance in a prestressed application. The test should be relatively inexpensive, demonstrably repeatable, and easily reproducible. Results from the un-tensioned pullout tests were compared to transfer length measurements from accompanying pretensioned concrete prisms in the lab. Additionally, pullout tests and transfer length measurements were obtained at an actual concrete railroad tie manufacturing plant. The obtained data was compared to the lab data and analyzed to further understand the relationship between un-tensioned pullout tests and pretensioned concrete members.
Author : C. Dale Buckner
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.:/5 (1 download)
Download or read book An Analysis of Transfer and Development Lengths for Pretensioned Concrete Structures written by C. Dale Buckner and published by . This book was released on 1994 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The specific objectives of the present study were as follows: (1) Conduct a review of literature related to strand transfer and development length research; (2) Analyze data from recent studies and rationalize discrepancies among conclusions drawn from these studies; and (3) Recommend design criteria for strand transfer and development lengths consistent with the current state of knowledge. These objectives were fulfilled. Recommendations and equations for determining strand transfer and development lengths are presented.
Author : A. E. N. Osborn
Publisher : Transportation Research Board
ISBN 13 : 0309117615
Total Pages : 141 pages
Book Rating : 4.3/5 (91 download)
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.
Author : Julio A. Ramirez
Publisher : Transportation Research Board
ISBN 13 : 030911747X
Total Pages : 131 pages
Book Rating : 4.3/5 (91 download)
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 : Lei Wang
Publisher : Springer Nature
ISBN 13 : 981992054X
Total Pages : 261 pages
Book Rating : 4.8/5 (199 download)
Download or read book Strand Corrosion in Prestressed Concrete Structures written by Lei Wang and published by Springer Nature. This book was released on 2023-08-23 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is an open access book. This book focuses on the durability problems of existing prestressed concrete (PC) structures caused by strand corrosion, clarifies the mechanical behavior of corroded prestressing strands, corrosion-induced cracking, bond degradation, prestress loss and structural performance deterioration, and proposes the corresponding prediction models. Its aim is to provide the knowledge, tools, and methods to understand the deterioration phenomena of PC structures. We hope that this text may be useful for those who work in the field of civil engineering. It is suitable for teachers and students majoring in civil engineering in universities, and researchers in the field of civil engineering. It is also suitable for practitioners of design institutes, construction units, supervising units and traffic management departments.
Author : Shizuo Ban
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (653 download)
Download or read book Study on Bond Characteristics of 7-wire Strand at Prestress Transfer written by Shizuo Ban and published by . This book was released on 1960 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 744 pages
Book Rating : 4.:/5 (318 download)
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:
Author : Krista Beth Porterfield
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (828 download)
Download or read book Bond, Transfer Length, and Development Length of Prestressing Strand in Self-consolidating Concrete written by Krista Beth Porterfield and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Due to its economic advantages, the use of self-consolidating concrete (SCC) has increased rapidly in recent years. However, because SCC mixes typically have decreased amounts of coarse aggregate and high amounts of admixtures, industry members have expressed concerns that the bond of prestressing strand in SCC may be compromised. While the bond performance of prestressing strand in a new material such as SCC is an important topic requiring investigation, the results are only applicable if the research is completed on strands with similar bond quality as the strands used in the field. Therefore, the objectives of this research program were to investigate the transfer and development lengths of prestressing strand in SCC and also evaluate the effectiveness of two proposed bond tests in determining acceptable bond quality of strand. Transfer and development lengths of 0.5-in. diameter (12.5 mm), Grade 270 prestressing strand were evaluated using rectangular beams constructed from normal and high strength conventional concrete and SCC mixes. End slips at release and strain readings over 28 days were used to calculate transfer lengths, and development lengths were evaluated through four-point loading at varying embedment lengths. Additionally, the NASP bond test and Large Block Pullout Tests (LBPT) were evaluated with strand from three different sources to determine if one test could be considered more reliable at predicting acceptable bond. Results indicated that bond performance of SCC and conventional concrete were comparable, and that AASHTO and ACI equations for transfer and development length were generally conservative. The NASP bond test and LBPT were found to be equally valid, but the acceptance limits for both tests appear to require revisions"--Abstract, leaf iii
Author : Chad S. Mitchell
Publisher :
ISBN 13 : 9780549743668
Total Pages : 141 pages
Book Rating : 4.7/5 (436 download)
Download or read book A Review of Initial End Slip as Criteria of Acceptable Strand Bond Quality and the Relationship Between Strand Diameter and Transfer Length for Prestressed Concrete Members written by Chad S. Mitchell and published by . This book was released on 2008 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt: ACI 318-05 section 12.9.1 defines a minimum development length for which a prestressing strand shall be bonded. This is "intended to provide bond integrity for the strength of the member." ACI 318-05 equation 12-4 was adopted in 1963 and was based on empirical results of physical tests. In the past 40 years there have been many advances in pretension strand materials and yet equation 12-4 has not changed other than minor clerical modifications. There have been several studies to predict transfer and flexural bond lengths in prestressed concrete that determined that equation 12-4 is limited and in some cases underestimates these transfer and development lengths. This thesis is three-part: determine through a literature review of previous studies the applicability of end slip as a criteria of acceptable bond and the validity of equation 12-4, categorize techniques used to determine bond quality, and study the effects of strand diameter and effective prestress on the transfer length through a finite element analysis of a simplified model.
Author : fib Fédération internationale du béton
Publisher : fib Fédération internationale du béton
ISBN 13 : 9782883940505
Total Pages : 448 pages
Book Rating : 4.9/5 (45 download)
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.
Author : M Y H Bangash
Publisher : Thomas Telford
ISBN 13 : 9780727729460
Total Pages : 940 pages
Book Rating : 4.7/5 (294 download)
Download or read book Manual of Numerical Methods in Concrete written by M Y H Bangash and published by Thomas Telford. This book was released on 2001-07-27 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manual of numerical methods in concrete aims to present a unified approach for the available mathematical models of concrete, linking them to finite element analysis and to computer programs in which special provisions are made for concrete plasticity, cracking and crushing with and without concrete aggregate interlocking. Creep, temperature, and shrinkage formulations are included and geared to various concrete constitutive models.
Author : Insert Name Here
Publisher : kassel university press GmbH
ISBN 13 : 3862192644
Total Pages : 1059 pages
Book Rating : 4.8/5 (621 download)
Download or read book Ultra-High Performance Concrete and Nanotechnology in Construction. Proceedings of Hipermat 2012. 3rd International Symposium on UHPC and Nanotechnology for High Performance Construction Materials written by Insert Name Here and published by kassel university press GmbH. This book was released on 2012-01-01 with total page 1059 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph Robert Holste
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (881 download)
Download or read book Experimental Determination of Prestressing Wire Bond and Splitting Propensity Characteristics Through Tensioned Pullout Tests written by Joseph Robert Holste and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation describes a testing program to evaluate the bond and splitting propensity characteristics of 5.32-mm-diameter prestressing wires. Prestressing wire reinforcement is used primarily in the production of prestressed concrete railroad ties. Twelve different 5.32-mm-diameter wires were tested in this study in order to measure bonding characteristics of the reinforcement. Establishment of the bond-slip characteristics of these reinforcement at both transfer of prestress (transfer bond) and under flexural loading (flexural bond) is necessary to enable the accurate modeling of these ties using finite elements. Transfer bond and flexure bond of various indent patterns were tested using tensioned pullouts. Specimens of various sizes with single or multiple wires were tested to determine the effects of cover and wire number on bond. Indents were machined on smooth prestressing wires to accurately compare indent geometries. Lateral expansion was tested to determine which wires have higher propensity to cause cracking or splitting. Crossties were instrumented to compare resulting lateral expansion with results found in the laboratory. The results from the testing program showed that the tensioned pullout test was able to be used to predict the transfer length of prisms made with the same reinforcement. The results also showed that the indent geometries were able to be used to predict the splitting of specimens based on the amount of slip the wire had experienced. The testing also showed the importance of concrete cover with the relation to splitting potential.
Author :
Publisher :
ISBN 13 :
Total Pages : 470 pages
Book Rating : 4.:/5 (318 download)
Download or read book ACI Materials Journal written by and published by . This book was released on 2008 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mohamad Al Ali
Publisher : CRC Press
ISBN 13 : 1315393808
Total Pages : 1300 pages
Book Rating : 4.3/5 (153 download)
Download or read book Advances and Trends in Engineering Sciences and Technologies II written by Mohamad Al Ali and published by CRC Press. This book was released on 2016-11-30 with total page 1300 pages. Available in PDF, EPUB and Kindle. Book excerpt: These are the proceedings of the 2nd International Conference on Engineering Sciences and Technologies (ESaT 2016), held from 29th of June until the 1st of July 2016 in the scenic High Tatras Mountains, Tatranské Matliare, Slovak Republic. After the successful implementation and excellent feedback of the first international conference ESaT 2015, ESaT 2016 was organized under the auspices of the Faculty of Civil Engineering, Technical University of Košice, Slovak Republic in collaboration with the University of Miskolc, Hungary. The conference focused on a wide spectrum of topics and subject areas in civil engineering sciences. The proceedings bringing new and original advances and trends in various fields of engineering sciences and technologies that accost a wide range of academics, scientists, researchers and professionals from universities and practice. The authors of the articles originate from different countries around the world guaranteeing the importance, topicality, quality and level of presented results.
