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Full Range Behaviour Of Concrete Beams Partially Prestressed With Unbonded Tendons
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Book Synopsis Full-Range Behaviour of Concrete Beams Partially Prestressed with Unbonded Tendons by : Karmen Tso
Download or read book Full-Range Behaviour of Concrete Beams Partially Prestressed with Unbonded Tendons written by Karmen Tso and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Full-range Behaviour of Concrete Beams Partially Prestressed With Unbonded Tendons" by Karmen, Tso, 曹嘉雯, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. 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. All rights not granted by the above license are retained by the author. Abstract: ABSTRACT OF THESIS ENTITLED Full-range Behaviour of Concrete Beams Partially Prestressed with Unbonded Tendons submitted by TSO Karmen for the degree of Master of Philosophy at The University of Hong Kong in February 2007 External prestressing can be applied to both new construction and retrofitting of existing reinforced and prestressed concrete structures. The behaviour of prestressed concrete structures with unbonded tendons differs significantly from that of those with bonded tendons after the working stage. To assess the safety of such structures, it is necessary to carry out full-range analysis, with particular attention to the post-peak behaviour. This thesis presents the results of an experimental study of externally prestressed concrete beams with either conventional or non-conventional tendons, which were tested to failure. The specimens tested all had T-sections prestressed by two external tendons with one on each side. Two types of tendon were used, namely 7-wire steel strands of 10.5 mm diameter and aramid fibre reinforced polymer (AFRP) tendons of 13.5 mm diameter. Unlike the steel tendons, the fibre reinforced polymer (FRP) tendons are not prone to corrosion. However, the prestressing operations for FRP tendons had to be modified to suit. In the experiments, different factors were taken into consideration. They included the level of prestressing force, concrete strength, area of non-prestressed steel reinforcement and partial prestressing ratio. - 1 - The full-range behaviour of partially prestressed concrete with either external unbonded steel or fibre reinforced polymer (FRP) tendons was significantly affected by second-order effects, as demonstrated in the strain profiles of top and bottom non- prestressed reinforcement and the variations of curvature and neutral axis depth. During the investigation of tendon force, the friction loss at deviator was found to be much greater than the friction loss estimated from the coefficients of friction given by the manufacturers. The equivalent coefficients of friction of steel and AFRP tendon were studied. Lastly, by using various ductility and deformability indices, the ductility or deformability of partially prestressed concrete with external unbonded tendons were investigated. The most suitable ductility or deformability index is proposed. (TSO Karmen) (302 words) - 2 - DOI: 10.5353/th_b3822557 Subjects: Tendons (Prestressed concrete) - Testing Prestressed concrete beams - Testing
Book Synopsis Full-range Behaviour of Concrete Beams Partially Prestressed with Unbonded Tendons by : Karmen Tso
Download or read book Full-range Behaviour of Concrete Beams Partially Prestressed with Unbonded Tendons written by Karmen Tso and published by . This book was released on 2007 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies on the Behaviour of Partially Prestressed Concrete Beams with Unbonded Tendons by : Kelvin John Watts
Download or read book Studies on the Behaviour of Partially Prestressed Concrete Beams with Unbonded Tendons written by Kelvin John Watts and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Project is to study the behaviour of partially prestressed concrete beams with unbonded tendons. The main objective of the testing was to assess the amount of ductility that can be obtained from a post tensioned beam with unbonded tendon profile.
Book Synopsis Flexural Behaviour of Unbonded Post-tensioned Partially Prestressed Concrete Beams by : Ashraf Elzanaty
Download or read book Flexural Behaviour of Unbonded Post-tensioned Partially Prestressed Concrete Beams written by Ashraf Elzanaty and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ON THE FLEXURAL BEHAVIOR OF CONCRETE BEAMS PRESTRESSED WITH UNBONDED INTERNAL AND EXTERNAL TENDONS (UNBONDED TENDONS, BEAMS). by : FADI MAAZ ALKHAIRI
Download or read book ON THE FLEXURAL BEHAVIOR OF CONCRETE BEAMS PRESTRESSED WITH UNBONDED INTERNAL AND EXTERNAL TENDONS (UNBONDED TENDONS, BEAMS). written by FADI MAAZ ALKHAIRI and published by . This book was released on 1991 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt: from 15 different investigations. Excellent correlation was obtained between predicted vs. experimental results. The present investigation suggests that shear deformations may have some effect on the stress increase in unbonded tendons for beams having low span-to-depth ratios, while eccentricity variations in external tendons significantly affect the overall behavior for beams having high span-to-depth ratios.
Book Synopsis A Study of the Deflection and Strength of Partially Prestressed Concrete Beams with Unbonded Tendons by : K.-Y. Chu
Download or read book A Study of the Deflection and Strength of Partially Prestressed Concrete Beams with Unbonded Tendons written by K.-Y. Chu and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexural Behavior of Concrete Beams Prestressed with Bonded and Unbonded Tendons by : Adi Abu-Obeidah
Download or read book Flexural Behavior of Concrete Beams Prestressed with Bonded and Unbonded Tendons written by Adi Abu-Obeidah and published by . This book was released on 2017 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of unbonded tendons in prestressed concrete beams has been widely utilized in bridges, parking structures, and residential buildings for strengthening, rehabilitation or repair of such members. With the growth of live load and the increase of damaged concrete members, there is a need to develop and utilize new techniques for more efficient and improved designs in prestressed concrete members. This research presents an experimental and analytical investigation for the use of combination of bonded and unbonded tendons in the same concrete members. With the availability of high strength concrete, as well as the development of new prestressing technologies, the process can be easily performed at the site for repair or capacity upgrading resulting in longer spans for the same section depth or shallower sections. There is a knowledge gap on the behavior of concrete beams prestressed with hybrid tendons and a need to fully understand their overall behavior under full service loads. The hybrid technique introduces unbonded CFRP tendons, which is resistant to corrosion. In addition, CFRP tendons exhibit linear stress-strain relationship resulting in more accurate predictions for the tendon stress at ultimate. This hybrid system presents a challenge in developing an analytical model that could predict their behavior since the unbonded tendon is not bonded with the concrete. This investigation included the testing of 15 High Strength Concrete (HSC) beams prestressed with hybrid tendons. Results from the experimental study included number of cracks, load-deflection behavior, and strains in prestressing strand, reinforcing steel, and concrete. This study emphasizes the prediction of the ultimate stress of the unbonded tendon (fps) in unbonded or hybrid system for computing the ultimate moment resistance. Finite element modeling and analysis of various beams is performed. Based on a comparison of equations available in the literature as well as code provisions with the experimental results, a simplified prediction equation for predicting the stress in the unbonded tendons at ultimate is recommended.
Book Synopsis Developments in Mechanics of Structures and Materials by : Andrew J. Deeks
Download or read book Developments in Mechanics of Structures and Materials written by Andrew J. Deeks and published by Taylor & Francis Group. This book was released on 2005 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexural Behavior of High Strength Concrete Beams Prestressed with Unbonded Tendons by : Padit Tanchan
Download or read book Flexural Behavior of High Strength Concrete Beams Prestressed with Unbonded Tendons written by Padit Tanchan and published by . This book was released on 2001 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Analytical Study of the Behavior of Concrete Beams Prestressed with Unbonded Tendons by : Muhamed H. Harajli
Download or read book Experimental and Analytical Study of the Behavior of Concrete Beams Prestressed with Unbonded Tendons written by Muhamed H. Harajli and published by . This book was released on 1990 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Structural Assessment by : K.S. Virdi
Download or read book Structural Assessment written by K.S. Virdi and published by CRC Press. This book was released on 2003-09-02 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book examines the role of physical testing in the development of design methods for new structural forms, new constructional materials and techniques, as well new approaches to the maintenance, repair and operation of structures.
Book Synopsis Behavior of I-shaped prestressed concrete beams with unbonded tendons by : Oscar Lee Atkins
Download or read book Behavior of I-shaped prestressed concrete beams with unbonded tendons written by Oscar Lee Atkins and published by . This book was released on 1967 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexural Behaviour of Flanged Concrete Beams Prestressed with Unbonded Steel Or FRP Tendons by :
Download or read book Flexural Behaviour of Flanged Concrete Beams Prestressed with Unbonded Steel Or FRP Tendons written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior of ribbed prestressed concrete beams with unbonded tendons by : Shan-torng Chen
Download or read book Behavior of ribbed prestressed concrete beams with unbonded tendons written by Shan-torng Chen and published by . This book was released on 1967 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theoretical Analysis of the Flexural Strength and Behaviour of Unbonded Partially Prestressed Concrete Beams and Slabs with and Without Bonded Reinforcement by : Chor Suan Tan
Download or read book Theoretical Analysis of the Flexural Strength and Behaviour of Unbonded Partially Prestressed Concrete Beams and Slabs with and Without Bonded Reinforcement written by Chor Suan Tan and published by . This book was released on 1989 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Concrete Technology Set by : John Newman
Download or read book Advanced Concrete Technology Set written by John Newman and published by Elsevier. This book was released on 2003-11-06 with total page 1920 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the Institute of Concrete Technology's advanced course, this new four volume series is a comprehensive educational and reference resource for the concrete materials technologist. An expert international team of authors from research, academia and industry has been brought together to produce this unique reference source. Each volume deals with different aspects of the properties, composition, uses and testing of concrete. With worked examples, case studies and illustrations throughout, this series will be a key reference for the concrete specialist for years to come. Expert international authorship ensures the series is authoritative Case studies and worked examples help the reader apply their knowledge to practice Comprehensive coverage of the subject gives the reader all the necessary reference material
Download or read book FRPRCS-5 written by C. J. Burgoyne and published by Thomas Telford. This book was released on 2001 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fibre reinforced plastics are increasingly being used as replacements for steel reinforcement in concrete structures. The reinforcement can be untensioned, or it can be in the form of prestressing tendons. It is also suitable for gluing onto the outside of a structure to improve flexural or shear performance. This book provides up-to-date research results to give engineers confidence in their design methods.
