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A Study On The Flexural Behavior Of Beams Containing Non Bonded Stressteel Tendons In Combination With Bonded Non Tensioned Steel Reinforcement
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Book Synopsis A Study on the Flexural Behavior of Beams Containing Non-bonded Stressteel Tendons in Combination with Bonded, Non-tensioned Steel Reinforcement by : Joseph P. Woolums
Download or read book A Study on the Flexural Behavior of Beams Containing Non-bonded Stressteel Tendons in Combination with Bonded, Non-tensioned Steel Reinforcement written by Joseph P. Woolums and published by . This book was released on 1967 with total page 168 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 Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States by :
Download or read book Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States written by and published by . This book was released on 1968 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Master's Theses and Doctoral Dissertations in the Pure and Applied Sciences by :
Download or read book Master's Theses and Doctoral Dissertations in the Pure and Applied Sciences written by and published by . This book was released on 1969 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexural Behavior of Prestressed Concrete Composite Tee-beams by : James Bryson
Download or read book Flexural Behavior of Prestressed Concrete Composite Tee-beams written by James Bryson and published by . This book was released on 1970 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prestressed Tee-beams constructed by the split-beam method were tested to failure in flexure to study the behavior and ultimate strength of these beams and to compare their flexural characteristics with those of prestressed beams of conventional construction. Results showed that composite split-beams behaved similarly to the monolithically constructed beams on the basis of flexural response and ultimate load.
Book Synopsis The Flexural Behaviour of Concrete Beams with Bonded External Reinforcement by : M. D. Macdonald
Download or read book The Flexural Behaviour of Concrete Beams with Bonded External Reinforcement written by M. D. Macdonald and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behaviour in Flexure of Concrete Beams Containing Tensioned and Non-tensioned Reinforcement [microform] by : Hutton, Stanley George
Download or read book Behaviour in Flexure of Concrete Beams Containing Tensioned and Non-tensioned Reinforcement [microform] written by Hutton, Stanley George and published by National Library of Canada. This book was released on 1972 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 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 Flexural Behavior of Reinforced Concrete Beams Externally Bonded with CFRP Sheets by : Yue Zhang
Download or read book Flexural Behavior of Reinforced Concrete Beams Externally Bonded with CFRP Sheets written by Yue Zhang and published by . This book was released on 2003 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexural Behavior of Reinforced Concrete Beams by : Stuart Hawley Bartholomew
Download or read book Flexural Behavior of Reinforced Concrete Beams written by Stuart Hawley Bartholomew and published by . This book was released on 1953 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexural Design Methodology for Heterogenous and Composite UHPC Prestressed Concrete Beams with Bonded Tendons by : Anthony John Victor
Download or read book Flexural Design Methodology for Heterogenous and Composite UHPC Prestressed Concrete Beams with Bonded Tendons written by Anthony John Victor and published by . This book was released on 2020 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract This study deals with the flexural behavior of all UHPC and composite UHPC beams prestressed with bonded tendons. Flexural behavior is investigated numerically in terms of the failure mode for each beam type and in terms of the mobilization of material capacity . Stress in pre-stressing strands at the ultimate limit state is predicted using finite element analysis, strain compatibility, as well as closed form equations. It is investigated whether the strain compatibility approach and proposed closed form equations are able to predict with good accuracy the stress in strands at the ultimate limit state. It is determined whether the behavior of a composite bridge constructed with prestressed UHPC beams and a normal strength concrete deck is comparable to that when both the beam and the deck are constructed with UHPC. Various concrete strengths for the deck are investigated to yield a comparable performance with all UHPC construction to result in an economical solution without compromising capacity. For cases that feature all UHPC construction (i.e. the beam and the deck) the mobilization of the material strength at the ultimate limit state is investigated. Failure mode for each case is characterized either as a concrete compression controlled failure, or a concrete tension controlled failure using validated material constitutive models. A proposed design methodology for determining flexural capacity at the ultimate limit state is presented. The proposed methodology is validated using data obtained from over 150 girder sections investigated numerically using validated finite element models, and strain compatibility analysis. The benefits of composite construction featuring a normal weight concrete deck and a UHPC beam are demonstrated by conducting a parametric analysis and monitoring the flexural failure mode and the utilization of material capacity.
Book Synopsis Behaviour in Flexure of Concrete Beams Containing Tensioned and Non-tensioned Reinforcement by : S. G. Hutton
Download or read book Behaviour in Flexure of Concrete Beams Containing Tensioned and Non-tensioned Reinforcement written by S. G. Hutton and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexural Behavior of Steel-fiber-reinforced Concrete Beams by : Panat Kungsuwan
Download or read book Flexural Behavior of Steel-fiber-reinforced Concrete Beams written by Panat Kungsuwan and published by . This book was released on 2001 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexural Strength, Ductility, and Serviceability of Beams that Contain High-Strength Steel Reinforcement and High-Grade Concrete by :
Download or read book Flexural Strength, Ductility, and Serviceability of Beams that Contain High-Strength Steel Reinforcement and High-Grade Concrete written by and published by . This book was released on 2018 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: Utilizing the higher capacity steel in design can provide additional advantages to the concrete construction industry including a reduction of congestion, improved concrete placement, reduction in the required reinforcement and cross sections which would lead to savings in materials, shipping, and placement costs. Using high-strength reinforcement is expected to impact the design provisions of ACI 318 code and other related codes. The Applied Technology Council (ATC-115) report "Roadmap for the Use of High-Strength Reinforcement in Reinforced Concrete Design" has identified key design issues that are affected by the use of high-strength reinforcement. Also, ACI ITG-6, "Design Guide for the Use of ASTM A1035 Grade 100 Steel Bars for Structural Concrete" and NCHRP Report 679, "Design of Concrete Structures Using High-Strength Steel Reinforcement" have made progress towards identifying how code provisions in ACI 318 and AASHTO could be changed to incorporate high-strength reinforcement. The current research aims to provide a closer investigation of the behavior of beams reinforced with high-strength steel bars (including ASTM A615 Grade 100 and ASTM A1035 Grades 100 and 120) and high-strength concrete up to 12000 psi. Focus of the research is on key design issues including: ductility, stiffness, deflection, and cracking. The research includes an extensive review of current literature, an analytical study and conforming experimental tests, and is directed to provide a number of recommendations and design guidelines for design of beams reinforced with high-strength concrete and high-strength steel. Topics investigated include: strain limits (tension-controlled and compression-controlled, and minimum strain in steel); possible change for strength reduction factor equation for transition zone; evaluation of the minimum reinforcement ratio; recommendations regarding limiting the maximum stress for the high-strength reinforcement; and prediction of deflection and crack width at service load levels. Moreover, this research includes long-term deflection test of a beam made with high grade concrete and high-strength steel under sustained load for twelve months to evaluate the creep deflection and to insure the appropriateness of the current ACI 318 time-dependent factor, [lambda], which does not consider the yield strength of reinforcement and the concrete grade.
Book Synopsis Strength and behavior in flexure of bonded prestressed concrete beams reinforced in tension only by : Engin Keyder
Download or read book Strength and behavior in flexure of bonded prestressed concrete beams reinforced in tension only written by Engin Keyder and published by . This book was released on 1965 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexural behavior of post-tensioned T-beam with unbonded tendons by : Sow-Wen Chang
Download or read book Flexural behavior of post-tensioned T-beam with unbonded tendons written by Sow-Wen Chang and published by . This book was released on 1979 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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