Comparison of the Flexural Strength and Behavior of Bonded and Unbonded Prestressed Concrete Beams PDF Download
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Author: Harry L. Johnson
Publisher:
ISBN:
Category :
Languages : en
Pages : 166
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Author: Harry L. Johnson
Publisher:
ISBN:
Category :
Languages : en
Pages : 166
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Author: Adi Abu-Obeidah
Publisher:
ISBN:
Category : Concrete beams
Languages : en
Pages : 135
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Book Description
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.
Author: Chor Suan Tan
Publisher:
ISBN:
Category : Concrete beams
Languages : en
Pages : 244
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Author: Narbey Khachaturian
Publisher:
ISBN:
Category : Girders
Languages : en
Pages : 320
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Book Description
Author: Jack R. Janney
Publisher:
ISBN:
Category : Concrete beams
Languages : en
Pages : 26
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Author: Joseph Warwaruk
Publisher:
ISBN:
Category : Flexure
Languages : en
Pages : 196
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Author: Ashraf Elzanaty
Publisher:
ISBN:
Category : Flexure
Languages : en
Pages : 252
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Book Description
Author: Robert Park
Publisher: John Wiley & Sons
ISBN: 9780471659174
Category : Technology & Engineering
Languages : en
Pages : 794
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Book Description
Sets out basic theory for the behavior of reinforced concrete structural elements and structures in considerable depth. Emphasizes behavior at the ultimate load, and, in particular, aspects of the seismic design of reinforced concrete structures. Based on American practice, but also examines European practice.
Author: James Bryson
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 24
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Book Description
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.
Author: R. J. Allen
Publisher:
ISBN:
Category : Strength of materials
Languages : en
Pages : 90
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