Deformation Characteristics of Pretensioned Concrete Beams in Flexure PDF Download
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Author: George Raffa
Publisher:
ISBN:
Category : Concrete beams
Languages : en
Pages : 0
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Book Description
The object of this thesis was to study the deformation characteristics of bonded, prestressed concrete beams loaded in flexure. Of particular interest was the moment-curvature relationship. All beams had a 6 x 12-in. cross-section and an effective depth of 10 in. Six of the beams were loaded at two points symmetrical about midspan and had a span length of 11 ft. The remaining four beams were loaded at midspan only. Two of these beams had an 11-ft. span and the other two a span of 56 -in. For the two-point loaded beams the percentage of reinforcement was varied from 0.19 to 0.53 and two levels of concrete strength were used. All the one-point loaded beams had reinforcement ratios of 0.38; the concrete strength was varied as for the two-point loaded beams. The load-deformation relationships exhibited three distinct stages of behavior. The amount of reinforcement had a considerable effect on the extent of these stages. Further investigation is required to study the behavior of similar beams having a concrete strength on the order of 3000 psi.
Author: George Raffa
Publisher:
ISBN:
Category : Concrete beams
Languages : en
Pages : 0
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Book Description
The object of this thesis was to study the deformation characteristics of bonded, prestressed concrete beams loaded in flexure. Of particular interest was the moment-curvature relationship. All beams had a 6 x 12-in. cross-section and an effective depth of 10 in. Six of the beams were loaded at two points symmetrical about midspan and had a span length of 11 ft. The remaining four beams were loaded at midspan only. Two of these beams had an 11-ft. span and the other two a span of 56 -in. For the two-point loaded beams the percentage of reinforcement was varied from 0.19 to 0.53 and two levels of concrete strength were used. All the one-point loaded beams had reinforcement ratios of 0.38; the concrete strength was varied as for the two-point loaded beams. The load-deformation relationships exhibited three distinct stages of behavior. The amount of reinforcement had a considerable effect on the extent of these stages. Further investigation is required to study the behavior of similar beams having a concrete strength on the order of 3000 psi.
Author: Theodore Belke
Publisher:
ISBN:
Category : Deformations (Mechanics)
Languages : en
Pages : 0
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Book Description
The object of this investigation was to study the deformation characteristics of bonded, prestressed concrete beams subjected to bending and shear. The effects of several variables on the moment-curvature relationship, load-deflection relationship and the distribution of curvature were studied. In all, fifteen beams having a 6 x 14 5/8-in. cross-section and a 10-in, effective depth were tested. Twelve beams were loaded with a single concentrated load at midspan and the remaining three beams were loaded with two loads symmetrical about midspan. From the test data obtained, load-deflection relationships, moment-curvature relationships, distributions of curvature and distributions of strain in the extreme compression fiber were derived. In addition, the derived moment-curvature relationships were compared with theoretical moment-curvature relationships and measured load-deflection relationships were compared with load-deflection relationships computed from the measured distributions of curvature. Correlation between the measured and theoretical moment-curvature relationships was good, except for the second and third stages of behavior. Computed deflections were found to be lower than the measured values for beams with a shear-span-to-depth ratio of 3.3. The tests indicated that the moment-curvature and load-deflection relationships were dependent on the characteristics of the beam cross-section. Span length and type of load condition also affected the load-deflection relationship.
Author: Helarisi Abeyruwan
Publisher: Open Dissertation Press
ISBN: 9781374767096
Category :
Languages : en
Pages :
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Book Description
This dissertation, "Cracking and Deformation Characteristics of Concrete Beams With Prestressed Concrete Reinforcement" by Helarisi, Abeyruwan, 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. DOI: 10.5353/th_b3120649 Subjects: Prestressed concrete beams Concrete - Cracking
Author: Helarisi Abeyruwan
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 130
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Book Description
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: A. Tam
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: James Raymond Gaston
Publisher:
ISBN:
Category : Girders
Languages : en
Pages : 584
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Book Description
Author: K. Cengizkan
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Narbey Khachaturian
Publisher:
ISBN:
Category : Girders
Languages : en
Pages : 320
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Book Description
Author: N. Rajagopalan
Publisher: Alpha Science Int'l Ltd.
ISBN: 9781842652121
Category : Technology & Engineering
Languages : en
Pages : 512
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Book Description
This book deals fundamentally with the basic philosophy, principles and the application of prestressing in structural elements. It also covers the detailed engineering of the structural elements with prestressing forces in terms of analysis and design. Different systems of prestressing, losses in prestressing and evaluation of capacity of prestressed concrete sections in flexure, shear and torsion, the force flow due to prestressing at anchorage zones, the time dependent effects due to creep and shrinkage of materials are explained. The design of prestressed concrete elements is covered with a holistic concept. In case of indeterminate structures, the effect of prestressing while satisfying the compatibility conditions has been clearly explained. The necessary philosophy and the design procedures of partially prestressed elements have been specifically dealt with. Accepted National and International Code provisions for design of prestressed concrete elements under the effect of the various loads have been elaborately discussed with worked out examples.
