Shear and Flexural Capacity of High Strength Prestressed Concrete Bridge Girders PDF Download

Author: Arek Tilmann Higgs
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Neil Middleton Hawkins
Publisher: Transportation Research Board
ISBN: 0309098866
Category : Bridges
Languages : en
Pages : 206

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"Research sponsored by the American Association of State Highway and Transportation Officials in cooperation with the Federal Highway Administration."

Author: J.A. Ramirez
Publisher:
ISBN: 9781622601844
Category :
Languages : en
Pages :

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Author: Kamal S. Tawfiq
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 152

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Author: Paul Barr
Publisher:
ISBN:
Category : Girders
Languages : en
Pages : 244

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The design procedure to calculate the shear capacity of bridge girders that was used forty years ago is very different than those procedures that are recommended in the current AASHTO LRFD Specifications. As a result, many bridge girders that were built forty years ago do not meet current design standards, and in some cases warrant replacement due to insufficient calculated shear capacity. However despite this insufficient calculated capacity, these bridge girders have been found to function adequately in service with minimal signs of distress. The objective of this research was to investigate the actual in service capacity of prestressed concrete girders that have been in service over an extended period of time.

Author: David L. Hartmann
Publisher:
ISBN:
Category : Concrete beams
Languages : en
Pages : 278

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Author: Maher K. Tadros
Publisher: Transportation Research Board
ISBN: 030908766X
Category : Technology & Engineering
Languages : en
Pages : 73

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"The HCM includes three printed volumes (Volumes 1-3) that can be purchased from the Transportation Research Board in print and electronic formats. Volume 4 is a free online resource that supports the rest of the manual. It includes: Supplemental chapters 25-38, providing additional details of the methodologies described in the Volume 1-3 chapters, example problems, and other resources; A technical reference library providing access to a significant portion of the research supporting HCM methods; Two applications guides demonstrating how the HCM can be applied to planning-level analysis and a variety of traffic operations applications; Interpretations, updates, and errata for the HCM (as they are developed);A discussion forum allowing HCM users to ask questions and collaborate on HCM-related matters; and Notifications of chapter updates, active discussions, and more via an optional e-mail notification feature."--Publisher.

Author: Kamal Tawfiq
Publisher:
ISBN:
Category : Concrete beams
Languages : en
Pages : 254

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Author: William Leo Gamble
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 280

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Tests of two prestressed concrete composite bridge girders which were continuous over two spans are reported. Both were I-section girders with cast-in-place decks, and had spans of about 37 ft (11 m), and were approximately 1/3 scale models of structures spanning 125 ft (38 m). Each girder was constructed from three segments which were joined end-to-end by cast-in-place concrete splices. Modell was post-tensioned after erection of the girders and casting of the deck and splice concrete. The two end segments, each supported on the final abutments and on temporary supports located about 1/3 of the span from the central pier, were pretensioned for their dead loads plus the deck concrete. The central segment, which was supported on the central pier of the structure plus the two temporary supports was precast reinforced concrete, plus a small amount of pre= tensioned reinforcement. Model 2 was externally similar, but was not post-tensioned. The segments were pretensioned for the final moments, and were joined by splicing reinforcing bars which extended into the splice region. Both structures were subjected to a series of loadings to the service load, design ultimate, and high over-load levels. Both had capacities which were significantly higher than the design ultimate values. The capacities were generally predictable on the basis of flexural strength calculations, and shear did not cause major problems. Joint details in Modell lead to difficulties in two tests, and this aspect of the design is discussed in detail.

Author: Kamal Tawfiq
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 127

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