The Behavior of Prestressed High Performance Concrete Bridge Girders for US Highway 401 Over the Neuse River in Raleigh, NC PDF Download
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Author:
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 160
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Book Description
High performance concrete (HPC) with higher compressive strength (in the range of 8,000 to 10,000 psi) and increased durability is rapidly gaining acceptance for bridge construction. The goal of this project was to implement and demonstrate the economic benefits of the HPC technology in bridge design and construction in North Carolina, thereby providing a greater value to the public. Specifically, the project monitored the production of HPC in typical plant and field conditions, confirmed the feasibility of producing HPC bridge girders and decks, and validated the expected behavior of bridge superstructures built with HPC girders and decks.
Author:
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 160
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Book Description
High performance concrete (HPC) with higher compressive strength (in the range of 8,000 to 10,000 psi) and increased durability is rapidly gaining acceptance for bridge construction. The goal of this project was to implement and demonstrate the economic benefits of the HPC technology in bridge design and construction in North Carolina, thereby providing a greater value to the public. Specifically, the project monitored the production of HPC in typical plant and field conditions, confirmed the feasibility of producing HPC bridge girders and decks, and validated the expected behavior of bridge superstructures built with HPC girders and decks.
Author:
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 102
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Book Description
Author: Thomas E. Cousins
Publisher: Transportation Research Board
ISBN: 030925888X
Category : Architecture
Languages : en
Pages : 91
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Book Description
"TRB's National Cooperative Highway Research Program (NCHRP) Report 733: High-Performance/High-Strength Lightweight Concrete for Bridge Girders and Decks presents proposed changes to the American Association of State Highway and Transportation Officials' Load and Resistance Factor Design (LRFD) bridge design and construction specifications to address the use of lightweight concrete in bridge girders and decks. The proposed specifications are designed to help highway agencies evaluate between comparable designs of lightweight and normal weight concrete bridge elements so that an agency's ultimate selection will yield the greatest economic benefit. The attachments contained in the research agency's final report provide elaborations and detail on several aspects of the research. Attachments A and B provide proposed changes to AASHTO LRFD bridge design and bridge construction specifications, respectively; these are included in the print and PDF version of the report. Attachments C through R are available for download below. Attachments C, D, and E contain a detailed literature review, survey results, and a literature summary and the approved work plan, respectively. Attachment C; Attachment D ; Attachment E; Attachments F through M provide details of the experimental program that were not able to be included in the body of this report. Attachment F; Attachment G; Attachment H; Attachment I; Attachment J; Attachment K; Attachment L; Attachment M. Attachments N through Q present design examples of bridges containing lightweight concrete and details of the parametric study. Attachment N; Attachment O; Attachment P; Attachment Q. Attachment R is a detailed reference list."--Publication information.
Author: Maher K. Tadros
Publisher: Nchrp Report
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 76
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Book Description
"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: Benjamin A. Graybeal
Publisher:
ISBN:
Category : High strength concrete
Languages : en
Pages : 96
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Book Description
Author: National Cooperative Highway Research Program
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: S. H. Rizkalla
Publisher: Transportation Research Board
ISBN: 0309099056
Category : Bridges
Languages : en
Pages : 37
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Book Description
Explores recommended revisions to the American Association of State Highway and Transportation Officials' Load and Resistance Factor Design (LRFD) Bridge Design Specifications to extend the applicability of the flexural and compression design provisions for reinforced and prestressed concrete members to concrete strengths greater than 10 ksi.
Author: Reid Wilson Castrodale
Publisher: Transportation Research Board
ISBN: 0309087872
Category : Concrete bridges
Languages : en
Pages : 603
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Book Description
At head of title: National Cooperative Highway Research Program.
Author: Maher K. Tadros
Publisher: Transportation Research Board
ISBN: 0309118352
Category : Technology & Engineering
Languages : en
Pages : 76
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Book Description
This report establishes a user's manual for the acceptance, repair, or rejection of precast/prestressed concrete girders with longitudinal web cracking. The report also proposes revisions to the AASHTO LRFD Bridge Design Specifications and provides recommendations to develop improved crack control reinforcement details for use in new girders. The material in this report will be of immediate interest to bridge engineers.
Author: Mohamed E. Mohamed
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 396
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Book Description
Over recent years, the applications of Carbon Fiber Composite Cables (CFCC) for post-tensioning and pre-tensioning of precast concrete bridge girders have increased substantially. Nevertheless, the increasing use of CFCC strands requires careful consideration for the long-term performance of CFRP material. The impact of high temperatures, seasonal temperature variations, and freeze-thaw cycles has the potential to adversely affect the long-term bond between CFCC and concrete and can lead to deterioration of the structural elements. Through this experimental study, stress rupture tests were conducted on un-bonded CFCC specimens loaded with various stress levels to study the stress rupture behavior of CFCC. Un-bonded CFCC specimens were prestressed with different prestressing levels and subjected to harsh winter and summer conditions over a period of two and half years. The monitoring curves were compared with those of identical specimens stored and monitored in controlled laboratory conditions. In a parallel investigation, the thermal behavior of post-tensioned CFCC strands was investigated through thermal tests conducted on un-bonded CFCC specimens under transient states of elevated temperatures. Flexural tests were performed on CFCC-prestressed beams under different seasonal temperatures to evaluate the effect of temperature variation on the effective prestress level in bonded CFCC strands. The behavior of CFCC strands under severe environments was investigated through freeze-thaw tests carried out on a four CFCC-prestressed beams along with five post-tensioned CFCC specimens. Effect of freeze-thaw exposure was assessed by testing the prestressed beams under flexural tests and CFCC specimens through uniaxial tensile tests. Test results showed that the maximum jacking stress limit for prestressing CFCC strands can be increased safely to 72% of the design ultimate tensile strength. Out of different environmental conditions, seasonal temperature change seems to affect the effective prestressing force in beams prestressed or post-tensioned with CFCC strands. The change in prestressing force can be accurately estimated and implemented in teh initial design of bridge beams. In addition, the increase in temperature was found to temporarily affect the level of effective prestressing force. However, it does not seem to induce any permanent alteration in the residual capacity of CFCC strands. Finally, the freeze-thaw cycling exposure was found to mainly affect the ultimate stage and the failure modes of CFCC-prestressed beams.
