Design of Continuous Prestressed Concrete Bridge Girders
Title | Design of Continuous Prestressed Concrete Bridge Girders PDF eBook |
Author | Ali Pahlavan |
Publisher | |
Pages | 196 |
Release | 1958 |
Genre | |
ISBN |
The design of continuous prestressed concrete bridge girders by computer
Title | The design of continuous prestressed concrete bridge girders by computer PDF eBook |
Author | Edward Michael Aziz |
Publisher | |
Pages | 752 |
Release | 1963 |
Genre | Concrete construction |
ISBN |
Automated Design of Continuous Bridges with Precast Prestressed Concrete Beams
Title | Automated Design of Continuous Bridges with Precast Prestressed Concrete Beams PDF eBook |
Author | Harry L. Jones |
Publisher | |
Pages | 175 |
Release | 1974 |
Genre | Continuous bridges |
ISBN |
A Computer program has been developed in this study to perform the calculations for the design of continuous prestressed concrete bridge girders. The continuous girder is constructed from simple span precast concrete I-shaped beams made continuous by supplementary reinforcing in the deck and the ends of the precast beams. Specifications for the designs produced are those currently accepted by the State Department of Highways and Public Transportation. This volume of the report contains a description of the computer program, instructions for its use and information on its structure and operation.
Design of Girders in a Three Span Continuous Prestressed Concrete Bridge
Title | Design of Girders in a Three Span Continuous Prestressed Concrete Bridge PDF eBook |
Author | E. Hrudko |
Publisher | |
Pages | 130 |
Release | 1969 |
Genre | Concrete bridges |
ISBN |
Continuous Prestressed Concrete Girder Bridges
Title | Continuous Prestressed Concrete Girder Bridges PDF eBook |
Author | Mary Beth Deisz Hueste |
Publisher | |
Pages | 211 |
Release | 2016 |
Genre | Continuous bridges |
ISBN |
The Texas Department of Transportation designs typical highway bridge structures as simple span systems using standard precast, pretensioned girders. Spans are limited to about 150 ft due to weight and length restrictions on transporting the precast girder units from the prestressing plant to the bridge site. Such bridge construction, while economical from an initial cost point of view, may become somewhat limiting when longer spans are needed. This project focused on developing additional economical design alternatives for longer span bridges with main spans ranging from 150-300 ft, using continuous precast, prestressed concrete bridge structures with in-span splices. Phase 1 of this study focused on evaluating the current state-of-the-art and practice relevant to continuous precast concrete girder bridges and recommending suitable continuity connections for typical Texas bridge girders; the findings are documented in the Volume 1 project report. This report summarizes Phase 2 of the research including detailed design examples for shored and partially shored construction, results of a parametric design study, and results of an experimental program that tested a full-scale girder containing three splice connections. The parametric design study indicated that for bridges spanning from 150-300 ft, continuous precast, prestressed concrete girder bridges with in-span splices can provide an economical alternative to steel girder bridges and segmental concrete box girder construction. The tested splice connections performed well under service level loads. However, the lack of continuity of the pretensioning through the splice connection region had a significant impact on the behavior at higher loads approaching ultimate conditions. Improved connection behavior at ultimate conditions is expected through enhanced connection details. Recommendations for design of continuous spliced precast girders, along with several detailing suggestions are discussed in the report.
Connection of Simple-span Precast Concrete Girders for Continuity
Title | Connection of Simple-span Precast Concrete Girders for Continuity PDF eBook |
Author | Richard A. Miller (Professional engineer) |
Publisher | Transportation Research Board |
Pages | 202 |
Release | 2004 |
Genre | Concrete beams |
ISBN | 0309087937 |
Introduction and Research Approach -- Findings -- Interpretation, Appraisal, and Application -- Interpretation, Appraisal, and Application -- References -- Appendixes.
Design of Precast, Prestressed Bridge Girders Made Continuous
Title | Design of Precast, Prestressed Bridge Girders Made Continuous PDF eBook |
Author | R. G. Oesterle |
Publisher | Transportation Research Board National Research |
Pages | 108 |
Release | 1989 |
Genre | Technology & Engineering |
ISBN |
This report documents and presents results of a study to determine time-dependent behavior and relevant design criteria for simple-span precast, prestressed bridge girders made continuous. A questionnaire was used to determine current practice. Creep and shrinkage tests of steam-cured concrete loaded at an early age were made. Computer simulations were used to investigate the effects of time-dependent material behavior and variation in design parameters on the effective continuity for live load plus impact. The findings suggest that positive moment connections in the diaphragms at the piers are not required and provide no structural advantages. The findings also suggest that effective continuity for live load plus impact can vary from 0 to 100% dependent on the design parameters and timing of construction. Computer analyses were also used to determine an upper limit for the amount of negative moment reinforcement over the supports to insure full moment redistribution and attainment of maximum bridge strength. New computer programs were developed for simplified analysis to determine time-dependent effects and service moments. Recommendations for design procedures were presented and design examples given.