Abstract
Abstract The latest bridge design manual from the Precast/Prestressed Concrete Institute (PCI) provides preliminary design charts for selecting the girder size and prestressing strands for a given span length and beam spacing but only for fc′ = 55 MPa and 0.6-in. (15-mm) diameter strands. This single concrete strength and strand size may limit the use of the charts, particularly in states considering high- and ultrahigh-performance concrete. Accordingly, this paper presents a simplified procedure to develop preliminary design charts for prestressed concrete bulb-tee girders based on the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) bridge design specifications considering service load stress limits and flexural strength. The procedure is demonstrated for a BT-72 section and new LRFD charts are generated to compare the effects of higher concrete strength and larger strand size on bridge girder design. The benefits and limitations of the...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Practice Periodical on Structural Design and Construction
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.