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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Behavior and Strength of Splices for Continuous Prestressed Concrete Girder Bridges
Author(s): Mary Beth D. Hueste, John B. Mander, Reza Baie, Anagha S. Parkar, Akshay Parchure, J. Michelle Prouty and Tristan Sarremejane
Publication: Special Publication
Appears on pages(s): 1-20
Keywords: bridges, connections, continuity, design, post-tensioning, prestressed concrete, spliced girder
Abstract:The span length of precast prestressed concrete girder bridges is typically limited to 140–160 ft (43–49 m) due to handling and transportation restrictions on individual girder segments. Span lengths may be doubled by splicing individual girder segments within the spans to form a continuous bridge. A design for a three-span continuous prototype bridge with a 240 ft (73 m) main span and 190 ft (58 m) end spans using modified Tx70 precast concrete girders has been developed. A full-scale experimental study investigated the performance of the prototype bridge details in the splice region under service and ultimate loads. The tested splice connection details were selected to represent critical design parameters. The 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. Moderate ductility was observed for positive bending with low
ductility for negative moment. Ideally, spliced connections should be located in regions of low moment demands, away from the peak positive or negative moments. Improved connection behavior at ultimate conditions is expected
through enhanced connection details, and several detailing suggestions are discussed.
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