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Precast concrete elements for accelerated bridge construction : laboratory testing of precast substructure components, Boone County bridge.
  • Published Date:
    2009-01-01
  • Language:
    English
Filetype[PDF-11.24 MB]


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Precast concrete elements for accelerated bridge construction : laboratory testing of precast substructure components, Boone County bridge.
Details:
  • Corporate Creators:
  • Publication/ Report Number:
    IHRB Project TR-561 ; CTRE Project 06-262 ;
  • Resource Type:
  • Geographical Coverage:
  • OCLC Number:
    774986394
  • Edition:
    Final report.
  • NTL Classification:
    NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures ; NTL-HIGHWAY/ROAD TRANSPORTATION-Materials ;
  • Format:
  • Abstract:
    Vol. 1-1: In July 2006, construction began on an accelerated bridge project in Boone County, Iowa that was composed of precast substructure

    elements and an innovative, precast deck panel system. The superstructure system consisted of full-depth deck panels that were

    prestressed in the transverse direction, and after installation on the prestressed concrete girders, post-tensioned in the longitudinal

    direction.

    Prior to construction, laboratory tests were completed on the precast abutment and pier cap elements. The substructure testing was to

    determine the punching shear strength of the elements. Post-tensioning testing and verification of the precast deck system was

    performed in the field. The forces in the tendons provided by the contractor were verified and losses due to the post-tensioning

    operation were measured. The stress (strain) distribution in the deck panels due to the post-tensioning was also measured and analyzed.

    The entire construction process for this bridge system was documented. Representatives from the Boone County Engineers Office, the

    prime contractor, precast fabricator, and researchers from Iowa State University provided feedback and suggestions for improving the

    constructability of this design;

    Vol. 1-2: This second section of Volume 1 focuses on the laboratory testing of full-depth precast, prestressed concrete deck panels used in the

    construction of a continuous four-girder, three span bridge over Squaw Creek on 120th Street in Boone County, Iowa. Various

    laboratory tests were conducted on a single panel and on two panels connected by a closure pour. These tests ranged from determining

    physical properties of the panel (compressive strength and prestressing force), to determining the panel's response in various

    circumstances (moving with a crane, during field leveling, and under loading).

    This report details the results of these laboratory tests;

    Vol. 1-3: A full-depth precast deck bridge was built in Boone County in 2006 as a replacement for an existing bridge. The bridge was constructed

    in an accelerated manner using precast concrete components. A series of laboratory tests were completed by Iowa State University on

    individual segments of the bridge. Detailed description and analysis of these tests can be found in sections 1 and 2 of Volume 1.

    This third and final section of Volume 1 documents the field testing portion of this project. Two field tests were carried out on the

    Boone County bridge. The first took place the summer following construction and the second took place one year later. A summary of

    the testing process, instrumentation plan, and analysis of data are located in this report.

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