Model Study of the Proposed Precast-Prestressed Bridge System

A model study of a particular prestressed-precast composite member is presented. The proposed composite member is composed of a prestressed concrete channel, an interior void form, and a top slab of cast-in-place concrete. Theoretical model analysis is developed for the particular member and possible deviations from theory are discussed. A one-half scale model member is designed to satisfy the 1961 AASHO Code structural requirements and the similitude criteria are established. To check the agreement between theoretical similitude ratios and the experimental values, a series of half-scale models were constructed. Results of flexural tests performed on three composite members are presented in this report. Instrumentation of each test member was designed to measure deflection, strain, slip between the two concrete portions, and top slab separation. Model test results were compared to test results from three full-scale members tested previously. In general, model members predicted the behavior of full-scale members adequately and reasonable agreement was observed between the predicted values and the actual full-scale test data.

  • Record URL:
  • Corporate Authors:

    University of Missouri, Columbia

    Department of Civil Engineering
    Columbia, MO  United States  65211

    Missouri State Highway Department

    State Highway Building
    Jefferson City, MO  United States  65101

    Bureau of Public Roads

    Washington, DC  United States 
  • Authors:
    • Salmons, John R
    • Mokhtari, Shahrokh
  • Publication Date: 1961


  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 119p

Subject/Index Terms

Filing Info

  • Accession Number: 01734794
  • Record Type: Publication
  • Report/Paper Numbers: MCHRP Report 68-9
  • Created Date: Mar 24 2020 3:18PM