Field Test and 3D FE Modeling of Decked Bulb-Tee Bridges

This paper summarizes field-testing of eight decked bulb-tee girder bridges as well as development of three-dimensional finite-element (FE) models. Using the calibrated 3D FE models, parametric studies have been performed to study the effect of shear connectors and intermediate diaphragms on live-load distribution and connector forces. It was found that: (1) in all cases studied, the live-load distribution factor (DF) for a single-lane loaded bridge was smaller than one for a double-lane loaded bridge; (2) connector forces caused by wheel loads were not uniform along the longitudinal joint—adding intermediate diaphragms tended to reduce the difference among horizontal shear forces in connectors; (3) the maximum horizontal shear force increased with the increase of the connector spacing—intermediate diaphragms reduced the maximum horizontal shear force in connectors; (4) the maximum vertical shear force and in-plane normal tensile force in connectors do not necessarily increase with the increase of the connector spacing; and (5) the summation of connector forces in each direction along the longitudinal joint remained constant irrespective of the number of connectors in the joint.

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  • Authors:
    • Ma, Zhongguo (John)
    • Chaudhury, Sanjay
    • Millam, Jason L
    • Hulsey, J Leroy
  • Publication Date: 2007-5


  • English

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  • Accession Number: 01051520
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 9 2007 10:40AM