THERMAL RESPONSE OF A CONTINUOUS TWO-SPAN COMPOSITE BRIDGE STRUCTURE

This experimental investigation was conducted to verify and substantiate a prior theoretical study of environmental stresses induced in composite-girder bridge structures. The objectives of the study were (a) to construct and instrument a 4.6- and 4.6-m (15- and 15-ft) continuous two-span laboratory structure of composite design, (b) to subject the structure to thermal loading, and (c) to correlate the experimental temperature distributions, strain distributions, and deflections with those obtained form the theoretical study. Infrared heat lamps were used to obtain steady-state thermal loading. Three theoretical cases were considered for strain calculations: (a) both the slab and the beam in plane stress (b) the slab in plane strain and the beam in plane stress, and (c) the slab in some state between plane stress and plane strain (partially restrained) and the beam in plane stress. The experimental and theoretical temperature distributions, strains, and deflections were in reasonable agreement. It was concluded that the theoretical procedure provides a rational method for predicting the thermal behaviour of composite-girder bridge structures and can be applied with reasonable confidence when used with realistic temperature profiles, material properties, and substructure stiffness characteristics. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 40-46
  • Monograph Title: Probabilistic design, redundancy, and other bridge papers
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00302396
  • Record Type: Publication
  • ISBN: 0309029589
  • Files: TRIS, TRB
  • Created Date: Jan 30 1980 12:00AM