One side span of the three-span ((200,300,200 m) continuous steel box girder bridge in Rio de Janeiro was instrumented for measuring strains and temperature during construction and in service. Electrical, mechanical, and scratch guages were used. The field measurements, conducted in winter and summer, show that the daily temperature increase is the largest from 6:30 a.m. to 3:00 p.m. The high temperature change in the top flange drops within 0.30 m by as much as 13 to 15 degrees C and then remains essentially constant in the rest of the cross section. A computer program was developed for generating a complete thermal field in the bridge from the temperatures specified at two cross sections and for performing thermoelastic analysis. The highest termal stress was found to be 14.2 MPa. Recommendations are made for a temperature change pattern to be used in design of steel bridges under the Rio de Janeiro conditions and for the intensification of research in the United States on thermal effects in bridge structures. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References;
  • Pagination: pp 43-49
  • Monograph Title: Bridge design, testing, and evaluation
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00157813
  • Record Type: Publication
  • ISBN: 0309025826
  • Files: TRIS, TRB
  • Created Date: Sep 28 1977 12:00AM