TEMPERATURE DISTRIBUTIONS AND STRESSES IN CONCRETE BRIDGES

The paper is intended to give designers an understanding and visual appreciation of the way temperature distributions within bridge decks form and change throughout the day. Any temperature distribution is considered as a superposition of a steady state average heat flow between top and bottom surfaces and an hourly changing variation near the surfaces. Both components are analysed by classic theory of conductivity and can often be sketched by eye. The influences of surfacing and lightweight aggregate concrete are indicated. The paper also demonstrates how the stresses induced by temperature in simply supported and continuous structures can be calculated from the temperature distributions. In concrete bridge decks the temperature-induced stresses depend significantly on how the section is cracked under sagging or hogging moments, or with no moment. The author is not clear about how to combine calculated temperature stresses with other loadings and it is suggested that it may be more rational to consider combination of strains. Temperature effects then appear much less significant for the case considered.(a) /TRRL/

  • Availability:
  • Corporate Authors:

    Institution of Structural Engineers

    11 Upper Belgrave Street
    London,   United Kingdom  SW1X 8BH
  • Authors:
    • HAMBLY, E C
  • Publication Date: 1978-5

Media Info

  • Features: Figures; References;
  • Pagination: p. 143-148
  • Serial:
    • Structural Engineer
    • Volume: 56A
    • Publisher: Institution of Structural Engineers
    • ISSN: 1466-5123

Subject/Index Terms

Filing Info

  • Accession Number: 00178669
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 27 1978 12:00AM