TEMPERATURE EFFECTS IN BRIDGES

THE PATTERN OF DIURNAL AND SEASONAL TEMPERATURE CHANGES IN AND MOVEMENTS OF BOTH CONCRETE AND STEEL BRIDGE DECKS HAS BEEN RECORDED. RELATIONS BETWEEN SHADE TEMPERATURE AND MEAN BRIDGE TEMPERATURE HAVE BEEN ESTABLISHED BOTH FOR EXTREME ENVIRONMENTAL CONDITIONS AND AT SPECIFIC TIMES DURING A 24 HOUR PERIOD. OVER A PERIOD OF A YEAR THE RANGE OF MEAN TEMPERATURE EXPERIENCED BY A CONCRETE BRIDGE IS ABOUT 6 DEG C LESS THAN THE RANGE OF SHADE TEMPERATURE, MEASURED OVER THE SAME PERIOD, IN THE SAME AREA. THE CORRESPONDING RANGE OF MEAN TEMPERATURE FOR A STEEL BRIDGE IS FROM ABOUT 3 DEG C BELOW THE MINIMUM SHADE TEMPERATURE TO 1.5 TIMES THE MAXIMUM SHADE TEMPERATURE. A THEORETICAL METHOD HAS BEEN DEVELOPED WHICH ENABLES THE TEMPERATURE GRADIENTS IN STEEL, COMPOSITE, AND CONCRETE BRIDGES TO BE CALCULATED FOR GIVEN ENVIRONMENTAL CONDITIONS OF SHADE TEMPERATURE AND RADIATION. THE RESULTS OF THIS RESEARCH, TO DATE, SHOW THE LIMITATIONS OF THE PRESENT BRITISH STANDARDS ON TEMPERATURE LIMITS, AND SHOULD ASSIST WITH THE REVISION OF SOMT OF THESE LIMITS. /TRRL/

  • Authors:
    • EMERSON, M
  • Publication Date: 1972-7

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Filing Info

  • Accession Number: 00210070
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: TRIS
  • Created Date: Jun 5 1974 12:00AM