THERMAL GRADIENTS IN BRIDGES - SOME DESIGN CONSIDERATIONS

A THEORY ENABLING LONGITUDINAL TEMPERATURE-INDUCED STRESSES TO BE PREDICTED FOR AN ARBITRARY SECTION SHAPE SUBJECTED TO AN ARBITRARY VERTICAL TEMPERATURE DISTRIBUTION IS DEVELOPED. IT IS EMPHASIZED THAT THE THEORY IS VERY SIMPLE TO APPLY AND COULD BE USED DIRECTLY BY DESIGNING ENGINEERS. A BOX-GIRDER BRIDGE, GIVEN AS AN EXAMPLE IN A SIMPLIFIED DESIGN METHOD IN COMMON USAGE IN NEW ZEALAND, IS ANALYZED UNDER A NUMBER OF DIFFERENT TEMPERATURE DISTRIBUTIONS, SOME OF WHICH ARE FELT TO BE MORE REALISTIC THAN THE CONSTANT TEMPERATURE BLOCK USED AT PRESENT. RESULTS SHOW THAT LOCAL STRESSES ARE VERY SENSITIVE TO THE TYPE OF TEMPERATURE DISTRIBUTION ASSUMED. CURVATURES, AND THEREFORE CONTINUITY EFFECTS, ARE LESS SENSITIVE, BUT STILL EXHIBIT SIGNIFICANT VARIATION. DESIGN TECHNIQUES FOR ESTIMATING TRANSVERSE STRESSES ARE DISCUSSED, AND SOME SECONDARY EFFECTS, INCLUDING BEARING LOADS AND HORIZONTAL TEMPERATURE GRADIENTS, ARE MENTIONED. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0028808X
• Authors:
  • Priestley, M J
• Publication Date: 1972-7

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 228-33
• Serial:
  • NEW ZEALAND ENGINEERING
  • Volume: 27
  • Issue Number: 7
  • Publisher: Institution of Professional Engineers New Zealand
  • ISSN: 0028-808X

Subject/Index Terms

• TRT Terms: Bridge design; Bridges; Structural design; Temperature; Thermal stresses
• Uncontrolled Terms: Temperature distribution
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00210202
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: TRIS
• Created Date: Oct 24 1973 12:00AM