THERMAL STRESSES IN COMPOSITE BRIDGES ACCORDING TO BS 5400 AND EC 1

Design engineers evaluate accurately dead and live loads acting on bridges. However, in the case of thermal loads, the bridge designer bases the assessment of these loads on his experience and on codes of practice. In this paper the stress effects of the temperature distributions recommended in BS 5400 (1978) and EC 1 (1995) are determined for a box girder and a double plate composite bridge deck. These are compared with the stress effects corresponding to temperature distributions obtained from the theoretical two-dimensional time-dependent thermal and structural analysis of composite bridges. The study shows that the design temperature distribution recommended in BS 5400 represents the phenomenon of heat transfer in composite bridges realistically. The linear temperature distribution recommended in EC 1, however, does not allow such a precise representation of the actual stress effects of the temperature field in composite bridges. The significance of inaccuracies in the calculation of thermal stress effects is also discussed. (A)

• Corporate Authors:

  Thomas Telford Limited

  London,   United Kingdom 
• Authors:
  • MIRAMBELL, E
  • COSTA, J
• Conference:
  • PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS: STRUCTURES AND BUILDINGS
• Publication Date: 1997-8

Language

• English

Media Info

• Features: References;
• Pagination: p. 281-29
• Serial:
  • Volume: 122
  • Issue Number: 3

Subject/Index Terms

• TRT Terms: Box girders; Bridge decks; Bridges; Composite structures; Standards; Stresses; Temperature
• ITRD Terms: 3474: Box girder; 3482: Bridge deck; 3464: Composite bridge; 187: Specification (standard); 5575: Stress (in material); 6722: Temperature
• Subject Areas: Bridges and other structures;

Filing Info

• Accession Number: 00741089
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Oct 30 1997 12:00AM