LINEAR HEAT-FLOW AND THERMAL STRESS ANALYSIS OF CONCRETE BRIDGE DECKS

The report describes a computer program, multitherm, for the linear heat flow and thermal stress analysis of concrete bridge decks. Using the program the influence of various parameters such as section shape, wind speed, ambient temperature and blacktop thickness, on the thermal response of concrete bridges is investigated. On the basis of conservative thermal conditions, a new design gradient is proposed as a replacement for the sixth power 30 deg C gradient used in New Zealand. The proposed gradient is likely to result in a reduction in the critical soffit tension stresses for continuous prestressed concrete bridges so reducing the required level of prestress with consequential economic advantages. /TRRL/

• Corporate Authors:

  Conterbury University, New Zealand

  Private Bag
  Christchurch, Canterbury,   New Zealand 
• Authors:
  • Preistley, MJN
• Publication Date: 1976-2

Language

• English

Media Info

• Features: Figures; Photos; Tables;
• Pagination: 39 p.

Subject/Index Terms

• TRT Terms: Box girders; Bridge decks; Computer programs; Concrete; Development; Flow; Heat flow; Mathematical models; Prestressed concrete; Structural analysis; Temperature; Tension; Thermal analysis; Thickness; Velocity; Wind
• Uncontrolled Terms: Tensile stress
• Old TRIS Terms: Linear flow; Wind velocity
• ITRD Terms: 3474: Box girder; 3482: Bridge deck; 9013: Development; 6473: Mathematical model; 4796: Prestressed concrete; 8645: Software; 5573: Stress analysis; 7152: Thermal analysis
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00170355
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Res Rept. 7613 Monograph
• Files: ITRD, TRIS
• Created Date: Apr 12 1978 12:00AM