COMPUTER EXPERIMENTS ON ENVIRONMENTALLY INDUCED STRESSES IN UNREINFORCED CONCRETE PAVEMENT SLABS

The paper is concerned with the computation of deflections and stresses in an unreinforced concrete pavement slab subjected only to the effects of temperature and humidity. The basis of the computer simulation is presented in three stages: (a) the histories of material properties and environmental variables; (b) the computation of the distributions of imposed thermal and shrinkage strains through the depth of the slab, using finite difference techniques; (c) the computation of the lift-off of the slab and the consequent stresses, using finite element techniques. It is shown that by far the largest tensile stresses are induced if there is external restraint of the longitudinal movement of the slab. Stresses significant enough to threaten tensile failure of the concrete can also occur (in the absence of restraint) as a result of the early effects associated with the heat of hydration of the cement, and under the influence of the long-term shrinkage. Computer experiments are reported in which the influences of a number of variables are examined, including those for slab dimensions, climatic changes and the curing of the concrete. /Author/TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00249831
• Corporate Authors:

  Cement and Concrete Association

  Wexham Spring
  Slough SL3 6PL, Buckinghamshire,   England 
• Authors:
  • Illston, J M
  • Tajirian, A
• Publication Date: 1977-12

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 175-190
• Serial:
  • MAGAZINE OF CONCRETE RESEARCH
  • Volume: 29
  • Issue Number: 101
  • Publisher: Thomas Telford Limited
  • ISSN: 0024-9831

Subject/Index Terms

• TRT Terms: Concrete; Concrete curing; Concrete pavements; Deflection; Deformation; Digital computers; Finite element method; Humidity; Hydration; Moisture content; Pavements; Shrinkage; Simulation; Slabs; Stresses; Temperature; Tension; Weather
• Uncontrolled Terms: Tensile stress
• Old TRIS Terms: Pavement deflection
• ITRD Terms: 4755: Concrete; 4702: Curing (concrete); 5586: Deflection; 5595: Deformation; 8673: Digital computer; 6490: Finite element method; 7195: Hydration; 5920: Moisture content; 2955: Pavement; 4743: Shrinkage; 3491: Slab; 5575: Stress (in material); 6722: Temperature; 5502: Tension; 2545: Weather
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00174066
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Jun 28 1978 12:00AM