INFLUENCE OF THE STRESS RATIO ON THE FATIGUE DESIGN OF CONCRETE PAVEMENTS

INFLUENZA DEL RAPPORTO DI SOLLECITAZIONE SUL DIMENSIONAMENTO A FATICA DELLE PAVIMENTAZIONE IN CALCESTRUZZO

It is experimentally established that the fatigue strength of concrete depends on the magnitude of variation between the maximum and minimum stress values applied in a load cycle. To define test conditions in these terms reference is made to a stress value r, derived from the ratio between the maximum and minimum values. Most fatigue laws used in pavement design are based on tests conducted with R approximately equal to 0. This however does not correspond to the effective stress conditions of a concrete pavement in service, since the traffic induced stresses are additional to existing stresses caused by temperature, for which the effective stress cycle ratio r is generally different to 0. This paper presents a fatigue law for the design of concrete pavements which takes account of these considerations. (TRRL)

• Corporate Authors:

  Societa Autostrade

  Via Antonio Nibby 10
  00161 Rome,   Italy 
• Authors:
  • Domenichini, L
  • MARCHIONNA, A
• Publication Date: 1982-10

Language

• Italian

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 11-20
• Serial:
  • AUTOSTRADE
  • Volume: 24
  • Issue Number: 10

Subject/Index Terms

• TRT Terms: Concrete; Concrete pavements; Design load; Fatigue (Mechanics); Fatigue strength; Loads; Pavement design; Rigid pavements; Stress ratio; Stresses
• ITRD Terms: 4755: Concrete; 5579: Fatigue (mater); 5567: Load; 3055: Pavement design; 2964: Rigid pavement; 5575: Stress (in material)
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00380450
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Jan 30 1984 12:00AM