THE STRUCTURAL DESIGN OF CONCRETE PAVEMENTS - PART 3 - A STUDY OF CONCRETE PAVEMENT CROSS SECTIONS

HISTORY IS REVIEWED OF THE DESIGN OF CROSS SECTIONS FOR CONCRETE PAVEMENTS. EDGE THICKENING AND LONGITUDINAL JOINTS HAVE BEEN GENERALLY ADOPTED AND THE PRESENT SLAB LENGTHS ARE MUCH LESS THAN THOSE FORMERLY USED. IF LOADS ALONE ARE CONSIDERED, THE MAXIMUM ECONOMY IN THE USE OF MATERIAL IS OBTAINED WITH A THICKENED-EDGE CROSS SECTION. INCREASED EDGE THICKNESS RESULTS IN A REDUCTION OF THE EDGE STRESSES FROM APPLIED LOAD BUT ALSO CAUSES AN INCREASE IN THE EDGE STRESSES UNDER CERTAIN CONDITIONS OF RESTRAINED WARPING. SINCE A BALANCED CROSS SECTION SHOULD IN ALL CASES BE DESIGNED ON THE BASIS OF COMBINED LOAD AND WARPING STRESSES, ECONOMY DEMANDS THAT THE STRESSES RESULTING FROM WARPING BE LIMITED TO LOW VALUES. THE MOST PRACTICAL WAY OF DOING THIS IS BY CONSTRUCTING SHORT PAVEMENT SLABS. IN SHORT SLABS THE CROSS SECTION MAY BE DESIGNED ON THE BASIS OF LOAD ALONE. A BALANCED CROSS SECTION FOR LOAD STRESSES IS OBTAINED WITH A DESIGN GIVEN. EDGE THICKENING STRENGTHENS SLAB CORNERS REGARDLESS OF THE LENGTH OF THE SLAB.

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  • Accession Number: 00205585
  • Record Type: Publication
  • Files: NTL, TRIS
  • Created Date: Jun 10 1994 12:00AM