MODEL STUDIES OF PRESTRESSED RIGID PAVEMENTS FOR AIRFIELDS

SMALL SCALE MODELS WERE USED TO PROVIDE BASIC INFORMATION CONCERNING THE BEHAVIOR OF PRESTRESSED RIGID PAVEMENTS UNDER VARIOUS CONDITIONS OF LOADING. IN THE MODEL, PROTOTYPE CONDITIONS WERE SIMULATED THROUGH THE USE OF SMALL PRESTRESSED GYPSUM CEMENT SLABS PLACED ON AN ARTIFICIAL SUBGRADE OF NATURAL RUBBER. STATIC LOADS WERE APPLIED BY MEANS OF SINGLE FOOTPRINTS OF VARIOUS SIZES. THE FOLLOWING OBSERVATIONS AND MEASUREMENTS WERE MADE: (1) CRACK PATTERNS AND CRACK DEVELOPMENT FOR VARIOUS CONDITIONS OF LOADING, (2) DEFLECTIONS MEASURED FOR INTERIOR AND EDGE LOADINGS FOR ELASTIC AND ELASTO-PLASTIC CONDITIONS IN THE SLABS, (3) MAXIMUM STRAINS AND STRAIN DISTRIBUTION MEASURED FOR INTERIOR AND EDGE LOADINGS WITHIN THE ELASTIC LIMIT OF THE SLABS, AND (4) ULTIMATE LOAD-CARRYING CAPACITY OF THE SLABS FOR VARIOUS CONDITIONS OF LOADING. WESTERGAARD'S THEORETICAL ANALYSES OF RIGID PAVEMENT BEHAVIOR WAS USED WHERE CRITICAL STRESSES IN THE SLAB AND SUBGRADE REMAIN WITHIN THEIR RESPECTIVE ELASTIC LIMITS. TEST RESULTS SHOW THAT THESE SLABS, WHEN SUBJECTED TO CONTROLLED STATIC LOADINGS, EXHIBIT CHARACTERISTICS BELIEVED TO BE ANALOGOUS TO THOSE OF THE PROTOTYPE. IT IS CONCLUDED THAT THIS TYPE OF TESTING CAN BE A USEFUL AND VALID TOOL FOR INVESTIGATING THE BEHAVIOR OF PRESTRESSED AIRFIELD PAVEMENTS FOR VARIOUS CONDITIONS OF LOADING AND PRESTRESSING.

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  • Accession Number: 00205714
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 16 1994 12:00AM