SHAPE FACTORS IN BEARING CAPACITY EQUATIONS

THE EXTENSION OF THE CLASSICAL BEARING CAPACITY EQUATION TO INCLINED LOADS OR TO LOADING A SLOPING SURFACE RAISES THE SHAPE FACTORS ESTABLISHED FOR VERTICAL LOADING AND HORIZONTAL SURFACES REMAIN VALID WHEN THE LOADING IS NOT PERPENDICULAR TO THE SURFACE. CONSIDERATION OF THE DISTRIBUTION OF BEARING STRESSES LEADS TO A REASONABLE METHOD FOR ESTIMATING THE SHAPE FACTOR FOR BEARING AREAS OF ARBITRARY SHAPE AS WELL AS INCLINED LOADING. A RELATIONSHIP IS PRESENTED FOR THE BEARING CAPACITY THEORIES FOR VERTICAL LOADING AND HORIZONTAL SURFACES. THE ROLE OF THE SHAPE FACTORS IS DISCUSSED BY CONSIDERING THE STRESS DISTRIBUTION BENEATH THE LOADING AREA. MEYERHOF HAS SHOWN THAT IN THE CASE OF AXIALLY SYMMETRIC LOADING AND COHESIVE SOIL THE BEARING STRESS IS INCREASED TOWARD THE CENTER OF THE LOADING AREA. TO INVESTIGATE THE EFFECT OF AXIAL SYMMETRY ON THE DISTRIBUTION STRESSES AND BEARING CAPACITY IN THE CASE OF SURCHARGE ONLY, THE SLIP LINE FIELD AND BEARING STRESSES WERE DETERMINED BY NUMERICAL INTEGRATION OF THE DIFFERENTIAL EQUATIONS OF PLASTIC EQUILIBRIUM FOR A WEIGHTLESS AND COHESIONLESS SOIL. THE BEARING STRESSES INCREASE TOWARD THE CENTER. CONSIDERATION OF THE DISTRIBUTION OF BEARING STRESSES LEADS TO A REASONABLE METHOD FOR ESTIMATING THE SHAPE FACTOR FOR BEARING AREAS OF ARBITRARY SHAPE AS WELL AS FOR INCLINED LOADING.

  • Supplemental Notes:
    • Vol 96, No SM4, PP 1493-1497, 1 FIG, 11 REF, 1 APP
  • Authors:
    • Karafiath, L L
  • Publication Date: 1970-7

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Filing Info

  • Accession Number: 00235772
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 5 1970 12:00AM