SAFETY AND THE PROBABILITY OF STRUCTURAL FAILURE

APPLIED LOADS ARE EXAMINED AS ARE THE PROBABILITIES OF UNSERVICEABILITY AND FAILURE. IT IS SHOWN THAT THESE TWO ITEMS ARE EQUALLY AS IMPORTANT AS THE STRESS ANALYSIS. THE INFORMATION REQUIRED FOR AN INTEGRATED ANALYSIS WHICH PRODUCES A RATIONAL VALUE FOR THE SAFETY OF THE STRUCTURE RELATED TO ACCEPTABLE PROBABILITIES OF FAILURE ARE THE DISTRIBUTION FUNCTIONS OF THE INTENSITY OF AN APPLIED STANDARD LOAD AND OF THE STANDARD-LOAD INTENSITY PRODUCING, RESPECTIVELY, STRUCTURAL FAILURE AND UNSERVICEABILITY BOTH PRESENTED IN A FORM WHICH JUSTIFIES EXTRAPOLATION TOWARD HIGH VALUES OF THE APPLIED LOAD AND LOW VALUES OF THE FAILURE AND UNSERVICEABILITY LOADS. BECAUSE STRUCTURAL FAILURE IS USUALLY ASSOCIATED WITH OR PRECEEDED BY SUBSTANTIAL INELASTIC DEFORMATION, INELASTIC ANALYSIS OF THE CARRYING CAPACITY SHOULD REPLACE THE ELASTIC-STRESS ANALYSIS IN THE COMPUTATION OF THE PROBABILITY OF FAILURE, WHEREAS ELASTIC-STRESS ANALYSIS IS IN MOST CASES SUFFICIENT TO DETERMINE THE PROBABILITY OF UNSERVICEABILITY. EXISTING DATA SUGGEST THAT EITHER THE LOGARITHMIC-NORMAL OR THE EXTREME- VALUE DISTRIBUTION FUNCTIONS REPRESENT ACTUAL LOAD AND STRENGTH DISTRIBUTIONS FAIRLY WELL SO THAT THEY CAN BE USED IN THE ANALYSIS OF THE PROBABILITY OF FAILURE AND OF THE SAFETY OF STRUCTURES. PROCEDURES ARE OUTLINED FOR THE NUMERICAL EVALUATION OF FACTORS OF SAFETY WHICH ARE BASED ON THE EXPECTED VARIATION OF LOADINGS AND OF STRENGTH PROPERTIES OF STRUCTURAL MATERIALS, TOGETHER WITH THE ECONOMIC ASPECTS INVOLVED.

  • Supplemental Notes:
    • Vol 121, PaPER NO 2843, PP 1337-1397, 11 FIG, 49 REF, 1 APP
  • Authors:
    • Freudenthal, A M
  • Publication Date: 1956

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00208526
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 14 1994 12:00AM