Accession Number : AD0710689

Title :   STRUCTURAL ANALYSIS, FRAILTY EVALUATION AND REDESIGN. VOLUME I. SAFER THEORETICAL BASIS.

Descriptive Note : Technical rept. 15 May 68-30 Jan 70,

Corporate Author : PHILCO-FORD CORP PALO ALTO CALIF WESTERN DEVELOPMENT LABS

Personal Author(s) : Melosh,R. J.

Report Date : JUL 1970

Pagination or Media Count : 97

Abstract : The report defines the equations upon which the SAFER computer program is based. Mathematical models of a line and a flat triangular surface element are given. These models are suitable for predicting responses of structures with linear behavior. Stiffness models are given for evaluating deflections; cross section models for stress. Transformations provide for simulating element connections at other than their neutral surfaces. A modified Gauss decomposition process is selected for solving the load-deflection equations of structures. Checks are given to identify kinematic instability, numerical singularity, and inaccuracy in stress predictions; all in association with the solution process. A general, direct, and exact procedure is delineated for determining the response of the structure if an element is removed or changed in size. The removal process is prescribed for predicting the fail-safety factor of a structure. It includes a check to evaluate kinematic stability when each element is removed. (Author)

Descriptors :   (*STRUCTURAL PROPERTIES, COMPUTER PROGRAMMING), MATHEMATICAL MODELS, STRESSES, LOADS(FORCES), BEAMS(STRUCTURAL), RODS, PIPES, METAL JOINTS, STABILITY, DESIGN, VULNERABILITY, ITERATIONS, OPTIMIZATION

Subject Categories : Structural Engineering and Building Technology
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE