Accession Number : AD0645586

Title :   THE SECOND-ORDER ELASTIC ANALYSIS OF PLANE RIGID FRAMES.

Descriptive Note : Interim rept. Oct 64-Nov 65,

Corporate Author : LEHIGH UNIV BETHLEHEM PA FRITZ ENGINEERING LAB

Personal Author(s) : Harrison,H. B.

Report Date : NOV 1965

Pagination or Media Count : 62

Abstract : A computer program is described which will carry out both a first-order and a second-order elastic analysis of plane rigid frames. The program will accept data describing a frame in terms of its joint coordinates, member properties and connections together with the loads for which an anlysis is required. A sequence of load sets can be analyzed so that it is possible to use the results to compute the elastic stability load for a frame. In the second order analysis, account is taken of the change in flexural stiffness of a member caused by axial load and in addition, the equilibrium equations are formulated for the deformed shape of the frame. The analysis is based on the displacement method using matrix techniques with the second order solution obtained by an iterative process. The frame size that can be handled by the program is a function of the store capacity available in any computer and the program limitations in this regard are discussed in detail. The program is in the Fortran language and was developed to aid in the computation of frame strengths in a study of the economics of using high-tensile steel in rigid structures. (Author)

Descriptors :   (*STRUCTURES, STRUCTURAL PROPERTIES), (*COMPUTER PROGRAMS, *STRUCTURAL PROPERTIES), ELASTIC PROPERTIES, STEEL, LOADS(FORCES)

Subject Categories : Computer Programming and Software
      Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE