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Vol. 39 (1998) No. 2 April n. 127


Analysis of critical and postcritical states of pin-jointed double-layer space grids fitted to surfaces of double curvature

< Table of Contents for Vol. 39 (1998) No. 2 April n. 127
  • Journal Name: Journal of the International Association for Shell and Spatial Structures (J. IASS)
  • ISSN: (Electronic Version) 1996-9015
  • ISSN: (Print Version) 1028-365X
  • Issue: Vol. 39 (1998) No. 2 April n. 127
  • Title: Analysis of critical and postcritical states of pin-jointed double-layer space grids fitted to surfaces of double curvature
  • Author(s): J. Szab√≥, T. Tarnai
  • Keywords: analysis, doble curvature, grid
Abstract
In the paper a procedure is presented to analyse pin-jointed double-layer space frames fitted to a surface of double curvature. The change of state of the structure under continuously increased one-parameter load of arbitrary arrangement is described up to the first occurrence of buckling of bar(s). The force in the buckled bars, with good approximation, is considered constant, and the load can be increased further, while additional bars buckle. The redundancy, and so the whole stiffness, of the structure decreases with the increase of the number of the buckled bars. The procedure traces numerically the change of state under a continuous increase of the load until redundancy ceases completely, and any additional bar buckling makes the structure a mechanism causing partial or complete collapse of the space frame.

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