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Vol. 44 (2003) No. 3 December n. 143


Hangai Prize papers: Dynamic Buckling Behavior of Single Layer Lattice Domes Subjected to Horizontal Step Wave

< Table of Contents for Vol. 44 (2003) No. 3 December n. 143
  • 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. 44 (2003) No. 3 December n. 143
  • Pages: 167-174
  • Title: Hangai Prize papers: Dynamic Buckling Behavior of Single Layer Lattice Domes Subjected to Horizontal Step Wave
  • Author(s): T. Kumagai and T. Ogawa
  • Keywords: Single Layer Lattice Dome, Substructure, Horizontal Step Wave, Dynamic Buckling Behavior, Dynamic Buckling Load
Abstract
The elasto-plastic dynamic buckling behavior of rigidly jointed single layer lattice domes under horizontal step wave has been analytically investigated in this paper. A step wave is a simple one whose response spectrum curve is a horizontal line. Therefore, the buckling behavior of domes under dynamic loads can be easily grasped. The analysis models are rigidly jointed single layer lattice domes with substructure to support the dome (the Full Model) and those without substructure (the Roof Model). External force is a uniform step load which is applied horizontally or vertically to each of the nodes. The analysis method is a dynamic response analysis taking into account the geometrical and material nonlinearities. The Newmark ? = 1/4 method is used for numerical integration scheme and the Rayleigh damping is applied to the dome damping. The dynamic buckling load is determined by the Budiansky-Roth method [1]. From these numerical results, we have examined the time histories of response displacements, the loci of response accelerations, the distributions of axial forces and bending moments and so on. Based on the above examinations, the effects of the boundary condition of dome, substructure and input direction of load on the dynamic buckling behavior will be discussed. Finally we will evaluate the static and dynamic buckling loads of domes.

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