The Structural Engineer > Archive > Volume 47 (1969) > Issues > Issue 8 > Local Instability Analysis of Triangulated Dome Frameworks
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Local Instability Analysis of Triangulated Dome Frameworks

With the growing importance of the light, metallic, reficulated dome as a structural form, the need for improved stability criteria is emphasized. For elastic, single-layer dome frameworks of the regular triangulated, reticular type an analysis is made of both local buckling and local snap-through instability. The critical constants are found to be functions of a single geometric characteristic parameter of the dome that corresponds to the effective slenderness ratio for columns. The buckling analysis can be generalized to cover the inelastic range by use of the tangent modulus, but it is shown that this bifurcation buckling load is of limited usefulness as an index for predicting structural behaviour. An improved criterion of local stability is given in a form suitable for design use, subject to experimental verification. N.C. Lind

Author(s): Lind, N C

Keywords: stability;analysis;domes;steel;aluminium