The present paper presents an effective evaluation method for elasto-plastic buckling loads of elliptic paraboloidal lattice domes for roof on a rectangular plan. The roofs are assumed as three way of single layer with a pin-support or a simple-support at all peripheries on a rectangular plan. The buckling loads are evaluated using a simple procedure adopting a linear buckling analysis, a knockdown factor for imperfection sensitivity, and column buckling strength for axial forces in terms of a generalized slenderness proposed in ordinary recommendations.
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