Experimental Investigation of Thin-Steel Hyperbolic Paraboloid Structures

by Peter Gergely, Assoc. Prof.; Struct. Engrg. Dept., Cornell Univ., Ithaca, NY,
George Winter, Prof.; Struct. Engrg. Dept., Cornell Univ., Ithaca, NY,

Serial Information: Journal of the Structural Division, 1972, Vol. 98, Issue 10, Pg. 2165-2179

Document Type: Journal Paper


Extensive tests on inverted umbrella and saddle-shaped models indicate that the design of thin-steel hypar roofs is usually governed by stiffness, rather than by stress limitations. The rise-span ratio and the shear rigidity of cold-formed decks are the most important factors determining the stiffness of the structure. Deck buckling is causd by the uniform shear stresses in the shear-diaphragm type of action of the shell which dominates the response of hypar shells. This experimental investigation yielded empirical design information in thin-steel hypars and also provided checks on other analytical studies.

Subject Headings: Shear stress | Paraboloid | Stiffening | Decks | Roofs | Rigidity | Buckling | Empirical equations

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