Hyperbolic Paraboloidal Umbrella Shells under Vertical Loads


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Title: Hyperbolic Paraboloidal Umbrella Shells under Vertical Loads

Author(s): Howard P. Harrenstien

Publication: Journal Proceedings

Volume: 57

Issue: 10

Appears on pages(s): 385-402

Keywords: none

Date: 10/1/1960

Tests were erformed on two reinforced concrete hyperbolic para go loidal umbrella shells. The shells were subjected to a concentrated load at various selected points an d resulting strains were observed. Stresses correspond- ing to these strains were determined, and the results are presented in the form of stress contours for each of nine selected load points. Superposition methods are presented which will predict the final stresses in an appropriate umbrella shell when it is subiected to any vertical loading provided the stresses remain within the’ proportional limit, and provided that deflections are small.