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Title: Laboratory Study of a 45-Foot Square Flat Plate Structure

Author(s): Sidney A. Guralnick and Robert W. La Fraugh

Publication: Journal Proceedings

Volume: 60

Issue: 9

Appears on pages(s): 1107-1186


DOI: 10.14359/7893

Date: 9/1/1963

Coordinated experimental and analytical studies of reinforced concrete floor systems were conducted at the University of Illinois and the Portland Cement Association laboratories for the purpose of providing a basis for more rational design methods than those now in use. Ultimately, it is expected that more economical floor systems will result from these improved design methods. The experimental program at the University of Illinois involved testing of one-quarter scale models of various floor systems. To aid interpretation of the one-quarter scale model tests, a flat plate structure constructed at three-quarter scale and 45-ft square was tested at the PCA laboratories. The distribution of moments in the slab found in the tests at service load is compared with values for slab moments obtained by current design methods. Also, the observed behavior at ultimate strength is compared with values for ultimate load predicted by application of the yield-line theory and of a shear strength theory


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