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Structural Research Series 422PDF


Title:Strength and Behavior of Thick Walled Reinforced Concrete Conduits
Author(s):Ruzicka, G.C.; Gamble, W.L.; Mohraz, Bijan
Subject(s):Reinforced concrete -- Testing
Abstract:The results of tests of 8 three-opening reinforced concrete conduits desi9ned for soil loadings of 30 k/ft2 are presented and discussed. The test specimens were 3/8 scale models of prototype designs, and were constructed with conventional deformed bars and concrete with l-in. aggregate. The clear span-depth ratios in critical members ranged from 2.5 to 5.6. External loads were applied in both vertical and horizontal directions simultaneously, so that significant thrusts were acting in all members in addition to the bending and shear forces. Failure loads ranged from 82.5 to 150 k/ft2 vertical load for members with span-depth ratios of 4.0 or less. Horizontal loads of 60 to 75 k/ft2 produced failures in members with span-depth ratios of 5.6. All members failed in shear. A lower bound to the test data was suggested as a function of If~, the span-depth ratio, and the longitudinal compression acting on the member. No strong influence of the reinforcement ratio was found. When other test results were compared, there did not appear to be a strong influence of the moment-shear ratio as expressed by the variable Vd/M.
Issue Date:1976-05
Publisher:University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report:Civil Engineering Studies SRS-422
Genre:Technical Report
Sponsor:Corps of Engineers, U.S. Army.
Contract No. DACW-73-72-C-0065
Date Available in IDEALS:2009-09-29
Identifier in Online Catalog:668143

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