Effect of Compressive Reinforcement on the Plastic Flow of Reinforced Concrete Beams

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Title: Effect of Compressive Reinforcement on the Plastic Flow of Reinforced Concrete Beams

Author(s): G. W. Washa and P. G. Fluck

Publication: Journal Proceedings

Volume: 49

Issue: 10

Appears on pages(s): 89-108

Keywords: no keywords

Date: 10/1/1952

Abstract:
Presents test results obtained during 2 1/2 years of sustained loading of 34 reinforced concrete beams. Thirty of the beams were made with sand-gravel concrete containing Type 1 portland cement. Three conditions of reinforce-ment were investigated in each of five different beam sizes. One-third of the beams had only tensile steel, one-third had tensile steel plus an equal amount of compressive steel, and one-third had tensile steel plus one-half as much compressive steel. Strain measurements at the levels of the compressive and tensile reinforcement and deflection measurements provide a clear picture of the beneficial effect of compressive reinforcement in reducing excessive plastic flow. Four additional beams were made with only tensile steel. Two of the beams were made with sand-gravel concrete containing Type 1A cement and two with a lightweight expanded slag aggregate concrete containing Type 1 cement. These four beams were included in the test program to provide preliminary informaticn regarding the influence of entrained air and one type of lightweight aggregate on the plastic flow of reinrorced concrete beams.