Minimum Reinforcement in Concrete Members [microform]

Download or read book Minimum Reinforcement in Concrete Members [microform] written by Oskar Valdimarsson and published by National Library of Canada. This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty-six beams and slabs, with reinforcement ratios ranging from 0.08% to 0.59%, were tested to study the minimum amount of flexural reinforcement required in concrete beams. The major variables considered were: concrete strength, steel percentage, steel properties and cross-section shape. Slabs and rectangular, T- and inverted T-beams were tested. Four of the beams failed in a brittle or nearly brittle manner; the remaining 22 members having a ductile failure. Based on the test data it is proposed that the minimum reinforcement ratio be expressed as a function of both the compressive strength of concrete and the yield strength of the reinforcing steel. The T-beams and the inverted T-beams (flange in tension) required about 1.4 times and 2.8 times, respectively, as much reinforcement as the rectangular shapes.