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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Cracking and Bond Resistance in High Strength Reinforced Concrete Beams, Illustrated by Photoelastic Coating
Author(s): Paul W. Abeles
Publication: Journal Proceedings
Appears on pages(s): 1265-1278
Keywords: beam, bond resistance, cracking, crack width, deflection, high strength concrete, high strength steel, microcracking, nontensioned steel, photoelastic coating photostress method, prestressing, reinforced concrete, research.
Abstract:The paper shows the application of photoelastic coating (also called photostress method) to a concrete beam, reinforced with two nontensioned prestressing strands, so as to illustrate micro and visible cracking. Deflections and crack widths at the tensile face and at the level of the steel are shown and photostress pictures are presented at varioous loadings, depicting the cracking during three loading cycles. The effect of an excellent bond between the steel and the high strength concrete is illustrated. A comparison is made with a concrete beam of the same dimensions but reinforced with four nontensioned prestressing wires, with which the bond conditions are quite good but not so excellent as with strands.
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