Evaluation of the Stress-Strain Curve of Concrete in Flexure Using Method of Least Squares

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Title: Evaluation of the Stress-Strain Curve of Concrete in Flexure Using Method of Least Squares

Author(s): Reginald G. Smith and Cornelius O. Oragun

Publication: Journal Proceedings

Volume: 66

Issue: 7

Appears on pages(s): 553-559

Keywords: beams (supports) ; computers; concretes; flexural strength; least squares method;moment- curvature relationship;moments;prestressed concrete; reinforced concrete;statically indeterminate structures;stress-strain diagram;structural analysis.

Date: 7/1/1969

Abstract:
An analysis is developed for the determination of the compressive stress-strain curve of concrete in flexure. The method is based on using a "least squares" fit of a polynomial expression to experimental data from reinforced stressed is shown or pre-concrete beam tests. It that the method gives better correlation with experimentally measured moments than the finite difference analysis and can be easily adapted to the computer.