Title: Reinforced Concrete Members Subject to Combined Biaxial Bending and Tension

Author(s): Cheng-Tzu Thomas Hsu

Publication: Journal Proceedings

Volume: 83

Issue: 1

Appears on pages(s): 137-144

Keywords: axial loads; bending moments; biaxial loads; computer programs; reinforced concrete; structural analysis; tension.

DOI: 10.14359/1748

Date: 1/1/1986

Abstract:
The research reported studies the ultimate strength behavior of reinforced concrete members subjected to biaxial bending and axial tension. A computer program was developed to study the three-dimensional strength-interaction diagrams and failure surfaces for members under these combined actions. The computed results were compared with other existing analytical results and experimental test results for reinforced concrete members subject to combined uniaxial bending moment and axial tension. Such variables as maximum concrete compressive strength, steel yield strength, and size of cross section were also studied. Based on the computer results and resulting failure surfaces, two design formulas for reinforced concrete members under combined biaxial bending and axial tension are proposed for square and rectangular sections, respectively. These two equations represent two nondimensional design formulas which are a further improvement of the load-contour methods and can be useful for practical design work.