Evaluation of the ultimate strength of R.C. rectangular columns subjected to axial force, bending moment and shear force

• Published in: Engineering structures Vol. 57; pp. 339 - 355
• Main Author: Rossi, P.P.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-12-2013; Elsevier
• Subjects: Applied sciences; Axial force; Bars; Bending moment; Bending moments; Building structure; Buildings. Public works; Construction (buildings and works); Exact sciences and technology; Mathematical analysis; Rectangular cross-section; Reinforced concrete; Reinforced concrete structure; Shear; Shear force; Stresses; Stresses. Safety; Structural analysis. Stresses; Structural steels; Trusses; Ultimate tensile strength; Shear force; Rectangular cross-section; Bending moment; Axial force; Reinforced concrete; Stress analysis; Ultimate strength method; Modeling; Experimental result; Physical model; Column; Concrete construction; Rectangular cross section; Laboratory test; Mathematical model; Computing method; Comparative study; Strength
• ISSN: 0141-0296; 1873-7323
• DOI: 10.1016/j.engstruct.2013.09.006

•The proposed method is based on the application of the static theorem of limit analysis.•The model considers simplified stress fields to simulate stresses of concrete and steel.•The proposed method provides good estimates of the shear strength of columns.•The accuracy does not show any trend with geometrical and mechanical characteristics.•The proposed method is more accurate than existing simplified methods.
This paper describes a mathematical tool for the calculation of the ultimate strength of reinforced concrete rectangular columns subjected to combined internal forces including shear. The proposed method is based on the application of the static theorem of limit analysis and considers simplified stress fields to simulate stresses in steel bars and (unconfined and confined) concrete. Both truss and arch effects are taken into account. To assess the effectiveness of the method, the relations developed are applied with reference to a large number of columns tested in the past by many researchers and a comparison between the theoretical and experimental results is drawn. Finally, the results of the proposed method are compared to others deriving from the application of more simplified methods present in the literature.