Computational Analysis of Biaxial Bending in Reinforced Concrete Columns
The aim of this paper is to provide a solution for easy calculations of reinforced concrete with biaxial bending cross-section. The paper presents in an orderly manner basic definitions related to the discussed topics, to the extent necessary to understand the discussed issues. As a result of the computational analysis dozens of sections with biaxial bending, there was developed a table and a chart containing the correction factor for bending moments, allowing to obtain the correct bearing capacity of cross-section, subjected to biaxial bending. This work presents proposition for a new, own calculation method of such cross-section. Calculations were made according to PN-EN 1992-1-1:2008, Eurocode 2, Design of concrete structures. Part 1-1: General rules and rules for buildings, using algorithms based on simplified methods. According to carried out calculations, cross-section dimensioning compressed with biaxial eccentricities separately on each side and values of bending moments should be increased to maintain cross-section's bearing capacity. The coefficient K scaling moments was determined as a function of eccentricity ey. With the increase of eccentricity, the coefficient K decreases.