![]() This paper presents a simplified method to analyze and design the irregular reinforced concrete slabs based on structural safety and economy. The obtained results are promising, as the values obtained by the Interaction Charts and the conventional method appear to be in good agreement. The obtained results are compared with a conventional method (ie, the computer software SP‐Column). In addition, this study reports some numerical examples using the proposed interaction charts (Reciprocal as well as the equivalent uniaxial eccentricity method) to find the values of Pc and (Mcx, Mcy) for the columns subjected to biaxial bending. The interaction diagram of any desired level of gamma (γ) can be generated to find the required axial load capacity (Pc) and moment capacity (Mcx, Mcy) of the columns having different reinforcement ratios (ρ). Due to the introduction of new classes in concrete compressive strength (fc') with somewhat different parameters for the steel grades (fy), it has become necessary to develop new interaction diagrams. This paper presents a novel analytical method to generate interaction diagrams useful for the design of reinforced concrete (RC) biaxial columns. The data obtained from Interaction charts showed a promising result as the values are quite close to the ones obtained from the computer software. This study also analyzed some numerical examples using the proposed interaction charts to find the values of Pc and Mc for the uniaxial columns and their results obtained are later compared with the computer software (SP-Column). The interaction diagram of any desire level of gamma (□) can be generated to find the required axial load capacity (Pc) and moment capacity (Mc) of the columns with different reinforcement ratios. These proposed interaction diagrams take into consideration the different values of gamma (□), concrete compressive strength (□□′ ) and different steel reinforcement ratios (ρ). Due to the introduction of new classes in concrete compressive strength (□□′ )with somewhat different parameters for the steel grades (□□), it has become necessary to develop new interaction diagrams. This paper presents analytical method for generating the interaction diagrams for design of reinforced concrete (RC) columns.
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