Significance of Clause 24.2 of I.S. Code 456: 2000-Assumption of Substitute Frame

For the good design of any structure, it is very essential to first analyze it unerringly. Here my interest is with reinforced cement concrete framed structure. In my country, for the design of reinforced cement concrete framed structure buildings we adopt I.S. 456. As per clause 22 of I.S. 456:2000 ?All structures may be analyzed by the linear elastic theory to calculate internal actions produced by design loads?. Instead of rigorous elastic analysis, a simplified analysis as given in clause 22.4 for frames and as given in clause 22.5 for continuous beams may be adopted. The present work is carried out to check the significance of these assumptions mention in the code, when I analyze with substitute frame assumption. Here, we do the analysis as per clause 22.4 (with moment distribution method).