Purpose-The Second order effects, P-delta analysis in columns is performed by the empirical design method including the discrete action based on first principle, P-M curve, using the computer application program SACD. The purpose of this study is to provide the stability to the columns in a building to the P-delta effects and perform the subsequent ductility checks by SACD. Design/Methodology/approach-The multi-story building structures are mostly analyzed by using the analytical static and Non-linear methods for different response characteristics. The much vulnerability in multi-story buildings is the existence of short columns at specific locations of the building structure. The response characteristics of these columns are evaluated by using non-linear techniques like Response spectrum method, to access the shear capacity of the column to the corresponding dynamic loading conditions. The P-delta analysis of columns of a building is mostly ignored due to the complexity of the method involved. Most researchers have tried to incorporate the P-delta effect in analysis using methods based on iteration process, which is conventional and time consuming. In this study, the SACD computer application algorithm has been used to evaluate the safety of column to the P-delta effects using the P-M curve based on first principle. In this study, the analysis is executed by discrete method based on the first principle, P-M curve. The application of this method is utilized after analyzing the columns by non-linear dynamic analysis, the response spectrum method. Findings- The incorporation of P-delta effect to the analysis process enhances the time- period of the member and it is observed that the mode shapes change significantly as compared to the ones without P-delta effect. The design of columns in the SACD with proposed empirical design method generates much precise and improved response characteristics of structure and overcomes the ambiguity involved in the earlier adopted iterative techniques. Originality/Value- The column system model has been analyzed for the different response characteristics using the computer application SACD bypassing the conventional iterative techniques.

P-Delta Analysis, P-delta effects, Ductility design, System Model Column, SACD, System Modelling, Analysis