Comparative study of reinforcement requirements for rc building subjected to static and dynamic loading

It is the responsibility of structural engineers to ensure the built environment that can withstand extreme dynamic actions, such as wind, traffic or earthquake. Structural engineers must understand how the built environment will respond to such dynamic actions. In essence an earthquake resistant structure has to resist the lateral inertial forces in a safe and reliable manner. A structure has to be designed to resist the lateral actions applied to it by the earthquake ground motion. The main objective of this study is to understand the requirement of reinforcements for static and dynamic loading on the structure. Here the analysis is carried out for two models with uniform column size for whole building height i.e 450X450mm and two models with varying column size from bottom to top storey i.e from 400X400mm to 300X300mm varying 50 mm per two stories. The analysis and design is carried out using the standard & convenient software package ETABS 2015 and manual designs are carried out to validate the reinforcement obtained from the software. It is observed that the reinforcement required for beam reinforcement required for dynamic behaviour is 5.3% more than that required for static loading of structure. It is also observed that the reinforcement required for columns for dynamic loading is 27.3% more than that required for static loading. In case of footings the reinforcements are 3% more for dynamic loading than static loading if structure is provided with varying column size from bottom to top storey and 5% more if structure is providing with uniform column size for entire structure.