A COMPARATION OF OMRF BRACED & OMRF NON BRACED RC FRAME CONSIDERING EARTHQUAKE LOADING

With the advancement in field of high rise construction, various types of frame arrangements have been emerged. Regular bare frame, Irregular plaza frame and Irregular stepped frame being examples of the modern high rise types are advantageous in terms of aesthetic and structural functioning. Seismic evaluation will provide a general idea about the building performance during an earthquake. In this study Ordinary Moment Resisting Frame with bracing and Ordinary Moment Resisting Frame are considering as structural frame and comparison are made for seismic load. The objective of this study is to investigate the seismic behaviour of the structure i.e. Ordinary Moment Resisting Frame with bracing (OMRF with bracing) & Ordinary Moment Resisting Frame non braced (OMRF). In this analysis, four different seismic zones are considered as well three different types of structures are used which are bare frame structure, plaza frame structure and stepped frame structure along with two types of moment resisting frames (OMRF Braced and OMRF). Hence, a total of 24 cases had been studied. For this purpose regular and irregular structure were modelled and analysis was done using STAAD.Pro software and using the Indian codes for analysis namely IS 1893:2002, IS 456: 2000. The study assumed that the buildings were located in seismic zone II, III, IV and V. Results in terms of bending moment, shear force, nodal displacement and storey displacement are taken. Relevant conclusions are drawn.