Published Paper Details:

Open Ground Storey or soft Storey are the framed buildings where the ground Storey is kept open without infill walls, mainly to facilitate parking, which is increasing commonly worldwide. However, threat of this type of buildings has been exposed a lot in past earthquakes. OGS buildings are normally designed by a bare frame analysis that ignore the stiffness of the infill walls present in the upper storey, but doing so underestimates the inter-storey drift (ISD) and thereby the force demand in the ground storey columns located. Therefore, a multiplication factor (MF) is introduced in various national and international codes to estimate the design forces (BM and SF forces) in the ground Storey columns. This study focuses on the seismic performance of typical OGS or also called as soft storey buildings designed by means of MFs. As soft storey buildings are not safe, to ensure safety against seismic forces of multi-storied buildings, there is need to study the seismic analysis to design earthquake resistance structures. In seismic analysis the response reduction was considered for two cases i.e. for Ordinary moment resisting frame and Special moment resisting frame. The main objective of this paper is to study the seismic analysis of medium rise structure for static and dynamic analysis in ordinary moment resisting frame (OMRF) and special moment resisting frame (SMRF). We considered a residential building of G+7 storey for the seismic analysis and is located in seismic zone III. The total structure was analyzed by computer with using STAAD.PRO V8i software. We observed the response reduction of ordinary moment resisting frame and special moment resisting frame values with deflection diagrams in seismic analysis. The special moment of resisting frame structure is good in resisting the seismic loads.