Effects of Plan Irregularities of Multi-Storeyed Structure Resting on Sloping Terrain with Soil Structure Interaction

Abstract

Abstract: Structures resting on sloping ground are highly vulnerable to earthquakes due to irregularities in plan and elevation. Structures are often analysed under earthquake loadings, without considering the effect of soil–structure interaction (SSI).In the present study the irregular G+4 storey structure has resting on sloping terrain. The influence of the soil structure interaction in the dynamic behaviour of the structure is reflected in an increase in the vibration period as well as increase in the system damping in comparison with the fixed-base model, which does not consider the supporting soil. 4 types of sloping angles are considered in the present study. The considered structure have been modelled and analysed in ETAB2016 software. The considered building has been subjected to earthquake forces. Non linear time history method is considered to perform on structures models. Performing soil structure interaction for all three types of soil Hard, Medium and Soft by applying point spring at the footing. The design and analysis of structure is carried out in ETABS2016 and calculation of spring constants are carried out manually with standard data of it. Keywords: Multi storied RC structures, Plan irregularities, Sloping Terrain, Soil Structure Interaction(SSI), Non linear Time History Method(NLTHM)