Earthquakes have the potential to cause the greatest damage, among the other natural hazards. Earthquakes are perhaps the most unpredictable and highly destructive of all the natural disasters. Structures are subjected to different earthquake loading, behave differently with diversification in dense, medium and soft soil. Soil properties get affected drastically as seismic waves pass through a soil layer. When a structure is subjected to an earthquake excitation, it interacts with the foundation and soil, and thus changes the motion of the ground. It means that the movement of the whole ground structure system is influenced by type of soil as well as by the type of structure. In this study, different soil strata, rigid and flexible base were considered and corresponding base shear and lateral displacement were determined with variation in floors such as G+7, G+8 and G+9and Zones 3, 4 and 5. IS 1893: 2002 “Criteria for Earthquake Resistant Design of Structures” gives response spectrum for different types of soil such as hard, medium and soft. A building was modelled using ETABS -2013 having different Winkler’s springs as its foundation corresponding to different soil properties.

M Anirudh

Papers

Seismic analysis of r.c building with fixed and flexible base under different soil conditions