Seismic Evaluation of 4-Story Reinforced Concrete Structure by Non-Linear Static Pushover Analysis

Abstract

With the immense loss of life and property witnessed in the last couple of decades alone in India, due to failure of structures caused by earthquakes, attention is now being given to the evaluation of the adequacy of strength in framed RC structures to resist strong ground motions. A 50-year old four story (8-bay & 3-frame) RC structure has been considered in this study for pushover analysis, which lies in Zone II, according to IS 1893:2000 classification of seismic zones in India. Inelastic static analysis, or pushover analysis, has been the preferred method for seismic performance evaluation due to its simplicity. It is a static analysis that directly incorporates nonlinear material characteristics. The extent of damage experienced by the structure at the target displacement is considered representation of the damage that would be experienced by the building when subjected to design level ground shaking.