Pushover Analysis of Multistory Reinforced Concrete Building

The standard building codes define the significant design requirements to ensure the safety of buildings in a sudden ground movement causing inertial forces in the building. We witness post earthquake effects in many buildings designed as per these codes. Therefore it is important to analyse the building performance before physically constructing it. The performance based design gives you the choice to check the story drift, displacement at the roof level and the capacity before the building fails for certain ground motions. The performance based design ensures the safety for the Design Basis Earthquake (DBE) and Collapse prevention for Maximum Considered Earthquake (MCE). For performance-based seismic design, the performance levels described in ASCE 41, Seismic Rehabilitation of Existing Building (2007), for both structural and non-structural systems are the most Widely-recognized characterizations. These performance levels are Operational Building Performance Level, Immediate Occupancy Building Performance Level, Life Safety Building Performance Level, Collapse Prevention Building Performance Level. Non Linear Pushover Analysis method considers the nonlinear behaviour of the structure which increases the load taking capacity of the building. It also focuses on ductility of the structure by providing plastic hinges. Pushover analysis is applicable to new and existing structures which can be a good method for retrofitting of structures after its design life is over. It considers target displacement and defining objectives whenever the performance meet the objectives then the damage at that performance level is acceptable.