Pushover analysis is a method of analyzing the seismic performance of a building or structure by subjecting it to progressively increasing lateral loads until it reaches its ultimate capacity. The analysis is typically performed using non-linear static analysis techniques, which take into account the non-linear behavior of the structure as it approaches failure.
In pushover analysis, the structure is modeled as a series of beam-column elements, and a lateral load pattern is applied to the structure at each level. The load pattern is typically based on a simplified seismic force distribution, such as the one specified in building codes, and is applied incrementally until the structure reaches its ultimate capacity. The analysis considers the deformations and the response of the structure to the applied loads and estimates the displacement and damage levels at different stages of the analysis.
Pushover analysis provides a useful tool for estimating the seismic performance of a building or structure and can be used for seismic design and retrofitting purposes. By using pushover analysis, engineers can identify potential failure modes of the structure, determine the strength and deformation capacity of different elements, and estimate the potential damage and repair costs associated with a seismic event.
However, it’s important to note that pushover analysis has limitations and should be used in conjunction with other analysis methods, such as linear and non-linear time-history analysis, to fully understand the seismic performance of a structure.
