Comparative damage assessment of irregular building based on static and dynamic analysis

As the world move to the accomplishment of Performance Based Engineering philosophies in seismic design of Civil Engineering structures, new seismic design provisions require Structural Engineers to perform both static and dynamic analysis for the design of structures. However, given that seismic prediction is still far from becoming a reality but, it is necessary to improve the prediction of the seismic behavior of existing structures. This is the reason why studies of Seismic Vulnerability of Buildings have been developed to evaluate the expected damage in the different types of buildings.

In order to evaluate the damage of building, a procedure that compares displacement demands obtained by various methods of analysis, and their displacement capacities is proposed. To achieve this objective, a 20 storey irregular building was modeled, and the displacement demands of model have been obtained, using equivalent static, time history and response spectrum analysis. ELCENTRO and CHI-CHI recorded accelerograms are used to perform time history analysis on building. Finally push over analysis has been done in order to estimate the displacement capacities of building. As a result, the level of damage has been obtained for building, based on each methods of analysis, and then the results are compared with each other.