Non Linear Time History Analysis of Irregular Shaped Building

Earthquake considerations are vital in the design of every structure. Many researchers have reported research works aiming to understand the impact of structures with various irregularities. This study focuses on the behavior of structures with irregularities and compares G+20 models of regular and irregular structures. The response spectrum analysis method is used for analysis, and all structures are assumed to be in Zone V with medium soil type. The ground motion data of the El-Centro earthquake in 1940 is used for the study. The analysis is conducted using the Etabs software. The study examines the structures' responses to ground motion in terms of story displacement, story drift, and base shear. The responses of each type of building are studied and compared. The results indicate that ground motions with low-frequency content have a significant impact on both regular and irregular reinforced concrete structures. It is observed that irregularly shaped structures lead to an increase in displacement, drift, story acceleration, time-period, and member forces, while reducing the base shear. This study suggests that when planning for earthquakes, irregularly shaped structures require extra attention to avoid further losses.