Consideration of Irregularities in Reinforced Concrete Structures

Earthquakes are the most unpredictable and destructive natural phenomena, and it is very hard to save engineering properties from them. In order to avoid structural damage and collapse, the contribution of the lateral load resisting system, the number of stories, and the regularity of the structure must be carefully analyzed and evaluated. Therefore, in this article, all of the irregularities introduced by ASCE/SEI 7-19 were studied using 11 models, one with all of the regular configuration and ten with one irregular configuration, and at the end, all of the maximum storey displacement, maximum storey drifts, diaphragm max over average drifts, and stability index of the ten models were compared with the regular model for a better understanding of the behaviour of the irregularity in a structure. The result marks the conclusion that most of the irregularities had various outcomes compared to the regular model. The most unexpected result was with the mass irregularity model, that the structure behaviour got better with the mass irregularity on the top floor.