Push-Over Analysis of Reinforced Concrete Buildings with Critical Geometric Irregularities

Mounia Esskely; Hicham Darnif; Essaadia Azelmad; Lahbibe Bousshine

doi:10.15866/irece.v14i3.22465

Push-Over Analysis of Reinforced Concrete Buildings with Critical Geometric Irregularities

Mounia Esskely^(1*), Hicham Darnif⁽²⁾, Essaadia Azelmad⁽³⁾, Lahbibe Bousshine⁽⁴⁾

^(*) Corresponding author

Authors' affiliations

DOI: https://doi.org/10.15866/irece.v14i3.22465

Abstract

This study evaluates the seismic behavior of reinforced concrete buildings with plan and vertical irregularities. Indeed, for their functional and aesthetic advantages, architects are increasingly adopting designs combining irregularity in plan and elevation. However, these irregularities increase the sensitivity of the structures to the torsion phenomenon. This article examines the influence of building irregularities on the seismic behavior of these structures by comparing their performance characteristics to those of a defined regular reference structure. Four three-dimensional models of RC shear moment frame buildings, having the same basic design but presenting different plan and elevation geometric irregularities, have been studied using the nonlinear static method in order to deduce and compare their behavior with respect to seismic excitation. Comparing the capacity diagrams has demonstrated a large decrease in the seismic performance of structure with the presence of geometric irregularity. This decrease is even more significant with the combination of the two types of irregularity.
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Keywords

Building Frames; Capacity Curve; Irregularity; Performance Point; Plastic Hinges; Seismic Vulnerability Assessment

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