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Meheddene M Machaka

Meheddene M Machaka

Beirut Arab University, Lebanon

Title: Composite shear walls: An efficient seismic resistant system for multi-story buildings


Meheddene M Mashaka is an Adjunct Professor in the Department of Civil and Environmental Engineering at Beirut Arab University and Rafik Hariri University in the field of structural analysis and construction materials. He has received his Bachelor of Science in Civil Engineering in 1992 at BAU, MSc in Structural Engineering in 2005 and PhD degree in 2015 at Beirut Arab University, Lebanon. He is the Technical Manager for United Engineers Office at Beirut city from 1994 to till date and a Faculty Member in the Department of Civil Engineering.


Steel-concrete composite systems have seen widespread use in recent decades because of the benefits achieved by merging the two materials. Due to their high stiffness and lateral load resistance, reinforced-concrete shear walls (RCSW) and steel-plate shear walls (SPSW) are considered ideal for resisting earthquake lateral loads in moderate and high-rise buildings. Recently, various schemes of composite shear walls (CSW) have been the focus of recent research. The objective of this paper is to investigate analytically the behavior of composite shear walls as a lateral-load resisting system in comparison to RCSW. The investigation is performed on buildings with variable heights provided with either (RCSW) or (CSW). Three dimensional models for the case-study buildings are assembled using ETABS, computer software based on the finite element method. The buildings are analyzed for static lateral forces computed by the equivalent static load method (UBC-1997), response spectra dynamic analyses and dynamic time-history linear analyses using IZMIT earthquake record. Results are compared and interpreted so as the major findings include: First, to highlight on the structural characteristics and behavior of composite shear walls as a seismic resistant system. Secondly, to compare between the structural behavior of RCSW and CSW concerning their drifts, base shear and strength.

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