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The Effect of Core Eccentricity on the Structural Behavior of Concrete Tall Buildings



Author(s)

Tarek Anwar Taha Awida

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DOI:10.17265/1934-7359/2024.03.002

Civil and Architecture Engineering Department, College of Engineering, International University of Kuwait (IUK), Ardiya Government Area, Kuwait

The main purpose of this paper is to investigate the effect of core eccentricity on the structural behavior of concrete tall buildings. Concrete buildings of 55 floors with plan dimensions 48.0 × 48.0 m² were investigated. Three cases of main core locations are studied: centric (A), eccentric by one sixth (B) and one third (C) of building width. The three-dimensional finite element method has been used in conducting structural analysis through ETABS software. Gravity and lateral (wind and seismic) loadings are applied to all building cases. It has been concluded that the core location is the prime parameter governing the structural behavior of tall buildings. Although the first two cases (A, B) have acceptable and similar structural behaviors conforming to code limits, in the third case (C), the building behavior came beyond code limits. The author introduced remedial action by adding two secondary cores in the opposite direction of the main core (C-R) to restore the building behavior to the code limits. The results of this action were satisfactory.

Concrete tall buildings, core eccentricity, structural behavior, gravity, wind, seismic loadings.

Journal of Civil Engineering and Architecture 18 (2024) 112-117 doi: 10.17265/1934-7359/2024.03.002