Structural Engineering

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Effect of Masonry Infill Materials on Dynamic Characteristics of Buildings
(Addis Ababa University, 2019-06) Desalegn, Bogale; Shifferaw, Taye (PhD)
Modern codes for earthquake resistant building design require consideration of the so-called accidental design eccentricity, to account for torsional response caused by several factors not explicitly considered in design. This provision requires that the mass centers in the building floor be moved a certain percentage of the building‟s dimension (usually 5%) along both the x and y axes and in both positive and negative directions. This thesis addresses the influence of infill wall on the response of building structures subjected to earthquake ground motions. Furthermore, the increase an equivalent additional eccentricity due to the action of infill wall is estimated. For this purpose, G+10 Reinforced Concrete (RC) models with infill wall type HCB A are used in the study. To study the effect of infill materials on accidental eccentricity, Response spectrum analysis performed using ETABS 2017 on a set of three-dimensional reinforced concrete multi-story buildings with irregular arrangement of infill wall. The obtained results shows The estimated equivalent additional eccentricity of the studied cases exceeded the value of 5% of the dimension of the floor (D) perpendicular to the excitation axis which is recommended by several seismic code as an accidental eccentricity.