Effect of Masonry Infill Materials on Dynamic Characteristics of Buildings
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Date
2019-06
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Addis Ababa University
Abstract
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.
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Keywords
Infill Materials, Response Spectrum Analysis, accidental eccentricity