Seismic Performance of Reinforced Concrete Buildings with Masonry Infill
American Journal of Civil Engineering
Volume 6, Issue 1, January 2018, Pages: 24-33
Received: Sep. 24, 2017; Accepted: Oct. 23, 2017; Published: Jan. 2, 2018
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Authors
Girma Zewdie Tsige, Department of Civil Engineering, Addis Ababa Institute of Technology, Addis Ababa, Ethiopia
Adil Zekaria, Department of Civil Engineering, Addis Ababa Institute of Technology, Addis Ababa, Ethiopia
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Abstract
Unreinforced masonry Infills modify the behavior of framed structures under lateral loads; however, in practice, the infill stiffness is commonly ignored in frame analysis, resulting in an under-estimation of stiffness and natural frequency. The structural effect of hollow concrete block infill is generally not considered in the design of columns as well as other structural components of RC frame structures. The hollow concrete block walls have significant in-plane stiffness contributing to the stiffness of the frame against lateral load. The scope of present work was to study seismic performance of reinforced concrete buildings with masonry infill in medium rise building. The office medium rise building is analyzed for earthquake force by considering three type of structural system. i.e. Bare Frame system, partially-infilled and fully- Infilled frame system. Effectiveness of masonry wall has been studied with the help of five different models. Infills were modeled using the equivalent strut approach. Nonlinear static analyses for lateral loads were performed by using standard package ETABS, 2015 software. The comparison of these models for different earthquake response parameters like base shear vs roof displacement, Story displacement, Story shear and member forces are carried out. It is observed that the seismic demand in the bare frame is significantly large when infill stiffness is not considered, with larger displacements. This effect, however, is not found to be significant in the infilled frame systems. The results are described in detail in this paper.
Keywords
Bare Frame, Infilled Frame, Equivalent Diagonal Strut, Infill, Plastic Hinge
To cite this article
Girma Zewdie Tsige, Adil Zekaria, Seismic Performance of Reinforced Concrete Buildings with Masonry Infill, American Journal of Civil Engineering. Vol. 6, No. 1, 2018, pp. 24-33. doi: 10.11648/j.ajce.20180601.15
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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