Seismic Strengthening of Brick Masonry with Reinforced Concrete Layer on the Basis of Homogenization Theories

Abstract eng:
Vulnerability of masonry structures to seismic actions has been proved with the experience of last earthquakes. A great number of these structures in Iran are residential buildings, hospitals and schools and their damaging will cause death of so many people. So, today seismic evaluation and strengthening of masonry structures are very crucial. Coating the walls with reinforced concrete layer is a common technique of retrofitting the masonry buildings in Iran but there is not any design guideline for that. In this study, firstly the elastic properties of bare and retrofitted masonry wall that are used in linear evaluation procedures are derived through a developed homogenization method. This approximate homogenization method is very simple to use for any kind of bond pattern and the solution will be in close-form, and also shows very good results in agreement with the homogenization procedures the other authors used. Secondly, the continuum yield surfaces of bare and retrofitted masonry are derived that are used for computing the strength of continuum media in any direction.

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