RCEE Research in Civil and Environmental Engineering www.jrcee.com Research in Civil and Environmental Engineering 2014 2 (01) 11-23 RETROFITTING OF SEISMICALLY DAMAGED MASONRY STRUCTURES USING FRP – A REVIEW S. Saileysh Sivaraja a* , T.S. Thandavamoorthy b a Professor, Department of Civil Engineering, Dr. M.G.R. University, Chennai, India. b Professor, Department of Civil Engineering, Adhiparasakthi Engineering College, Melmaruvathur, India. Keywords A B S T R A C T Retrofit Seismic Masonry URM Wall NSP FRP Shotcrete Ferro-cement Grouting The un-reinforced masonry (URM) buildings constitute a bulk of the building stock in the world and are prone to damage due to earthquakes which, of late, exhibit widespread occurrence. Hence, there is an imperative need for devising cost effective and efficient retrofitting measures for these vulnerable structures. Research in this area so for has resulted in the development of many procedure aimed at enhancement of the performance of URM structures. Traditional approaches include the use of shotcrete, external coatings such as with ferrocement, and strengthening with external steel bracing elements. These procedures though being effective are expensive, disruptive to building residents and render a negative impact on the aesthetic of the building which is an important aspect particularly for seismic buildings. To overcome these short comings, modern techniques such as the use of FRP overlays, use of near surface mounted (NSM) rods and vertical post tensioning have been adopted. In this paper a critical review is made of the various studies on masonry structures retrofitted for enhanced earthquake performance using FRP. 1 INTRODUCTION Masonry buildings are the most common type of construction used for housing purposes all around the world. In India masonry construction is employed in the rural, urban and hilly region up to its optimum, since it is flexible enough to accommodate itself according to the prevailing environmental conditions. That is why more than 90 per cent population of the country prefers to live in such houses. Although this type of construction is most often preferred and frequently employed, yet it is not completely perfect with regard to seismic efficiency. It has many flaws. The recent earthquakes in India revealed that its low seismic resistance had proved to be one of the principal causes of extensive damage, as compared to other modes. A collaborative project between the University of Missouri-Rolla and University of Pardue, investigated in- * Corresponding Author (E-mail: [email protected]) ISSN: 2345-3109
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