Sharif University of Technology Scientia Iranica 1026-3098 17 5 2010 10 01 Numerical Study on Reinforcing of Thin Walled Cracked Metal Cylindrical Columns Using FRP Patch 3160 EN M.Z. Kabir Department of Civil Engineering,Amirkabir University of Technology A. R. Nazari Department of Civil Engineering,Amirkabir University of Technology Journal Article 2010 11 03 In this paper a new technique was proposed for the repair of defected metal columns. The finite element method was chosen to find out the adequacy of the proposed method, regarding, the load carrying capacity of two types of thin walled cylindrical columns with L=D = 10 and 20 along with circumferential and longitudinal cracks. The study considers the non linearity behavior in both material as well as geometrical characteristics. Various configurations of the composite patches made from carbonepoxy were assumed on the cracked region and the in uence of a patch on the load carrying capacity of the columns was examined. The obtained results indicate that composite material can not only compensate the effect of damage on column buckling load, but also increase buckling strength to a level even greater than in an intact one. https://scientiairanica.sharif.edu/article_3160_9808ae38758804501ca3fc0697050e03.pdf