%0 Journal Article
%A Ramírez, J. L.
%A Bárcena, J. M.
%A Urreta, J. I.
%A Sánchez, J. A.
%T Efficiency of short steel jackets for strengthening square section concrete columns
%D 1997
%@ 0950-0618
%U https://hdl.handle.net/11556/3870
%X Following other short length square concrete column strengthening methods which have been studied and published before by the authors (polymeric concrete, steel angles and prestressed bolts jackets), two different additional methods will be presented in this paper. In one of this methods the steel jacket is formed by two bent plates L shaped welded longitudinally in the two common corners, leaving a small clearance with respect to the original column surface that is injected with a polymeric grout afterwards. In the other, the jacket is made by adhesion of steel plates to the complete four faces of the column, closing the jacket by narrow bent plates L shaped joined also by adhesion to the steel plates at the column corners. Complete loss of strength of the original concrete column has been assumed, in centered compression, and a method of calculation for load transfer between column and jacket in the smallest length possible will be presented. A good experimental behaviour and correspondence between calculation and results has been obtained for the welded and injected jacket but these results have been poor for the jacket built up by adhesion. Problems caused by the quality of adhesive and mastics have also been detected, and finally some observations concerning the price and conditions of execution have been made.
%~