Abstract
In recent years, it has been shown that the seismic performance of existing buildings can be enhanced considerably by bracing them with post-tensioned rods or cables. This upgrading technique has several advantages, which include architectural versatility, low cost and fast construction. Furthermore, it does not add a significant mass to the existing building. The objectives of the present paper are to: investigate the use of post-tensioned steel bracing for seismic retrofit of non-ductile reinforced concrete frames with unreinforced masonry infills, discuss some of the issues that need to be addressed in the design of the rehabilitated building, assess the advantages of this rehabilitation technique by studying the seismic performance of an infilled non-ductile frame building before and after it has been upgraded with post-tensioned braces, and propose research recommendations.
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