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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Experimental Study on Seismic Performance of Reinforced Concrete Columns Retrofitted with Composite-Materials Jackets
Author(s): A. Zhang, T. Yamakawa, P. Zhong, and T. Oka
Publication: Special Publication
Appears on pages(s): 269-278
Keywords: columns; compressive failure; ductility; fiber sheets;
Abstract:In order to improve seismic performance of existing R/C buildings which were designed on the basis of the old seismic design code before 1981, the various retrofitting methods have been proposed, especially after the Hyogo-ken Nanbu earthquake happened in 1995 in Japan. In this study, an experimental study was conducted to examine the seismic performance of existing R/C columns retrofitted with composite-materials such as carbon fiber or aramid fiber sheets. Quantity, retrofitting types and kinds of continuous fiber sheets were adopted as the experimental variables. As a result, by retrofitting columns with continuous fiber sheets, the failure mode of the columns changed from shear failure to flexural one. However, if the ply of continuous fiber sheets is not enough, the columns collapse because of hinge region concrete crashing just after longitudinal rebar yielding and its ductility is poor. Therefore, to make R/C column retrofitted with fiber sheets have good ductility, the fiber sheets should have a certain of membrane stiffness.
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