Abstract
This paper is presented about seismic retrofit methods for existing concrete columns with steel plate combined with aramid fiber sheets subjected to axial load. The component of steel plate does not require any welding on site. In place of welding, aramid fiber sheets applied over the entire exterior surface of the steel plates by continuous rolls, provide the necessary binding of the steel plate components in addition to providing its own structural contribution. The purpose of this study is to examine the lateral confinement effect. Also theoretical formulas, derived from the model of compressive strut, were proposed to evaluate the compressive behavior.
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