STATIC LOADING TESTS OF OF STEEL COLUMN WITH CORRODED PART STRENGTHENED BY THERMOSETTING PREPREG CF SHEETS

Abstract

 Decreasing of plate thickness due to corrosion at part near ground of steel columnar structures like lighting pole causes lack of their strength and/or fatigue resistance. To reduce risks of their breaking, a repair and strengthening technique operated and expected a reliable strengthening effects in a short period of time can be keys. Then the authors are newly developing thermosetting epoxy resin prepreg sheet of carbon fiber for the repair and strengthening of steel structures. The thermosetting epoxy resin prepreg CF sheet will provide a shorter period to obtain an expected strengthening effect, different from ultravioletcuring type adhesive conventionally used.
 This report presents concepts of the repair and strengthening technique using the newly developed thermosetting prepreg CF sheet, results of static loading test on strengthening effects and a field test of the technique to a real lighting pole at the site. And fundamental strengthening effects on the ultimate strength and rapid practice of the repair technique were confirmed.