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http://dx.doi.org/10.11112/jksmi.2010.14.3.091

Behavior of RC Beam Strengthened with Advanced Lifting Hole Anchorage System  

Oh, Min-Ho (성균관대학교 건설환경시스템공학과)
Kim, Tae-Wan (성균관대학교 건설환경시스템공학과)
Park, Sun-Kyu (성균관대학교 건설환경시스템공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.14, no.3, 2010 , pp. 91-99 More about this Journal
Abstract
In order to strengthen RC structures, various strengthening methods have been used. Particularly, external tendon strengthening method is very popular method to strengthen damaged structures in terms of efficiency, ease, economics. In this study, improved anchorage elements using the lifting hole were proposed to strengthen PSC or RC girder without any damage. Two types of anchorage elements were proposed and these elements were applied on six RC beams. Also, three types of existing anchorage elements were applied on three RC beams. Otherwise, any anchorage element was not applied on one RC beam to used as a control beam. To analyse behavior of these elements, static load tests were carried out. Test variables were anchorage shapes, prestressing level on the steel bar and tendon profiles. Deflections, strains and modes of failure were recorded to examine the strengthening effects of the beams. Ductility index and tendon stress were analyzed by comparing cracking load, yielding load and ultimate load. As a result, proposed anchorage elements using lifting hole were superior to existing anchorage elements in terms of strengthening effect and furthermore, they showed ductile behavior based on energy method.
Keywords
External tendon; Anchorage element; Lifting hole;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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