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프리스트레스트 콘크리트 Beam 교량의 콘크리트 강도 평가를 위한 비파괴 검사
한경봉 ( Han Kyoung-bong ),천영덕 ( Chun Young-duk ),박선규 ( Park Sun-kyu ),이성희 ( Lee Sung-heu ) 한국구조물진단유지관리공학회 1998 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.2 No.2
Due to the heterogeneous nature of a concrete, periodic inspections are compulsory to maintenance of quality of concrete structures. The major object of this study is to analyze and investigate experimentally the experimental equation for the estimate of compressive strength of prestressed concrete. In this study, surface hardness method, ultrasonic method are investigated to evaluate strength of concrete specimens. Specimens are cast in laboratory and cores are cut from specimens in order to estimate the accurate strength. These values are used to compare with calculated values from test data. The result shows that the proposed equation can reproduce the results at prestressed concrete beam girders more appropriately than previous equations.