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심성택 ( Shim S. T ),송민성 ( Song M. S ),이광수 ( Lee K. S ),신성우 ( Shin S. W ) 한국구조물진단유지관리공학회 2001 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.5 No.2
External Confinement of concrete in CFS(Carbon Fiber sheets) enhances strength and ductility of concrete columns. This paper presents the test results on the study of reinforced concrete columns strengthened with carbon fiber sheets. The purpose of this research is to evaluate the CFS confinement characteristics of square reinforced concrete columns and the ductility behavior of R/C columns strengthened with CFS. The tests were performed with different lateral reinforcement ratios, CFS reinforcement ratios and concrete strength. Test results were characterized according to maximum loads and lateral strain of CFS and Lateral reinforcement.
송민성 ( Song¸ M. S ),심성택 ( Shim¸ S. T ),이광수 ( Lee¸ K. S ),신성우 ( Shin¸ S. W ) 한국구조물진단유지관리공학회 2001 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.5 No.2
Most period code formulas for the RC moment resisting frame building are empirical formulas. Code formula is developed by the measured period of the low-medium buildings during the 1971 San Fernando Earthquake. But measured periods are insufficient to assure the reliability of its accuracy and safety. This paper improves the code formula by regression analysis of the measured period data. Seismic coefficient using the improved formula is evaluated and also compared with those of being based on the current code formula.