Abstract
Abstract In this study, It is developed a retrofitting procedure of RC column with rectangular section to archive the target displacement at failure. Nonlinear behavior of the column is considered as the equivalent linear system. First, target displacement is determined, and then elastic displacement spectrum is constructed to estimate the equivalent natural vibration period of the SDOF system. After natural vibration period is determined, required strength is calculated using secant stiffness based on the mass of system. In accordance with, obtained force-displacement relationship through non-linear fiber based section analysis, retrofit design was carried out to meet required strength. As a result, retrofitted RC column can confirm that the improved seismic performance. It is observed that the proposed design procedure can be applicable to seismic retrofitting design of columns. Key Words : Retrofit design, Equivalent linear system, Elastic design spectrum, Target displacement 이 논문은 2011년도 정부(교육과학기술부)의 제원으로 한국연구재단의 중견연구자 지원사업(2011-0028531)의 지원을 받아 수행된 것임.
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