| Summary: | 碩士 === 國立臺灣大學 === 土木工程學研究所 === 107 === In recent years, in order to improve the ability of earthquake-resisting in reinforced concrete frame structure , steel brace is widely used in retrofit method.However, because of the concrete weak behavior under tension and high tension in steel brace , it casuses complex load and unfavorable condition between steel brace and reinforced concrete member.Also,the origin design performace will gradually reduced.In this study,we develop a new self-centering brace called compression only dual-core self-centering brace (C-SCB) , which only demonstrates compression mechanics behavior and preserve original self-centering ability through modifying conventional dual-core self-centering brace (SCB) proposed by chou and chung (2014).In this study, a proposed mechanics behavior formula of C-SCB has been verified by ABAQUS infinite element anlysis and test program.In order to understand the influence of different parameter such as pretension force 、rebar area and rebar length in C-SCB ,mechamics behavior formula has also been demonstrated in parameter study.The C-SCB(3.9meter) full scale test program was done in NCREE and successfully validate its kinematics and cyclic performance.
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