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    초록·키워드

    The main concept of base isolation system is to reduce the member forces by decreasing the earthquake forces transmitted to supersturcture instead of the conventional techniques of strengthening the structural members. This paper is to analyze dynamic behavior of buildings with LRB(Laminated Rubber Bearing) type base isolator which is the most common base isolation system. The quation of motion of the base isolated structure is derived from coupling the two equation for superstructure and isolator. In this paper, onlu the first mode pf supersuructure is considered, because the first mode contributes in excess of 80% of the total motion.

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      UCI(KEPA) : I410-ECN-0101-2009-540-012930450