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†Department of Architecture and Building Engineering, Kunsan National University, Gunsan 573-701, Korea  :           1.5m, 2.0m, 2.5m   3 15            . , RAO-            .    ,                 ,      .  :  ,  ,  , , Abstract : To examine the interaction of the floating pontoon with a steel moment resisting frame, the static structural analysis is carried out, in which the pressure load are calculated from the forgoing fluid dynamic analysis ,varying the period of wave from 3 to 15 second and for 3 cases of depth of pontoon, 1.5, 2.0, 2.5m. As results, it has shown that RAO-pitch has the linear relationship with the increase of moment of the frame and the curvature of pontoon is reversely proportional to the stiffness of pontoon. By synthesizing these results, an estimation method is proposed, which predicts the moment of frame of the different depth of pontoon based on the analysis result of an arbitrary depth of a floating pontoon. The estimation result shows considerably good agreement, compared with the analysis result.Key words :floating pontoon, superstructure, stiffness variation, curvature, steel moment resisting frame †, leeyu@kunsan.ac.kr 063)469-4784 * , stpja@kunsan.ac.kr 063)469-1956 , luckyc007@hanmail.net 063)469-1956 ** , pig_jj@naver.com 063)469-1956

Response Characteristics of the Steel Moment Resisting Frame According to the Stiffness Variation of Pontoo