WAVE REDUCING COUNTERMEASURE IN THE MARINA, AND RESEARCH ON SERVICE LIMIT BY THE ROLLING AND PITCHING OF FLOATING PIER

Abstract

 The performance requirement for marina varies depending on the quality of the service. In previous approaches, a limit wave height 0.3m or less is usually applied as service limit in the existing marina. On the other hand, when wave height is less than 0.3m, the rolling and pitching of floating pier may give uneasiness to users depending on the natural period of the floating pier and harbor.
 In this study, I examined application of restrictions of marina by the rolling and pitching of the floating pier. First, I suggested that even if it was less than wave height 0.3m we feel uneasiness when ascending and descending the stairs. Second, the field observation on the marina clarified properties of the floating pier and wave. Survey on the use of marina confirmed the service limit of the floating pier. Finally, the improvement of calmness that adapted to the properties showed an effect.