NUMERICAL ANALYSES AND EXPERIMENTS OF DEFORMABLE RUBBER MEMBRANE PARAPETS

Insik Chun, Sunsin Kim, Janghee Ko, Woosun Park

Abstract


It has been reported that global warming has invoked an ever increasing typhoon intensity as well as a long-term rise in sea levels which jointly cause severe coastal wave overtopping. A simple measure to cope with this undesirable change is to simply increase the crest height of coastal structures. This measure is certainly effective in the prevention of wave overtopping, but it can also reduce coastal visibility and lead to the degradation of waterfront seascapes. In this paper, Deformable Rubber Membrane Parapets (DRMP), which not only suppress the wave overtopping in storm periods, but also can retain coastal seascapes in milder conditions, are presented. With numerical analyses using a nonlinear finite element program and hydraulic experiments, the air controlled expansion and contraction of the parapets are investigated, together with their structural behaviors and stability against wave overtopping.

Keywords


rubber membrane parapet; LS-DYNA; deformable structure; wave overtopping

References


Goda, Y. 1985. Random seas and design of maritime structures, University of Tokyo Press.

Korea Hydrographic and Oceanographic Administration. 2008. Annual sea level rise around korea (News release), http://www.khoa.go.kr/news/press_view.asp?borad_no=1154.

LS-DYNA. 2006. Theory Manual, LIVERMORE SOFTWARE TECHNOLOGY CORPORATION.

National Emergency Management Agency, 2005. Historic rank of damages due to heavy rain falls and typhoons, http://www.nama.go.kr/nema_cms_iba/show_nema/board/board9s/view.jsp.


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