Please use this identifier to cite or link to this item:
標題: Effect of wave non-linearity on the standing-wave-induced seabed response
作者: Tsai, C.P.
Lee, T.L.
Hsu, J.R.C.
關鍵字: standing waves;wave nonlinearity;pore pressure;seabed response;liquefaction potential;induced pore pressures;effective stresses;soil response;water-waves;bed;breakwater
Project: International Journal for Numerical and Analytical Methods in Geomechanics
期刊/報告no:: International Journal for Numerical and Analytical Methods in Geomechanics, Volume 24, Issue 11, Page(s) 869-892.
A standing wave in front of a seawall may reach a height more than twice of its incident component. When excess pore pressure occurs, it may even induce seabed instability, hence endangering the structure. This issue was studied previously using only linear wave theory. In this paper, standing-wave theory to a second-order approximation is applied, in order to demonstrate the differences between these two solutions. The spatial and temporal variations in the instantaneous pore pressure are first calculated, in addition to their vertical distributions. The effects of wave height, water depth and the degree of soil saturation on pore pressure distributions are then discussed, followed by the net pore pressure averaged over one wave cycle. The results suggest the existence of a residual pore pressure in the seabed and its net pore pressure can be used to estimate the wave-induced liquefaction potential in a soil column. It also indicates that, in deep water, the second-order solution predicts that a negative pore pressure at an antinode which may be greater than a positive pressure. Overall, the second-order solution is found to agree better with the experimental results of the pore pressures available, compared to the linear solution. Copyright (C) 2000 John Wiley & Sons, Ltd.
ISSN: 0363-9061
Appears in Collections:土木工程學系所

Show full item record

Google ScholarTM




Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.