| Summary: | 碩士 === 國立臺灣海洋大學 === 河海工程學系 === 102 === This study used the multi-domain boundary element method (MBEM) to investigate oblique incident wave composite curtainwall pile supported breakwaters and the hydrodynamic characteristics of curtainwall pile supported breakwaters. This study suggested that each row of curtain wall should use the submerged water depth of the upper impermeable structure as an incremental. Accordingly, wave energy can permeate the front curtain wall and the rear curtain can dissipate the wave energy. However, when the distance between a wave and the front-face curtain wall (B1/L) was approximately 0.5, a resonance problem occurred in the surface water between curtain walls. Therefore, the curtainwall pile supported breakwaters were ameliorated by adding a horizontal permeable plate to the front-face side of curtainwall pile supported breakwaters. The results showed that the resonance problem ceased and the double-row composite curtainwall pile supported breakwaters presented optimal performance (the relative submerged water depth of the curtainwall pile supported breakwater: d1/h = 0.1 and d2/h=0.5; B/h (relative distance) = 0.5; f (friction coefficient) = 2.0, S (inertial coefficient) = 1.0; b/h (relative thickness) = 0.06; εv (porosity) = εh=0.6). Furthermore, the results showed that the ameliorated breakwaters rendered water surface steadier, reduced the amount of wave run-up caused by resonance in the internal structure, and lowered the possibility of breakwater damage. The curtain wall structure also enabled breakwaters to resist wave force.
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