Damage Development on Stone-Armored Breakwaters and Revetments

摘要

This Coastal and Hydraulics Engineering Technical Note (CHETN) provides a method to calculate damage progression on a rubble-mound breakwater, revetment, or jetty trunk armor layer. The methods apply to uniform-sized armor stone (0.75W(exp 50) less than or equal to W(exp 50) less than or equal to 1.25W(exp 50), W(exp 50)) = median weight of armor stone) as well as riprap (0.125W(exp 50) less than or equal to W(exp 50) less than or equal to 4W(exp 50)) exposed to depthlimited wave conditions. The equations discussed herein are primarily intended to be used as part of a life-cycle analysis, to predict the damage for a series of storms throughout the lifetime of the structure. This lifecycle analysis including damage prediction allows engineers to balance initial cost with expected maintenance costs in order to reduce the overall cost of the structure. The equations are intended to provide a tool for accurate damage estimates in order to reduce the possibility of unexpected maintenance costs.