콘크리트 피복재의 단면파괴에 대한 신뢰성 해석

초록

A fracture or breakage of the concrete armor units in the primary cover layer of breakwaters isstudied by using the reliability analysis which may be defined as the structural stability. The reliability functioncan be derived as a function of the angle of rotation that represents the rocking of armor units quantitatively. Therelative influences of al of random variables related to the material and geometric properties on the fracture ofarmor units is analyzed in detail. In addition, the probability of failure for the fracture of individual armor unitcan be evaluated as a function of the incident wave height. Finally, Bernoulli random process and the alowablefracture ratio may be introduced together in this paper, by which the probability of failure of a breakwater due tothe fracture of armor units can be obtained straightforwardly. It is found that the probability of failure of abreakwater due to the fracture of armor units may be varied with the several allowable fracture ratios. Therefore,it should be necessary to consider the structural stability as well as the hydraulic stability for the design ofbreakwaters with multi-leg slender concrete armor units of large size under wave action i28(n deep water.

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