ESTIMATION OF PEAK WAVE STRESSES IN SLENDER COMPLEX CONCRETE ARMOR UNITS

Gary L. Howell, Hans F. Burcharth, Joon P. Rhee

Abstract


Recent methods for the structural design of concrete armor units divide the forces into static loads, impact loads, and wave or pulsating loads. Physical model technology is being developed at several laboratories to measure wave loads on model armor units. While this technology represents significant progress, structural designers require a maximum stress value to design armor units. Rubble mound breakwaters are structures with both random loading and random boundary conditions, such that a single set of stress measurements cannot characterize the loading. This paper presents a method to determine a design stress for wave induced loads based on the design wave height, a designer specified exceedance probability, and a site specific parameter, ks, which can be empirically determined from physical model measurements. The methodology was developed from analysis of many field measurements of wave loads on 38-tonne dolosse armor units at Crescent City, California.

Keywords


wave stress; concrete armor; armor unit

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