AN EXPERIMENTAL STUDY TO TAKE A PROTECTIVE MEASURE FOR LOCAL DAMAGE IN RC CAISSON BREAKWATER CAUSED BY COLLISION OF A PRECAST CONCRETE ARMOR UNIT

Abstract

Of RC caisson breakwaters located in the sea area of severe wave conditions, the local damage with holes has been occasionally caused by the repetitive collision of precast concrete armor units. To take an effective measure of protecting local damage in the RC wall of breakwater, the colliding behaviors should be investigated. Thus the static and horizontal impact tests for RC plates, scaled by 1/6.4 of caisson breakwater, were executed. Based on test results, the damage mechanism was examined by the relation between colliding velocity and number of repetition of impactor. And, it can be found that attaching the rubber pad to impact face is of effective to protect RC plate from local damage.