Abstract
Damage to various harbour structures caused by the 1968 Tokachioki earthquake and subsequent tsunami is described. Stability analysis was made for these structures by the current design method, and the result was compared with the actual condition of damage.According to the result of damage survey and quantitative analysis, the following conclusions were derived.(1) The feature of earthquake damage to harbour structures was, in general, not different from those observed in past earthquakes.(2) The current procedures for earthquake resistant design of harbour structures as a whole are on the fairly safe side.
