Affiliation:
1. Port and Airport Research Institute, Nagase 3-1-1, Yokosuka, Kanagawa, 239-0826, Japan
Abstract
In the Indian Ocean Tsunami, numerous drifting bodies like timbers induced by the strong tsunami flow caused the damage of houses. Such influences by the drifting body due to tsunami are worried especially in the Japanese harbor area where a new offshore runway is under construction using the jacket-type structure. The jacket is composed of vertical piers and oblique supporters with about 1 m diameter and is placed in the sea 20 m deep. In the paper, the impulsive wave force by a drifting timber due to tsunami flows is experimentally studied using a wave basin with a current generator. The target tsunami flow velocity calculated for the design earthquake is 0.9 m/s at the jacket location and the scale in the experiment is 1/10. In the experiments, the maximum total horizontal force acting on a vertical column fixed in a channel was measured and its characteristic was investigated. The collision force was mainly determined in the drifting velocity and timber mass. An experimental equation to evaluate the maximum force was derived and its accuracy was demonstrated.
Publisher
World Scientific Pub Co Pte Lt
Subject
Geophysics,Geotechnical Engineering and Engineering Geology,Oceanography
Cited by
4 articles.
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