Abstract
The 2004 December Sumatra earthquake generated tsunami waves caused enormous damage in Sri Lanka. In order to investigate damaged situation due to tsunami propagation in rivers, the committee on Hydroscience and Hydraulic Engineering, Japan Society of Civil Engineers (JSCE) delegated its members as a field investigation team of JSCE. As Sri Lanka is locatedvery far from a possible large earthquake epicenter, influence of shaking earth can be only transferred bytsunami waves. In this paper, damaged situation of 34 bridges alone the southwest coast of the country are discussed. Analyzing the causes for bridge damages, we show the advanced design subjects for river bridges to withstand future tsunami waves.
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