Evaluation of Tsunami Force Acting on Bridge Girders

Content Provider	Semantic Scholar
Author	Maruyama, Kyuichi Tanaka, Yasushi Kosa, Kenji Hosoda, Akira Arikawa, Taro Mizutani, Norimi Nakamura, Tomoaki
Copyright Year	2013
Abstract	This paper deals with what tsunami force acted on b ridge girders by Great East Japan Earthquake broken out in March 11, 2011. First of all, a lot o f efforts were conducted to collect almost all data of bridge girders in the inundation area. Satellite images in internet websites proved effective to make a quick survey of any bridge in the inundation area. For damage analysis the detailed data of bridges were collected through authorities. The me thod proposed by Prof. Kosa was introduced to see whether bridges were washed away or not by tsun ami. The resistance of bridge is expressed as a function of the self-weight of bridge girder, and t he force due to tsunami is defined by hydro-dynamic equation. More than two hundred brid ges, including both washed away bridges and survived ones, were analyzed by the method. Th e damage analysis showed the importance of characteristics of tsunami, such as velocity and he ight in the land. Then, motion pictures taken during attack of tsunami were examined to evaluate the velocity and height of tsunami in the land. When bridges in a limited area were taken into acco unt, the method was effective to see whether bridges were survived or not. Field survey showed that bridges washed away by tsunami should have had uplift force by tsunami. Experimental inv estigation was done using a water channel in different scales to examine what forces acted on br idge girders and to develop a proper simulation model.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/54508/1/KeynoteLecture_3.pdf
Alternate Webpage(s)	http://www.jci-net.or.jp/e/publish/others/ACI_JCI_Joint_Seminar/img/ACI-JCI_Joint_02.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article