Title Acceptable seismic performances of civil infrastructures
Author Iemura, Hirokazu
Publisher Institute of Social Science Safety (1999)
Abstract The Hyogo-ken Nanbu Earthquake (Kobe) of January 17, 1995 caused severe damage to buildings, highway bridges, railways, lifeline systems, port facilities, and so on. This event is the first instance in which engineering structures which were designed for the highest seismic forces in the world have been subjected to such destructive ground motions. Comparison of the response spectra between the Kobe records with those previously obtained from historical earthquake records reveals an extremely high damage potential for the near field earthquake ground motion. From the serious lessons provided by the severe damage of civil infrastructures in the Kobe area, public opinion demands the higher performance of the infra-systems. Quick retrofitting of old structures and re-examination of present seismic design codes are essential. With conventional ductility demand design methods, the structural response due to an extreme earthquake ground motion will develop into the plastic range, which often makes structures inoperative and un-repairable. The importance of the research and development of structural control technology for restoration, retrofit, and construction of new structures, not only to reduce structural damages, but also to assure function of structures, is emphasized in the framework of the performance based design method.
Description: In 'Proceedings of the 6th Japan/US Workshop on Urban Earthquake Hazard Reduction.' edited by Kazuyoshi Ohnishi, and Norio Maki. January 12-14 1999. pp. 564-571.
Subject: Structural Engineering
Structural Failure
URI http://hdl.handle.net/10590/5215
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