When – Wednesday 13th May 2026
Where – Room 423-348, University of Auckland - 22 Symonds Street, Auckland Central, Auckland.
Agenda –
17:30 pre-presentation refreshments
18:00 presentation
Please register for this presentation below:
Various building responses recorded during the 2011 Tohoku Earthquake
Description:
Registration opens at 04-05-2026 19:19
Registration closes at 13-05-2026 17:30
Max Participants: 100
Registered Users:
- Henry Rowden
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Abstract:
This presentation discusses recorded responses of the conventional seismically-resistant buildings, vibration-controlled buildings, and base-isolated buildings shaken during the Tohoku Earthquake, March 11, 2011. The building heights vary from 8 to 54-storeys. The buildings are in either the Tohoku area (strong shaking) or Tokyo metropolitan area (moderate shaking). Many response records obtained from the latter are analyzed to find the modal periods, damping ratios, and participation vectors. They are then used to express the recorded responses mode-by-mode. By this approach, (1) various shaking phenomena observed in the tall buildings will be clarified, (2) characteristics of the above-mentioned three building systems and their effects on building contents will be explained, and (3) effectiveness of vibration control and base isolation will be discussed.
Presenter Biography:
Dr Kazuhiko Kasai
Dr Kazuhiko Kasai, Professor Emeritus, Institute of Science Tokyo (formerly Tokyo Institute of Technology) is an internationally recognized researcher and educator in the areas of steel structures, response control, and earthquake engineering. He obtained a PhD degree in 1985 from the Structural Engineering and Structural Mechanics Division, Univ. of California, Berkeley. He conducted many research projects in the US and later in Japan, with the total budget of the research exceeding 20 million dollars. For more than 20 years, Prof. Kasai served as the chairman of various committees on passive control and steel structures for Japan Society of Seismic Isolation (JSSI), Architectural Institute of Japan (AIJ), and others.
Prof. Kasai was the Japan-side leader of the US-Japan (NEES and E-Defense) steel building research projects including E-Defense full-scale tests of conventional structure and value-added or response-controlled structures, as well as the Strategic China-Japan Cooperative Program on tall buildings. Prof. Kasai was the chief editor for “JSSI Manual for Design and Construction of Passively Controlled Building”,1st to 3rd editions. He is currently the president of the House Seismic Vibration Control Consortium addressing seismic protection of houses in Japan, and has published the “Vibration Control Manual for Residential Buildings”, 1st edition.