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1. Uncertainties in long-period ground motion and its impact on building structural design: Case study of the 2011 Tohoku (Japan) earthquake

Author

Takewaki, Izuru, Fujita, Kohei, and Yoshitomi, Shinta

Subjects
*CONSTRUCTION, *SENDAI Earthquake, Japan, 2011, *CASE studies, *UNCERTAINTY (Information theory), *COMPUTER simulation
Abstract

Abstract: On March 11, 2011, Japan was shaken by the 2011 off the Pacific coast of Tohoku earthquake (the Great East Japan Earthquake). This paper reports some aspects of this earthquake related to long-period ground motions and its impact on building structural design. It was reported that long-period ground motions were induced extensively in Tokyo, Nagoya and Osaka. The response of high-rise buildings to the recorded ground motions during this earthquake and the simulated ground motions provided by the Japanese Government is discussed from the viewpoint of resonance and critical excitation. The main topics of this paper are (i) the investigations on uncertainties in long-period ground motions (uncertainty in predominant frequency, duration and amplitude) and (ii) its impact on structural design of super high-rise buildings. It is shown finally that the earthquake input energy and its bound analysis lead to clearer understanding of the effect of long-period ground motion on building structural design. [Copyright &y& Elsevier]

Published
2013
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2. Uncertainties in long-period ground motion and its impact on building structural design: Case study of the 2011 Tohoku (Japan) earthquake

Author

Shinta Yoshitomi, Kohei Fujita, and Izuru Takewaki

Subjects
Ground motion, Critical excitation, Peak ground acceleration, Seismic microzonation, Earthquake input energy, Mitigation of seismic motion, Great East Japan Earthquake, Resonance, Passively controlled structure, Physics::Geophysics, Earthquake simulation, Long period ground motion, Earthquake shaking table, Geotechnical engineering, Long-period ground motion, Geology, Seismology, Civil and Structural Engineering
Abstract

On March 11, 2011, Japan was shaken by the 2011 off the Pacific coast of Tohoku earthquake (the Great East Japan Earthquake). This paper reports some aspects of this earthquake related to long-period ground motions and its impact on building structural design. It was reported that long-period ground motions were induced extensively in Tokyo, Nagoya and Osaka. The response of high-rise buildings to the recorded ground motions during this earthquake and the simulated ground motions provided by the Japanese Government is discussed from the viewpoint of resonance and critical excitation. The main topics of this paper are (i) the investigations on uncertainties in long-period ground motions (uncertainty in predominant frequency, duration and amplitude) and (ii) its impact on structural design of super high-rise buildings. It is shown finally that the earthquake input energy and its bound analysis lead to clearer understanding of the effect of long-period ground motion on building structural design.

Published
2013