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S10 Long-period ground motions and their impacts on large-scale structures
Description:
Long-period ground motion becomes an important issue because of recent rapid increase of large-scale structures such as high-rise buildings, oil storage tanks, and long-span bridges. They can also affect long-period structures such as base-isolated buildings. Large subduction-zone earthquakes and moderate to large crustal earthquakes can generate far-source long-period ground motions in distant sedimentary basins with the help of path effects. Near-fault long-period ground motions are generated, for the most part, due to the source effects of rupture directivity. Far-source ones mostly consist of surface waves with longer duration than that of near-fault ones. They can even be damaging in some circumstances; the worst example occurred in Mexico City due to the 1985 Michoacan earthquake. Further examples were provided by recent large events such as the 2003 Tokachi-oki, Japan, earthquake. This session aims to discuss the characteristics of these kinds of long-period ground motions, their impacts on large-scale structures, and other issues related to them.
Conveners:
Kazuki Koketsu
Professor,
University of Tokyo, Japan.
Earthquake Research Institute, University of Tokyo
1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
Tel: +81-3-5841-5782
Fax: +81-3-5841-8278
E-mail: koketsu@eri.u-tokyo.ac.jp
Robert W. Graves
Principal Seismologist,
URS Corporation, Pasadena, USA.
Kusnowidjaja Megawati
Assistant Professor,
Nanyang Technological University, Singapore.
Thomas H. Heaton
Professor,
California Institute of Technology, USA.
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Exhibitors List
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