Motion characteristics of compacted earth dams under small earthquake excitations in Taiwan

Jin Hung Hwang, Chia Pin Wu, Jui Te Chou

研究成果: 書貢獻/報告類型會議論文篇章同行評審

3 引文 斯高帕斯(Scopus)

摘要

This paper summarizes the characteristics of small seismic motions of four major compacted earth dams in Taiwan. Seismic data of four major dams recorded in the past thirty years were collected and analyzed. In general, ground motion characteristics can be expressed by peak ground acceleration (PGA), velocity (PGV), displacement (PGD) and predominant frequency of each motion history. The different statistical correlations between the PGA, PGV and PGD have been derived. The correlations are very consistent for different dams. The PGA amplifications from dam base to dam crest were also derived and show that the larger the base PGA, the smaller the amplification ratio, a phenomenon called non-linear effect of geo-material. The fundamental frequency of each earth dam was identified by the ratio of Fourier and response spectra of the seismic records at the dam crest and base. It was found that the larger the base PGA, the lower the fundamental frequency of the earth dam. The fundamental frequencies of the earth dams in direction transverse to the dam axis range from 1.5Hz to 2.0 Hz. It is interesting to observe that the fundamental frequency does not correlate well with the dam height as expected in the 2D dynamic analysis of the earth dam. This may suggest a possibility that a 3D dynamic analysis is required to more reasonably capture the real seismic response of earth dam.

原文???core.languages.en_GB???
主出版物標題Proceedings of the Geotechnical Earthquake Engineering and Soil Dynamics IV Congress 2008 - Geotechnical Earthquake Engineering and Soil Dynamics, GSP 181
版本181
DOIs
出版狀態已出版 - 2008
事件Geotechnical Earthquake Engineering and Soil Dynamics IV Congress 2008 - Geotechnical Earthquake Engineering and Soil Dynamics - Sacramento, CA, United States
持續時間: 18 5月 200822 5月 2008

出版系列

名字Geotechnical Special Publication
號碼181
ISSN(列印)0895-0563

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???event.eventtypes.event.conference???Geotechnical Earthquake Engineering and Soil Dynamics IV Congress 2008 - Geotechnical Earthquake Engineering and Soil Dynamics
國家/地區United States
城市Sacramento, CA
期間18/05/0822/05/08

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