Acceleration-amplified responses of geosynthetic-reinforced soil structures with a wide range of input ground accelerations

Kuo Hsin Yang, Wen Yi Hung, Erick Yusuf Kencana

研究成果: 書貢獻/報告類型會議論文篇章同行評審

8 引文 斯高帕斯(Scopus)

摘要

A series of dynamic centrifuge tests is performed to investigate the accelerationamplified and de-amplified responses within geosynthetic-reinforced soil (GRS) structures. Further, a database from various dynamic centrifuge and shaking-table tests is compiled from literature to cover a wide range of input ground accelerations in the range of 0.01.1.0g. This study demonstrates that among all factors in GRS structures (i.e., structural configuration, backfill and reinforcement material, and seismic characteristics), input ground acceleration, ag, location, z, and input motion frequency, f, have the most significant effects on acceleration-amplified responses of GRS structures. The magnitude and variation of acceleration amplification factor, Am, which is the ratio of horizontal acceleration inside GRS structures, ah, to input ground acceleration, ag, decrease as ag increases. Am is larger than 1.0 and non-uniformly distributed with height at approximately ag<0.40g; while Am is less than 1.0 and generally uniformly distributed with height at ag≥0.40g. Experimental results show that acceleration-amplified responses are highly dependent on input frequency, f. Acceleration inside GRS structures increases markedly when the predominant and fundamental frequencies are close. Further, this study examines the Am and amax relationships (i.e., Am=1.45-amax/g) adopted in current GRS structure design guidelines. Comparison results indicate that the Am and amax relationship adopted in current design guidelines follows well the trend line (Am=-0.69lnag+0.43) regressed from complied physical data at ag≥0.40g, but underestimates Am at ag<0.4g. The influence of location and frequency on Am, as observed from physical data, is not considered in the current design guidelines.

原文???core.languages.en_GB???
主出版物標題GeoCongress 2013
主出版物子標題Stability and Performance of Slopes and Embankments III - Proceedings of the 2013 Congress
發行者American Society of Civil Engineers (ASCE)
頁面1178-1187
頁數10
版本231 GSP
ISBN(列印)9780784412787
DOIs
出版狀態已出版 - 2013
事件2013 Congress on Stability and Performance of Slopes and Embankments III, Geo-Congress 2013 - San Diego, CA, United States
持續時間: 3 3月 20137 3月 2013

出版系列

名字Geotechnical Special Publication
號碼231 GSP
ISSN(列印)0895-0563

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???event.eventtypes.event.conference???2013 Congress on Stability and Performance of Slopes and Embankments III, Geo-Congress 2013
國家/地區United States
城市San Diego, CA
期間3/03/137/03/13

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