An empirical equation of effective shaking duration for moderate to large earthquakes

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題名:	An empirical equation of effective shaking duration for moderate to large earthquakes
作者:	馬國鳳;Lee, Ya-Ting;Ma, Kuo-Fong;Wang, Yu-Ju;Wen, Kuo-Liang
貢獻者:	地球科學學院地球科學學系
關鍵詞:	Amplitudes;Building construction;Civil Engineering;Construction;Earth and Environmental Science;Earth Sciences;Earthquakes;Empirical equations;Environmental Management;Geophysics/Geodesy;Geotechnical Engineering & Applied Earth Sciences;Ground motion;Hazards;Hydrogeology;Landslides;Landslides & mudslides;Liquefaction;Mathematical analysis;Natural Hazards;Original Paper;Seismic activity;Seismic phenomena;Shaking;Wave velocity
日期:	2015-12-16
上傳時間:	2026-04-23 11:28:27 (UTC+8)
出版者:	Springer Netherlands;Dordrecht: Springer Netherlands
摘要:	摘要： The duration of strong shaking is particularly important for assessing building performance, potential landslides and liquefaction hazards. The results of this investigation can potentially help reduce related fatalities and economic losses. In this study, we analyzed the acceleration seismograms of the Taiwan strong motion network to characterize the strong shaking duration associated with earthquake sources, propagation paths and site effects. This study proposes a new definition for the strong shaking duration called “effective shaking duration” (ESD), which considers the amplitude and radiation energy decays. We first consider the window of a time series during which the amplitude is ≥0.01 g, and we then defined the ESD as the length of the interval of the dissipated energy within 5–95 % of the total energy during this time frame. We calculated the strong shaking duration for 495 inter-plate events with magnitudes of M L > 5.0 and focal depths <50 km in the Taiwan region from 1994 to 2012. Using a nonlinear regression procedure, we thus obtained an empirical equation for strong shaking durations. The equation is a function of earthquake magnitude, distance and site conditions, which are defined by the V s 30 value (the S-wave velocity structure of the top 30 m of the site). The results indicate that the shaking durations significantly increase with magnitude and also decrease with distance and V s 30. Compared with empirical equations from global datasets, our empirical equation is applicable to earthquakes in other regions and will produce smaller but more applicable duration values for smaller earthquakes. However, for larger events, our ESD values are comparable with those derived from other definitions (e.g., significant duration). Although the empirical relationship is mainly based on Taiwanese events, in view of the massive dataset, this empirical equation could provide important information to the global community regarding the ground shaking duration estimation in the ground motion prediction of future earthquakes. 其他題名： Nat Hazards 出版者： Dordrecht: Springer Netherlands 出版日期： 2015-01-01 出處： Natural hazards (Dordrecht), 2015-01, Vol.75 (2), p.1779-1793 資源來源： Agricultural & Environmental Science Collection 版權： Springer Science+Business Media Dordrecht 2014 版權： Springer Science+Business Media Dordrecht 2015 識別號： ISSN: 0921-030X 識別號： EISSN: 1573-0840 識別號： DOI: 10.1007/s11069-014-1398-7
顯示於類別:	[地球科學學系] 期刊論文

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