摘要(英) |
Seismic microzonation for Taipei Basin has been included in the latest version of Seismic Design Code for Buildings, Taiwan. It is divided into four zones according to a corner period, and zone 1 has the longest corner period of 1.60 seconds. However, the deepest soil in Taipei Basin is as deep as 700 meters, the natural period may be more than 3 seconds. This study attempts to analyze the strong-motion records in Taipei Basin from major earthquakes which impact Taipei in the past twenty years. I found that at least for an earthquake which was occurred offshore Hualien on March 31, 2002, and at Luzhou and Wugu area, the corner period is more than 3 seconds.
This study classified the selected earthquakes into three types: subduction zone interface earthquake, subduction zone intraslab earthquake, and crustal earthquake. I calculate an average normalized response spectrum for each strong-motion station, then estimate the corner period and amplification factor from the average normalized response spectrum. Microzonation map for Taipei Basin is drawn based on the distribution of corner periods.
The result shows that the corner period for subduction zone interface earthquake is longer than that of the other two types, and there is positive correlation between corner periods and the natural period of a site. The 331 Hualien earthquake, which has caused hazard in Taipei Basin, has corner period longer than 3 seconds, but not all the subduction zone interface earthquake has a corner period as long as 331 Hualien earthquake. If we use the average normalized response spectrum to estimate a corner period, the longest corner period is only about 2.2 seconds. In this study, the corner periods from the average normalized response spectrum was used to construct a microzonation map for Taipei Basin. The result indicates that microzonation map from subduction zone interface earthquake is similar in pattern with that in the Seismic Design Code for Buildings. It can be seen that the microzonation is mainly controlled by subduction zone interface earthquakes. It can re-analyzed in the future with more earthquake data to obtain more reliable results and to update the Seismic Design Code for Buildings so that hazard may be mitigated.
|
參考文獻 |
ATC, ATC-32(1996) Improved Seismic Design Criteria for California Bridges: Provisional Recommendations, Applied Technology Council, Redwood City, California, 215p.
Boore, D. M., W. B. Joyner, T. E. Fumal(1993) Estimation of response spectra and peak accelerations from Western North American earthquakes: an interim report, U.S. Geol. Surv. Open-File Rept. pp.93-509.
Chen, C. H., C. C. Tsai, J. S. Chiou(2006) Discussions on Microzonation of Taipei Basin, 4th International Conference on Earthquake Engineering, Taipei, Taiwan, October 12-13, 2006, Paper No. 022., 10p.
EERI Committee on Seismic Risk(1989) The basics of seismic risk analysis, Earthquake Spectra, 5, pp.675-702.
Evernden, J., R. Hibbard and J. Schneider(1973) Interpretation of Seismic Intensity Data, Bull. Seism. Soc. Am., Vol.63, pp.399-422.
Finn, L W. D., T. Onur and C. E. Ventura(2004) Microzonation: Developments and applications, in Recent Advances in Earthquake Geotechnical Engineering and Microzonation, edited by Ansal, A., Kluwer Academic Publishers, pp.3-26.
Haskell, N. A.(1953) The Dispersion of Surface Waves on Multi-layered Media, Bull. Seism. Soc. Am., Vol.43, pp.17-34.
Imamura, A.(1913) Seismic Intensity Distribution in Tokyo and Osaka, Report of the Imperial Earthquake Investigation Committee, No.77, pp.17-42.
Midorikawa, S. (1987) Prediction of Isoseismal Map in the Kanto Plain due to Hypothetical Earthquake, Journal of Structural Engineering, Vol.33B, pp.43-48.
National Research Council(1988) Probabilistic Seismic Hazard Analysis, National Academic Press, Washington, D.C., 97p.
Newmark, N. M., W. J. Hall(1982) Earthquake spectra and design, Earthquake Engineering Research Institute, Berkeley, California, 103p.
Seed, H. B., C. Ugas, and J. Lysmer(1976) Site-dependent spectra for earthquake-resistant design, Bull. Seism. Soc. Am, 66, pp.221–243.
Schnabell, P.B., Lysmer, J. and Seed, H.B.(1972) SHAKE - A Computer Program for Earthquake Response Analysis of Horizontal Layered Sites, Report No. EERC 72-12, University of California, Berkeley, 88pp.
Technical Committee for Earthquake Geotechnical Engineering, TC4, ISSMGE(1999) Manual for Zonation on Seismic Geotechnical Hazards (Revised Version), published by the Japanese Geotechnical Society, 209p.
Tichelaar, B. W. and L. J. Ruff(1993) Depth of seismic coupling along subduction zones, J. Geophys. Res., 98, pp.2017-2037.
施陽東(1991) 臺北盆地內以地表反應為主之震度微分區。國立中央大學土木工程研究所碩士論文,共209頁。
劉震隆(1993) 臺北盆地之震度微分區。國立中央大學土木工程研究所碩士論文,共138頁。
陳志浩(1996) 台北盆地地盤強弱之微分區研究。國立台灣大學土木工程學系碩士論文,共111頁。
劉東京、林美聆(2001) 台北盆地震度微分區研究及其地理資訊系統之建立。第九屆大地工程學術研討會論文集(論文編號:C034),共8頁。
內政部營建署(2005) 建築物耐震設計規範及解說。共164頁。
葉超雄,鄧崇任,柴駿甫,廖文義(2001) 臺北盆地微分區及其相對應之微分區設計反應譜。內政部建築研究所研究計畫成果報告,共104頁。
羅俊雄,溫國樑,簡文郁,柴駿甫,鄧崇任,饒瑞鈞(2000) 考慮區域近斷層效應及均佈危害度之設計地震力需求。內政部建築研究所研究計畫成果報告,共61頁。
柴駿甫,鄧崇任(2005) 台北盆地微分區與結構耐震設計反應譜。國研科技第五期,50~53頁。
邱世彬,張毓文,簡文郁,柴駿甫(2008) 台北盆地設計地震微分區研究。國家地震研究中心,報告編號NCREE-08-043,共176頁。
李錫堤,黃慈銘,廖啟雯,陳宏仁(2002) 地下地質資料庫系統的建置與應用-以台北盆地為例。地工技術,第89期,第13-26頁。
溫國樑,葉永田(1998) 盆地對地震波效應之研究(Ⅰ)。中央地質調查所報告,第87-004 號,台北,共58頁。
鄧屬予(2006) 台北盆地之地質研究。西太平洋地質科學,第6 卷,第1-28 頁。
李錫堤,邱宏智,林柏伸,鄭錦桐(2006) 強震資料庫建置與維護及使用者平台開發(一)。財團法人中興工程顧問社研發叢書編號R-GT-06-02,共83頁。
林柏伸(2002) 台灣東北部地區隱沒帶地震強地動衰減式之研究。國立中央大學應用地質研究所碩士論文,共135頁。
謝寶珊(2008) 台灣地區愛氏震度衰減式之研究。國立中央大學應用地質研究所碩士論文,共94頁。
鄭錦桐(2002) 台灣地區地震危害度的不確定性分析與參數拆解。國立中央大學地球物理研究所博士論文,共227頁。
|