| 摘要(英) |
In recent years, a topic of considerable research interest in the engineering seismology is to predict a suitable ground motion for seismic evaluation of a structure or earthquake risk assessment of a designated site.
This study uses the discrete Fourier transform method to predict seismic ground motion of a recording site. The accelerograms at the recording site are divided into four sites according to which the location of epicenter, and for each site the suitable distributions of probability density function are selected to model Fourier spectrum and group delay time with the associated parameters being regressed as function of earthquake magnitude. Thus, with the given magnitude, predicted accelerograms can be generated using the inverse Fourier transform.
The earthquake records with magnitudes equal to or greater than 5.0 from the Jr-Nan Temple Station in Taipei are selected for this study. For the Jr-Nan Temple Station, the following conclusions can be drawn：（1）the Fourier spectrum of records can be modeled as a lognormal probability density function；（2）separated frequency range into ten intervals group delay time of records can be modeled as a normal probability density function in each interval；（3）if more records with the epicenters located within small region are available, the accuracy of the predicted motion originated from that region can be enhanced；（4）if two regions have the same numbers of epicenter, the accuracy of the predicted ground motion originated from the region with epicenters spread over a small area will be better. |
| 參考文獻 |
[1] Papoulis, The Fourier Integral and Its Application, McGraw-Hill, New York (1962).
[2] P. C. Jennings, G. W. Housner and N. C. Tsai, “Simulated earthquake motions”. Earthquake Engineering Research Laboratory, California Institute of Technology (1968).
[3] Y. Ohsaki, “On the significance of phase content in earthquake ground motions”. Earthquake Engineering & Structural Dynamics 7, 427-439 (1979).
[4] T. Satoh, T. Sato, T. Uetake, and Y. Sugawara, “A Study on Envelop Characteristics of Strong Motions in a Period of 1 to 15 Seconds by Using Group Delay Time”. Proceedings of the 11th World Conference on Earthquake Engineering, Paper No. 149 (1996).
[5] H. Thráinsson, A. S. Kiremidjian, and S. R. Winterstein, “Modeling of earthquake ground motion in the frequency domain”. Technical Report 134, The John A. Blume Earthquake Engineering Center, Department of Civil and Environmental Engineering, Stanford University, Stanford, California, USA (2000).
[6] E. Oran Brigham, The fast Fourier transform and its applications, Englewood Cliffs, N.J Prentice Hall (2001).
[7] J. F. Chai, C. H. Loh, and T. Sato, “Modeling of phase spectrum to simulation design ground motions”. Journal of the Chinese Institute of Engineers, Vol. 25, No. 4, pp. 447-159 (2002).
[8] H. Thráinsson, and A. S. Kiremidjian, “Simulation of digital earthquake accelerograms using the inverse discrete Fourier transform”. Earthquake Engineering & Structural Dynamic, 31, 2023-2048 (2002).
[9] V. Montaldo, A. S. Kiremidjian, H. Thráinsson, and G. Zonno, “Simulation of the Fourier phase spectrum for the generation of synthetic accelerograms”, Journal of Earthquake Engineering, Vol. 7, No. 3, 427-445 (2003).
[10] 和泉正哲，勝昌裕，「地震動相位角之基本研究 」，日本建築學會論文報告集，第327號，昭和五十八年五月 (日文)。
[11] 理論地震動研究會，「地震動的合成與波形處理」，鹿島出版會，一九九四年二月二十八日。
[12] 黃炯憲、盧煉元、葉公贊、葉錦勳等，「宜蘭農工教學大樓之地震資料整理及初步分析」，國家地震工程研究中心，台北市，民國八十三年六月五日。
[13] 徐義人，「工程機率統計學」，國立編譯館，民國八十八年七月。 |
[Endnote RIS 格式]
[相關文章]
[文章引用]
[完整記錄]
[館藏目錄]
[檢視]
plurk
funp
live
udn
HD
myshare
netvibes
friend
youpush
delicious
baidu
Google bookmarks
del.icio.us
hemidemi
facebook
twitter
google
reddit