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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.11 P.1856~1863

http://doi.org/10.1631/jzus.2006.A1856


Study on the applicability of frequency spectrum of micro-tremor and dynamic characteristics of surface ground in Asia area


Author(s):  CHE Ai-lan, IWATATE Takahiro, ODA Yoshiya, GE Xiu-run

Affiliation(s):  School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200030, China; more

Corresponding email(s):   alche@sjtu.edu.cn

Key Words:  Micro-tremor observation, Nakamura method, Predominant period, Earthquake observation, Spectral analysis


CHE Ai-lan, IWATATE Takahiro, ODA Yoshiya, GE Xiu-run. Study on the applicability of frequency spectrum of micro-tremor and dynamic characteristics of surface ground in Asia area[J]. Journal of Zhejiang University Science A, 2006, 7(11): 1856~1863.

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author="CHE Ai-lan, IWATATE Takahiro, ODA Yoshiya, GE Xiu-run",
journal="Journal of Zhejiang University Science A",
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pages="1856~1863",
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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2006.A1856"
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%T Study on the applicability of frequency spectrum of micro-tremor and dynamic characteristics of surface ground in Asia area
%A CHE Ai-lan
%A IWATATE Takahiro
%A ODA Yoshiya
%A GE Xiu-run
%J Journal of Zhejiang University SCIENCE A
%V 7
%N 11
%P 1856~1863
%@ 1673-565X
%D 2006
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.A1856

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T1 - Study on the applicability of frequency spectrum of micro-tremor and dynamic characteristics of surface ground in Asia area
A1 - CHE Ai-lan
A1 - IWATATE Takahiro
A1 - ODA Yoshiya
A1 - GE Xiu-run
J0 - Journal of Zhejiang University Science A
VL - 7
IS - 11
SP - 1856
EP - 1863
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Y1 - 2006
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2006.A1856


Abstract: 
The dynamic characteristics of ground soil using micro-tremor observation in Asia (Zushi and Ogasawara (Japan), Xi’an (China), Manila (Philippines), and Gujarat (India)) are studied. Ground micro-tremor signals were observed and analyzed by fast Fourier transform method (FFT). The response of ground soil to frequency of ground micro-tremor is revealed, and functions with frequency-dependence and frequency-selection of micro-tremor for different foundation soil strata are also researched. The horizontal to vertical spectral ratio (H/V, Nakamura technique) of micro-tremor observed at the surface ground was used to evaluate the site’s predominant period. This paper also discusses the application of micro-tremor on site safety evaluation, and gives the observed calculation results obtained at multiple points. The experimental foundation and the deduction process of the method are described in detail. Some problems of the method are pointed out. Potential use of the technique’s good expandable nature makes it a useable means for preventing and reducing disaster’s harmful effects.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1] Bard, P.Y, 1998. Micro Tremors Measurements, a Tool for Site Effect Estimation. ESG 98 Symposium.

[2] Dowrick, D.J., 1997. Earthquake Resistant Design for Engineers and Architects (Second Ed.). John Wiley & Sons.

[3] Dungca, J.R., 1989. Liquefaction Potential Map of Manila. Graduate Thesis, De La Salle University.

[4] Enomoto, T., Iwatate, T., 2002. Site-effects Evaluation H/V Spectra Comparing Micro-tremor with Strong Motion Records Observed at Ground Surface and Basement Using Borehole. 12th European Conference on Earthquake Engineering.

[5] Guo, M.Z., Ren, F.H., 2005. The microtremor methods for dynamics measurement of sites. World Earthquake Engineering, 21(4):139-142.

[6] Iwatate, T., Santos Dy, S., 2000. Seismic Response Evaluation of Surface Ground of Western Manila. Philippines 6ICSZ, Palm Springs, CA, USA.

[7] JSCE (Japan Society of Civil Engineers), 2001. The 2001 Kutch Earthquake, Gujarat State, India—Investigation into Damage to Civil Engineering Structures.

[8] Matsuda, I., Enomoto, T., Banganan, E.L., Narag, I.C., 1998. Regional division of metro manila on the basis of geological and geomorphologic conditions. Bulletin of Institute of Science and Technology, (25):101-112.

[9] Nakamura, Y., 1989. A method for dynamic characteristics estimation of subsurface using micro tremor on the ground surface. OR or RTR1, 30:25-33.

[10] Rodriguez, V.H.S., Midorikawa, S., 2002. Applicability of the H/V spectral ratio of microtremors in assessing site effects on seismic motion. Earthquake Engineering & Structural Dynamics, 31(2):261-279.

[11] Tan, R., 1983. Engineering Properties of Manila Subsoil. Graduate Thesis, University of the Philippines.

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