Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 26, No. 10 (October 2013) 1135-1144   

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  WAVELET-BASED ANALYSIS FOR PULSE PERIOD OF EARTHQUAKE GROUND-MOTIONS
 
S. Yaghmaei-Sabegh
 
( Received: January 17, 2013 – Accepted: May 16, 2013 )
 
 

Abstract    Pulse period of earthquake records has been known as a key parameter in seismology and earthquake engineering. This paper presents a detailed characterization of this parameter for a special class of earthquake records called pulse-like ground motions. This type of motions often resulting from directivity effects is characterized by a strong pulse in the velocity time history of motion, in normal-fault component. Wavelet analysis was used as a powerful and useful technique in the analysis of non-stationary signals in this study. The period of velocity pulses is basically determined by using the pseudo-period of the mother wavelets. The effects of three different mother wavelets on results were investigated and new empirical predictive equations for pulse period have been derived.

 

Keywords    Pulse-like ground motions; pulse period; wavelet analysis; directivity effect; magnitude scaling; mother wavelet

 

چکیده    پریود پالس به عنوان پارامتری مهم در زلزله شناسی و مهندسی زلزله به شمار می رود. این مقاله به بررسی مشحصه های کامل این پارامتر درگروه خاصی از زلزله ها بنام حرکت های پالس-گونه می پردازد. این حرکت ها معمولا به دلیل اثرات جهت داری در حوزه نزدیک گسل و در راستای عمود بر گسل بوجود می آید. در این مطالعه تحلیل موجک ها به عنوان ابزاری قوی در تحلیل سیگنالهای نامانا مورد استفاده قرار می گیرد. پریود پالس با استفاده از مفهوم شبه پریود متناظر با موجک مادر محاسبه می شود. اثرات سه موجک مادر مختلف در تخمین پریود پالس بررسی و در انتها رابطه تجربی جدیدی ارائه خواهد شد.

References   

 

1.     Mena, B. and Mai, P. M., "Selection and quantification of near-fault velocity pulses owing to source directivity", Georisk,  Vol. 5, No. 1, (2011), 25-43.

2.     Alavi, B. and Krawinkler, H., "Design considerations for near-fault ground motions", in Proceedings of the US–Japan Workshop on the Effects of Near-Fault Earthquake Shaking., (2000), 20-21.

3.     Krawinkler, H. and Alavi, B., "Development of improved design procedures for near-fault ground motions", in SMIP98, seminar on utilization of strong motion data, Oakland, CA., (1998).

4.     Somerville, P. G., "Magnitude scaling of the near fault rupture directivity pulse", Physics of the Earth and Planetary Interiors,  Vol. 137, No. 1, (2003), 201-212.

5.     Somerville, P., "Development of an improved representation of near fault ground motions", in SMIP98 Seminar on Utilization of Strong-Motion Data. Vol. 15, (1998).

6.     Rodriguez-Marek, A., "Near-fault seismic site response"., University of California. (2000)

7.     Bray, J. D. and Rodriguez-Marek, A., "Characterization of forward-directivity ground motions in the near-fault region", Soil Dynamics and Earthquake Engineering,  Vol. 24, No. 11, (2004), 815-828.

8.     Mavroeidis, G. P. and Papageorgiou, A. S., "A mathematical representation of near-fault ground motions", Bulletin of the Seismological Society of America,  Vol. 93, No. 3, (2003), 1099-1131.

9.     Chanerley, A. and Alexander, N., "Obtaining estimates of the low-frequency ‘fling’, instrument tilts and displacement timeseries using wavelet decomposition", Bulletin of Earthquake Engineering,  Vol. 8, No. 2, (2010), 231-255.

10.   Yaghmaei-Sabegh, S., "Detection of pulse-like ground motions based on continues wavelet transform", Journal of seismology,  Vol. 14, No. 4, (2010), 715-726.

11.   Duan, Z., Ou, J. and Yan, G., "Structural damage detection in ambient vibration using wavelet packet transform and probabilistic neural networks", in Proceedings of the 2nd International Workshop on Structural Health Monitoring of Innovative Civil Structures, Winnipeg, Canada. (2004), 477-488.

12.   Mollaioli, F. and Bosi, A., "Wavelet analysis for the characterization of forward-directivity pulse-like ground motions on energy basis", Meccanica,  Vol. 47, No. 1, (2012), 203-219.

13.   Gholizadeh, S. and Samavati, O., "Structural optimization by wavelet transforms and neural networks", Applied Mathematical Modelling,  Vol. 35, No. 2, (2011), 915-929.

14.   Amiri, G. G. and Asadi, A., "Comparison of different methods of wavelet and wavelet packet transform in processing ground motion records", International Journal of Civil Engineering,  Vol. 7, No. 4, (2009), 248-257.

15.   Lockwood, O. G. and Kanamori, H., "Wavelet analysis of the seismograms of the 2004 sumatraandaman earthquake and its application to tsunami early warning", Geochemistry, Geophysics, Geosystems,  Vol. 7, No. 9, (2006).

16.   Pan, T. C. and Lee, C. L., "Application of wavelet theory to identify yielding in seismic response of bilinear structures", Earthquake Engineering & Structural Dynamics,  Vol. 31, No. 2, (2002), 379-398.

17.   Haigh, S., Teymur, B., Madabhushi, S. and Newland, D., "Applications of wavelet analysis to the investigation of the dynamic behaviour of geotechnical structures", Soil Dynamics and Earthquake Engineering,  Vol. 22, No. 9, (2002), 995-1005.

18.   Vassiliou, M. F. and Makris, N., "Estimating time scales and length scales in pulselike earthquake acceleration records with wavelet analysis", Bulletin of the Seismological Society of America,  Vol. 101, No. 2, (2011), 596-618.

19.   Quek, S.-T., Wang, Q., Zhang, L. and Ang, K.-K., "Sensitivity analysis of crack detection in beams by wavelet technique", International journal of mechanical sciences,  Vol. 43, No. 12, (2001), 2899-2910.

20.   Maheswaran, R. and Khosa, R., "Comparative study of different wavelets for hydrologic forecasting", Computers & Geosciences,  Vol. 46, No., (2012), 284-295.

21.   Newland, D. E., "An introduction to random vibrations, spectral and wavelet analysis", DoverPublications. com,  (2012).

22.   Baker, J. W., "Quantitative classification of near-fault ground motions using wavelet analysis", Bulletin of the Seismological Society of America,  Vol. 97, No. 5, (2007), 1486-1501.

23.   Champion, C. and Liel, A., "The effect of nearfault directivity on building seismic collapse risk", Earthquake Engineering & Structural Dynamics,  Vol. 41, No. 10, (2012), 1391-1409.

24.   Yaghmaei-Sabegh, S., "Inelastic time history analysis of steel moment frames subjected to pulse-like ground motions", in Tenth International Conference on Computational Structures Technology. Vol., No., (2010).

25.   Tothong, P. and Cornell, C. A., "Structural performance assessment under nearsource pulselike ground motions using advanced ground motion intensity measures", Earthquake Engineering & Structural Dynamics,  Vol. 37, No. 7, (2008), 1013-1037.

26.   Kalkan, E. and Kunnath, S. K., "Effects of fling step and forward directivity on seismic response of buildings", Earthquake Spectra,  Vol. 22, No. 2, (2006), 367-390.

27.   Krawinkler, H., Medina, R. and Alavi, B., "Seismic drift and ductility demands and their dependence on ground motions", Engineering Structures,  Vol. 25, No. 5, (2003), 637-653.

28.   MacRae, G. A., Morrow, D. V. and Roeder, C. W., "Near-fault ground motion effects on simple structures", Journal of Structural Engineering,  Vol. 127, No. 9, (2001), 996-1004.

29.   Hall, J. F., Heaton, T. H., Halling, M. W. and Wald, D. J., "Near-source ground motion and its effects on flexible buildings", Earthquake Spectra,  Vol. 11, No. 4, (1995), 569-605.

30.   Yaghmaei-Sabegh, S. and Tsang, H., "An updated study on near-fault ground motions of the 1978 tabas, iran, earthquake (mw= 7.4)", Scientia Iranica,  Vol. 18, No. 4, (2011), 895-905.

31.   Chioccarelli, E. and Iervolino, I., "Near-source seismic demand and pulse-like records: A discussion for l’aquila earthquake", Earthquake Engng Struct. Dyn,  Vol. 39, No., (2010), 1039-1062.

32.   Hwang, R.-D., Yu, G.-K. and Wang, J.-H., "Rupture directivity and source-process time of the september 20, 1999 chi-chi, taiwan, earthquake estimated from rayleigh-wave phase velocity", Earth Planets and Space,  Vol. 53, No. 12, (2001), 1171-1176.

33.           Ejiri, J., Goto, Y. and Toki, K., "Peak ground motion characteristics of kobe earthquake and extracted simple evaluation method", in 12th World Conference on Earthquake Engineering (12WCEE), New Zealand, (2000).  





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