Discriminant Criterion of Long-period Ground Motion in Basin

LIU Shuoyu, LI Yingmin

Abstract

 To screen out the basin long-period ground motion inputs, which could be used for the seismic design of supper high-rise buildings in basin, the formation mechanism of long-period ground motions was explained. Then, the dominance of surface wave in long-period ground motion was analyzed, and an approach to extract the coda waves of ground motions, which were dominated by surface waves, was put forward. Finally, the discriminant criterion of long-period ground motion was proposed through statistical analysis based on the characteristics of coda waves. The results demonstrate that the propagation, overlapping, and frequency-dependent amplification of the surface waves are generated by conversion of body waves at the boundaries of deep sedimentary basins, and plains are the main formation mechanism of long-period ground motions. The surface wave components in the coda waves of long-period ground motions are responsible for the maximum responses of long-period structures, such as supper high-rise buildings. The discriminant criterion of long-period ground motion is concluded that: the predominant period of velocity response spectrum (Tp) of ground motion is larger than 2 s, in addition, the ratio of the amplitude in the predominant period of velocity response spectrum associated with the extracted coda waves and original wave is greater than 85%.

 

Keywords: long period ground motion,  formation mechanisms,  discriminant criterion,  surface wave,  ground motion inputs,  predominant period of response spectrum


Full Text:

PDF


References


HISADA Y. YAMASUITA T. MURAKAMI M, et al. Seismic response and damage of high-rise buildings in Tokyo. Japan. during the 2011 Tohoku earthquake [C]//Proceedings of the 15th World Conference on Earthquake Engineering. Toky-o: IAEE. 2012: no. 4096.

TAKEWAKI I. MURAKAMI S. FUJITA K. et al. The 2011 off the Pacific coast of Tohoku earthquake and response of highrise buildings under long-period ground motions [J]. Soil Dynamics and Earthquake Engineering. 2011. 31(11): 1511-1528.

TAKEWAKI I. FUJITA K. YOSHITOMI S. Uncertainties in long-period ground motion and its impact on building structural design; case study of the 2011 Tohoku (Japan) earthquake [J]. Engineering Structures. 2013» 49(13): 119-134.

XIAO C Z. XU P F. DU Y X, et al. Another controlling method on long-period seismic responses for super high-rise buildings [J]. China Civil Engineering Journal. 2014. 47(2): 12 - 22. (In Chinese)

LI C G. Study on site dynamic characteristics of Weihe basin based on Wenchuan strong earthquake data [D]. Harbin: Institute of Engineering Mechanics. China Earthquake Administration, 2013; 1 - 5. (In Chinese)

LI Q S. ZHI L H. TUAN A Y. et al. Dynamic behavior of Taipei 101 Tower: field measurement and numerical analysis [J]. Journal of Structural Engineering, ASCE. 2011. 137( 1); 143-155.

KOKETSU K, HATAYAMA K. FURUMURA T, et al. Damaging long-period ground motions from the 2003 Mw 8. 3 Tokachi-oki. Japan earthquake [J]. Seismological Research Letters. 2005. 76( 1): 67-73.

FURUMURA T. HAYAKAWA T. Anomalous propagation of long-period ground motions recorded in Tokyo during the 23 October 2001 Mw 6. 6 Niigata-ken Chuetsu. Japan. Earthquake [J]. Bulletin of the Seismological Society of America. 2007. 97(3): 863-880.

MAEDA T. SASATANI T. Long-period ground motions from the 2003 Tokachi-oki earthquake [j]. Journal of Seismology. 2007. 12(2): 213-253.

SATO K. ASANOK. IWAT AT. Long-period ground motion characteristics of the Osaka sedimentary Basin during the 2011 Great Tohoku Earthquake [ C ]//Proceedings of the 15th World Conference on Earthquake Engineering. Tokyo: IAEE 2012: no. 4494.

YOSHIMOTO K. TAKEMURA S. A study on the predominant period of long-period ground motions in the Kanto Basin. Japan [J]. Earth. Planets and Space. 2014. 66(1): I-7.

JAPAN METEOROLOGICAL AGENCY. The gradations and relevant explanations of long period ground motion[EB/OL]// (2013-3-15) [2016-9-1 ]. http://www. data. jma. go. jp/svd/eew data/ltpgm_ex-plain/kaisetsu. Html. (In Chinese)


Refbacks

  • There are currently no refbacks.