Attenuation relationship of long period ground motion response spectrum of horizontal bedrock in western United States

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (19) : 254-260.

XIAO Liang, YU Yanxiang

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Abstract

Based on the newly supplemented broadband velocity response records of bedrock in the western United States, the long period (T=3-10 s) part of 5% damping ratio seismic response spectrum attenuation relationship of horizontal bedrock was re-fitted, and it was connected with the short period (T=0.04-6.00 s) part near the period of 2.0 s. Based on the new obtained attenuation model in the long period range of 0.04-10.00 s, discrete standard deviation and far-field normalized response spectrum characteristics were analyzed. The technical method and strong earthquake data set used in the new obtained attenuation relationship were consistent to those used in the seismic parameter zonation map of China (GB 18306—2015) with the applicable range of Ms5.0-8.0 and the epicentral distance of 0-500 km.

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strong ground motion / attenuation relationship / horizontal ground motion / long period response spectrum

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XIAO Liang, YU Yanxiang. Attenuation relationship of long period ground motion response spectrum of horizontal bedrock in western United States[J]. Journal of Vibration and Shock, 2021, 40(19): 254-260

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