[1]XIA Feng,SUN Nan,WEI Fenghai.Influence of Phase Properties of the Input Ground Motion on the Earthquake Response of Different On-site Soil[J].Journal of Seismological Research,2021,44(04):656-664.
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Influence of Phase Properties of the Input Ground Motion on the Earthquake Response of Different On-site Soil
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
44
Number of periods:
2021 04
Page number:
656-664
Column:
Public date:
2021-11-10
- Title:
- Influence of Phase Properties of the Input Ground Motion on the Earthquake Response of Different On-site Soil
- Keywords:
- phase properties; site class; ground motion time history; soil earthquake response; sample size``
- CLC:
- P315.914
- DOI:
- -
- Abstract:
- On the basis of the seismic hazard calculation of some bedrock site in Intensity 8 earthquake fortification zone,and using one-dimensional equivalent linearization method,we input the fitted time history of artificial ground motion with different random phases,and calculated the ground response spectrum of Site Class Ⅱ,Ⅲ and Ⅳ.The following conclusions are reached:(1)the earthquake responses of different types of sites are carried out by using bedrock time histories with different seismic intensities and random phases.The difference of relative extrema of the peak ground acceleration values and the response spectrum values calculated is significant.The influence of phase characteristics of the time history of ground motion on the soil earthquake response is innegligible.Within 2.0 s of the characteristic period of the response spectrum,the variation of the ground motion values and the response spectrum values increases with the increase of intensity of input ground motion.(2)the necessary quantity of the time histories with random phases on different sites is calculated by the statistical method.The minimum sample size depends on the following conditions:when the input ground motion is small(PGA<0.20 g),and the variation coefficient of response spectrum is within the range of mean value plus one-fold standard deviation,at least 15 pairs of time histories are needed to meet the average statistics.When the input ground motion is large(PGA≥0.20 g),and the variation coefficient of response spectrum is within the range of mean value plus one-fold standard deviation,30 pairs of time histories are needed to meet the average statistics.
- References:
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Last Update:
2021-11-10