Research on the influence of the number of input ground motion on soil seismic response
Taking an actual project in Chengdu as an example,using one-dimensional equivalent linearization method,the calculation of soil earthquake response under the different numbers of the input ground motion has been carried out.The following conclusions are obtained:1)By calculating and analyzing the seismic response results,the variation coefficient of each parameter and the variation rule with probability are obtained,and the mean value of each parameter is verified to obey normal distribution.2)For Category II and earthquake microzonation work,the general practice of three bedrock seismic waves for soil seismic response analysis can not meet the practical demands at present,and the lower limit of three seismic waves for soil seismic response analysis in the current seismic safety assessment standard is not adequate.It is recommended that at least 15 independent synthetic bedrock seismic waves should be used as the input ground motion in soil seismic response.
input ground motionsample numberground motion parameterdiscretenessnational standard lower limit
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