Author(s)

Yushi Wang ^1,2, Weimin Ping ¹, Zhuo Song ¹, Yi Ding ¹, Lin Wang ¹

Affiliation(s)

¹ College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, 100124, China
² Key Laboratory of Earthquake Forecasting and Risk Assessment, Ministry of Emergency Management, Beijing, 100136, China

Corresponding Author

Yushi Wang

ABSTRACT

Quickly obtaining the distribution of the earthquake impact field after the earthquake can bring great guidance to the earthquake emergency rescue work, and can also provide a reference basis for the command department to make decisions. Local site conditions often lead to anomalous areas in the earthquake impact field, so it is necessary to find a method to map the impact field considering local site conditions.In this paper, based on 91334 strong vibration records from 1103 earthquakes acquired by the KiK-net network in Japan, the horizontal acceleration response spectrum Sa is calculated for each strong vibration record, and the prediction of the bedrock acceleration response spectrum in the period range of 0.01-20 s can be obtained by using a single earthquake to independently fit the bedrock attenuation relationship in order to address the problem of the difficulty in separating the seismic difference from the site effect of the traditional attenuation model. Then the station amplification factor based on the bedrock layer of the current earthquake can be separated.Correlation analysis is carried out, and the results show that the amplification factor is mainly affected by topographic and geomorphic parameters such as elevation, ground slope, distance to the mountain and TRI. Based on the topographic and geomorphologic parameters, multivariate nonlinear regression is carried out to establish the empirical statistical relationship of amplification coefficients for single earthquakes and single cycle points, so as to obtain the predicted values of acceleration response spectra at any point and to map the earthquake impact field at any cycle. The validation of K-net station data on 8201 sedimentary soil sites shows that the median Jaccard similarity coefficient of the predicted acceleration response spectra of the empirical formula with the station measured records reaches 0.71, which is better than the kriging method and the inverse distance weighting method.

KEYWORDS

Earthquake impact field; acceleration response spectra; localized site conditions; attenuation relationships; KiK-net

CITE THIS PAPER

Yushi Wang, Weimin Ping, Zhuo Song, Yi Ding, Lin Wang, Research on the generation method of post-earthquake ground shaking impact field based on measured records. Journal of Civil Engineering and Urban Planning (2025) Vol. 7: 97-108. DOI: http://dx.doi.org/10.23977/jceup.2025.070113.

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