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Seismic Risk Analysis of Baoji City

Author: HeFangFang
Tutor: SunJinZhong
School: Chinese Geology University (Beijing)
Course: Geotechnical Engineering
Keywords: Baoji City Seismic hazard analysis Reproduce the relations Attenuation relationship Earthquake impact assessment
CLC: P315.9
Type: Master's thesis
Year: 2011
Downloads: 80
Quote: 1
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Abstract


Uncertainty consider the earthquake, the evaluation earthquake affected a region likely to suffer in the future has important significance for the earthquake-proof, earthquake disaster mitigation. Baoji City is located in the Weihe River basin, South Qinling Mountains, north of the Loess Plateau, so landform type characteristic earthquake potential threat to the seismic risk evaluation is an important task for the assessment of geological disasters in Baoji City. Line with the the Baoji loess slope seismic stability evaluation, on the basis of the national seismic intensity zoning to further consider the contribution of the regional geological structures for seismic attenuation earthquake analysis Baoji City may suffer in the future. The Baoji City North Slope, consider a radius of 150km of range as Baoji City earthquake affected zone. Full gathering of the regional geological structure and history of seismic data based on the statistical analysis of the potential epicenter of the earthquake Baoji City earthquake affected region reproduce the relations (Magnitude - frequency relationship) and in all directions on the ground motion attenuation laws. Based on seismic wave propagation principle and in different directions reverse seismic intensity attenuation relationship, the formation of the seismic intensity attenuation law of the of Baoji City center direction. Empirical relationship based on the intensity of earthquakes and seismic peak acceleration, the intensity attenuation further conversion Baoji City earthquake affected zone of bedrock peak acceleration attenuation relationship. Through the study seismic attenuation relationship has been fully embodies the control and influence of the geological structure of the earthquake-affected zone of seismic attenuation law. On the basis of regional seismic activity, according to the requirements of Baoji City earthquake impact assessment, according to the scale of Baoji City unit mesh. Each grid as an engineering site, the application of probabilistic seismic hazard analysis method All potential focal role in the earthquake affected area cell earthquake peak acceleration beyond the probability to obtain Baoji City, the next period of time beyond probability corresponding to earthquake intensity distribution. This article the Baoji City next 50 years the probability of exceedance bedrock earthquake peak acceleration distribution. On this basis, obtained in Baoji City for the next 50 years, the probability of exceedance of 10% bedrock peak acceleration contours zoning map. These results can Baoji City earthquake impact evaluation and earthquake induced geological hazard assessment to provide a reference.

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CLC: > Astronomy,Earth Sciences > Geophysics > Earth ( rock circles ) physics ( geophysics ) > Seismology > Engineering seismology
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