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A Study on the Relationship between Seismic Intensity and Spectral Accelerations of Strong Motion

Author: LiMin
Tutor: LiXiaoJun
School: China Seismological Bureau, Institute of Engineering Mechanics
Course: Disaster Prevention and Reduction Engineering and Protective Engineering
Keywords: Seismic intensity Strong ground motion records Acceleration response spectrum Multiple linear analysis Bayes hypothesis testing
CLC: P315
Type: Master's thesis
Year: 2010
Downloads: 199
Quote: 4
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Abstract


After the earthquake, strong motion observation network access to the disaster area distributed stations position strong motion records related to the ground motion parameters can quickly assess the spatial distribution of seismic intensity to quickly determine the extent of the different regions of the affected, especially earthquakes extreme seismic zone distribution range, to provide the basis for the government to carry out emergency rescue and reasonable allocation of the rescue forces, supplies, etc., in order to ensure the timely rescue workers to reach the extreme seismic area search and rescue work to reduce the loss of life and property of the people. To this end, the paper focuses on to determine seismic intensity of ground motion parameters commence the work as follows: 1. Elaborate use of strong motion records given ground motion parameters to quickly obtain seismic intensity distribution of the necessity of the research work. Summarizes reported at home and abroad intensity speed work and proposed a variety of qualitative analysis, quantitative formulation, clear the status quo and development trend of the present study, the use of ground motion parameters to determine the significance of the study of seismic intensity. 2. Finishing our existing strong motion records (Wenchuan earthquake, Ning'er earthquake, the Yao'an earthquake, Yingjiang earthquake, Xinjiang earthquake and Panzhihua earthquakes) and seismic site survey seismic intensity data (current intensity scale, the history of earthquake damage data, etc.) . Intensity isoseismal chart obtained from the earthquake after field damage investigation to find out the the stations location of individual ground motion records information corresponding intensity and strong motion observation stations recorded acceleration data calculated after baseline correction give different cycle acceleration response spectrum. 3. Based on the the above historical seismic intensity data, and the strong ground motion recorded acceleration response spectrum, by multiple linear regression method of statistical analysis, statistical analysis of seismic intensity with different cycle acceleration corresponding relationship between the value of the response spectrum intensity sub-file discrimination law and discriminant method two different cycles acceleration response spectrum method to determine seismic intensity. Bayesian hypothesis testing of these methods, Wenchuan earthquake, the intensity will be determined by the proposed method, based on the assessment of the intensity of the intensity scale with macro-seismic damage intensity compared, the results show that the proposed method can truly reflect the actual earthquake harm. Based on the above calculation, statistics and analysis, this article on a study to determine the intensity of ground motion parameters given some awareness and conclusions, provide a useful reference for the intensity nowcasts work.

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