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《Journal of Disaster Prevention and Mitigation Engineering》 2008-01
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Comparison of Methods of Generation of Spectrum-compatible Artificial Earthquake through the Modification of Available Records

QUAN Wei,LI Hong-nan (State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China)  
Spectrum compatible artificial earthquake through the modification of available records is widely accepted nowadays.There are four methods for the modification,including scaling method,modifying the Fourier amplitude,modification based on wavelet transform,modification through the adding of wavelet functions.In this paper,the theory and the difficulty in fulfillment are discussed in detail. Through the examples,the advantages and disadvantages of the four methods are discussed.When the discrepancy between the code response spectrum and response spectrum of the available record is large,the scaling method is adopted firstly,then one of the other three methods is utilized for the modification.The last three methods can all retain the temporal variations of the original accelerogram to a certain extent.But the method of adding wavelet is the best in precision.Moreover,the corresponding velocity and displacement time history can be obtained without baseline correction.The method of adding wavelet is recommended in practical use.
【Fund】: 教育部创新团队项目(IRT0518)资助
【CateGory Index】: P315.9
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