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《Journal of Earthquake Engineering and Engineering Vibration》 2013-01
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Study on characteristics of time-varying parameters of reinforced concrete frame structure

PEI Qiang1,WANG Li1,QUAN Houhui2(1.Research & Development Center of Civil Engineering Technology,Dalian University,Dalian 116622,China; 2.College of Civil Engineering and Architecture,Dalian University,Dalian 116622,China)  
Based on the shaking table model test data of a 12-story RC-frame structure,the time-varying characteristics of standard frame structural parameters are researched in this paper by using the combination of Kalman filter and mobile spectrum.The results are precise.It is found that the frequency gets a very slight reduction when the model structure is under the excitation of small earthquakes.This indicaties that tiny damage which is not founded is located in the structure.The frequency of the structure is greatly reduced compared to that at the initial moment under the large earthquake excitation.It is shown that there is severe damage in the structure.By the comparison with component analysis and theoretical solution,the recognition results by using the proposed method is closer to the theoretical solution.
【Fund】: 国家自然科学基金项目(50908027);; 地震工程与工程振动开放实验室项目(2009A10)
【CateGory Index】: TU375.4
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