NDLI: Structural time-invariant modal parameters identification from seismic response data

Content Provider	IEEE Xplore Digital Library
Author	Maosheng Gong Jing Sun Kashima, T. Lili Xie
Copyright Year	2010
Description	Author affiliation: Institute of Engineering Mechanics, China Earthquake Administration, Harbin, China (Maosheng Gong) \|\| Institute of Civil Engineering, Heilongjiang University, Harbin, China (Kashima, T.) \|\| School of Civil Engineering, Harbin Institute of Technology, China (Lili Xie) \|\| International Institute of Seismology and Earthquake Engineering, BRI, Tsukuba, Japan (Jing Sun)
Abstract	The time-invariant modal parameters of a 5-story building are identified from the seismic response time histories in 3 earthquakes by using off-line system identification method ARX model, and all the parameters are compared to find out the parameter changes and the seismic damage information primarily. The results show that the modal parameters of the structure can be identified accurately and easily by using the ARX method, and the structural parameters of the building before and after damage can be obtained from the two small earthquake response data before and after the main shock. The parameters identified from the data in the main shock are similar to the results from the data in the aftershock, but different with the results from the data in the small earthquake just before the main shock. It is found that the modal frequencies and equivalent stiffness decrease but the damping ratios increase after the main shock. From the results, it can be concluded that the building are damaged in the main shock. The results can be referenced by the seismic damage detection, diagnosis, and related tasks.
Starting Page	3430
Ending Page	3434
File Size	417154
Page Count	5
File Format	PDF
ISBN	9781424459582
e-ISBN	9781424459612
DOI	10.1109/ICNC.2010.5582844
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-10
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Damping time-invariant response Earthquakes Buildings Measurement uncertainty Transfer functions seismic response record System identification modal parameter Mathematical model system identification pattern recognition
Content Type	Text
Resource Type	Article

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