Application of ARX and RARX Methods in Structural Parameter Identification

摘要：

To diagnose the seismic damage of one 5-story reinforced concrete building under the excitation of great earthquake, the off-line ARX method and recursive on-line RARX method are applied to identify the structural time-invariant and time-varying parameters from its seismic response records. The results show that the time-invariant and time-varying parameters can be determined from the seismic response records by two methods, especially the structural time-varying characteristics can be identified accurately by using on-line RARX method through forgetting factor. Moreover, the structural parameters of the building before and after damage can be obtained from the time-varying parameters, and the seismic damage can be detected from the comparison among the parameters of structural different state. It is also found that the natural frequency decreases gradually until it reaches the lowest point value, and then increases until the end of the earthquake, but can not be recovered to the initial value. The performance of structures could be recovered to a certain extent after the earthquake compared with the most dangerous state when the natural frequency is at the lowest point The results can be referenced by structural damage diagnosis and related tasks.

关键词： structural modal paramter system identification seismic resoosne record ARX model RARX model

作者: Gong Maosheng Toshihide Kashima Sun Jing Xie Lili

作者单位: Institute of Engineering Mechanics China Earthquake Administration Harbin, China International Institute of Seismology and Earthquake Engineering, BRI Tsukuba, Japan Institute of Civil Engineering Heilongjiang University Harbin, China School of Civil Engineering Harbin Institute of Technology Harbin, China

会议类型: 国际会议

会议名称: Third International Conference on Information and Computing(第三届信息与计算科学国际会议 ICIC 2010)

会议地点: 无锡

会议语种:英文

页码: 85-88

在线出版日期: 2010-06-04（万方平台首次上网日期，不代表论文的发表时间）