Structure Observation & Identification Considering Soil-Structure Interaction of Story Stiffness and Damping Ratio of 8-Story Steel Encased Reinforce Concrete Structure by Microtremor

Abstract:

In this article, the authors identify the one built in 1998, eight-story structure of steel reinforced concrete body dynamic parameters, and discussed the soil - structure interaction on the identification results.In this study, an 8 degrees of freedom analytical model and the impact analysis model of soil-structure interaction to be established; through the analysis of microseismic observations, using non-parametric (transfer function and Random Decrement method) and parameter techniques (off-line system identification method, ARX :Auto-Regression with eXtra input) to identify the structure of the natural frequency, damping ratio and the story stiffness. Finally, in considering the soil-structure interaction cases, structural parameters were identification and compared the results to confirm the impact of soil-structure interaction.

• Periodical: Applied Mechanics and Materials (Volumes 166-169)
• Pages: 1399-1403
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.166-169.1399
• Online since: May 2012
• Authors: Jun Ren, Koichi Morita, Ji Shun Pan
• Keywords: Damping Ratio, Microtremor Measure, Soil-Structure Interaction (SSI), Story Stiffness, System Identification

References

[1] Akira Mita,. Structural dynamics for health monitoring [M]. Nagoya, (Japan): Sankeisha co., Ltd, 2003.

[2] Douglas E. Adams, Health monitoring of structural materials and components [M]. New York, (USA): John Wiley & Sons, Ltd , 2007.

[3] Ljung, L. System identification-theory for the user [M]. Upper Saddle River, (NJ): PTR Prentice Hall,. 1999.

[4] Moore SM, LAI JCS, Shankar K. ARMAX modal parameter identification in the presence of unmeasured excitation–II: Numerical and experimental verification [J]. Mechanical Systems and Signal Processing, 2007, 21(4): 1601-1615.

DOI: 10.1016/j.ymssp.2006.07.004

[5] S.D. FASSOIS. MIMO LMS- ARMAX identification of vibrating structures-Part I: The method [J]. Mechanical Systems and Signal Processing, 2001, 15(4): 723 - 735.

DOI: 10.1006/mssp.2000.1382

[6] A. FLORAKIS, S.D. FASSOIS, F.M. HEMEZ. MIMO LMS- ARMAX identification of vibrating structures Part II: A critical assessment [J]. Mechanical Systems and Signal Processing, 2001, 15(4): 737- 758.

DOI: 10.1006/mssp.2000.1385

[7] Penrose, R. A generalized inverse for matrices proc [J]. Cambridge Phil. Soc, 1955, 51: 406-413.

DOI: 10.1017/s0305004100030401