Browse > Article
http://dx.doi.org/10.12989/sem.2004.17.3_4.429

Output-only modal parameter identification of civil engineering structures  

Ren, Wei-Xin (Department of Civil Engineering, Fuzhou University)
Zong, Zhou-Hong (Department of Civil Engineering, Fuzhou University)
Publication Information
Structural Engineering and Mechanics / v.17, no.3_4, 2004 , pp. 429-444 More about this Journal
Abstract
The ambient vibration measurement is a kind of output data-only dynamic testing where the traffics and winds are used as agents responsible for natural or environmental excitation. Therefore an experimental modal analysis procedure for ambient vibration testing will need to base itself on output-only data. The modal analysis involving output-only measurements presents a challenge that requires the use of special modal identification technique, which can deal with very small magnitude of ambient vibration contaminated by noise. Two complementary modal analysis methods are implemented. They are rather simple peak picking (PP) method in frequency domain and more advanced stochastic subspace identification (SSI) method in time domain. This paper presents the application of ambient vibration testing and experimental modal analysis on large civil engineering structures. A 15 storey reinforced concrete shear core building and a concrete filled steel tubular arch bridge have been chosen as two case studies. The results have shown that both techniques can identify the frequencies effectively. The stochastic subspace identification technique can detect frequencies that may possibly be missed by the peak picking method and gives a more reasonable mode shapes in most cases.
Keywords
modal analysis; parameter identification; ambient vibration; spectra; stochastic subspace identification; engineering structures;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Brownjohn, J.M.W., Dumanoglu, A.A. and Severn, R.T. (1992), "Ambient vibration survey of the Faith SultanMehmet (Second Bosporus) suspension bridge", Earthq. Engrg. Struct. Dyn., 21, 907-924.   DOI
2 Cunha, A., Caetano, E. and Delgado, R. (2001), "Dynamic tests on large cable-stayed bridge", J. Bridge Engrg.,ASCE, 6(1), 54-62.   DOI
3 De Roeck, G., Peeters, B. and Ren, W.X. (2000), "Benchmark study on system identification through ambientvibration measurements," Proc. IMAC-XVIII, the 18th Int. Modal Analysis Conf., San Antonio, Texas, 1106-1112.
4 Ewins, D.J. (1986), Modal Testing: Theory and Practice, Research Studies Press Ltd., England.
5 Ljung, L. (1987), System Identification: Theory for the User. Prentice-Hall Inc., Englewood Cliffs, New Jersey.
6 Ren, W.X., Harik, I.E., Lenett, M. and Basehearh, T. (2001), "Modal properties of the Roebling SuspensionBridge - FEM modeling and ambient testing," Proc. IMAC-XX: A Conf. on Structural Dynamics, Kissimmee,Florida, February 5-8, 1139-1145.
7 Xu, Y.L., Ko, J.M. and Zhang, W.S. (1997), "Vibration studies of Tsing Ma Suspension Bridge", J. BridgeEngrg., ASCE, 2, 149-156.   DOI
8 Abdel-Ghaffer, A.M. and Scanlan, R.H. (1985), "Ambient vibration studies of Golden Gate Bridge. I: Suspended structure", J. of Engrg. Mech., ASCE, 111(4), 463-482.   DOI   ScienceOn
9 James III, G.H., Carne, T.G. and Lauffer, J.P. (1995), "The natural excitation technique (NExT) for modalparameter extraction from operating structures", Int. J. Analytical and Experimental Modal Analysis, 10(4),260-277.
10 Andersen, P., Brincker, R. and Kirkegaard, P.H. (1996), "Theory of covariance equivalent ARMAV models ofcivil engineering structures", Proc. IMAC14, the 14th Int. Modal Analysis Conf., Dearborn, MI, 518-524.
11 Bendat, J.S. and Piersol, A.G. (1993), Engineering Applications of Correlation and Spectral Analysis. 2ndedition, John Wiley & Sons, New York, NY.
12 Dyck, C. and Ventura, C.E. (1998), "Ambient vibration measurements of Heritage Court Tower", U.B.C.Earthquake Engineering Research Report, Department of Civil Engineering, University of British Columbia,Canada.
13 Ren, W.X., Zhao, T. and Harik, I.E. (2003), "Experimental and analytical modal analysis of a steel arch bridge",accepted by Journal of Structural Engineering, ASCE.
14 Chang, C.C., Chang, T.Y.P. and Zhang, Q.W. (2001), "Ambient vibration of long-span cable-stayed bridge", J.Bridge Engrg., ASCE, 6(1), 46-53.   DOI
15 Juang, J.N. (1994), Applied System Identification, Prentice-Hall Inc., Englewood Cliffs, New Jersey.
16 Okauchi, I., Miyata, T., Tatsumi, M. and Sasaki, N. (1997), "Field vibration test of a long span cable-stayedbridge using large exciters", J. Struct. Engrg./Earthquake Engrg., Tokyo, 14(1), 83-93.
17 Van Overschee, P. and De Moor, B. (1996), Subspace Identification for Linear Systems: Theory, Implementationand Applications, Kluwer Academic Publishers, Dordrecht, Netherlands.
18 Peeters, B. and De Roeck, G. (2000), "Reference based stochastic subspace identification in civil engineering",Inverse Problems in Engineering, 8(1), 47-74.   DOI   ScienceOn
19 De Roeck, G. and Peeters, B. (1999), MACEC2.0 - Modal Analysis on Civil Engineering Constructions,Department of Civil Engineering, Catholic University of Leuven, Belgium.
20 Jaishi, B., Ren, W.X., Zong, Z.H. and Maskey, P.N. (2003), "Dynamic and seismic performance of old multitiered temples in Nepal", Engineering Structures, 25(14), 1827-1839.   DOI   ScienceOn