Computers and Concrete

  • 제12권6호
  • /
  • Pages.803-818
  • /
  • 2013
  • /
  • 1598-8198(pISSN)
  • /
  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Analytical and experimental modal analyses of a highway bridge model

  • Altunisik, Ahmet Can (Department of Civil Engineering, Karadeniz Technical University) ;
  • Bayraktar, Alemdar (Department of Civil Engineering, Karadeniz Technical University) ;
  • Sevim, Baris (Department of Civil Engineering, Yildiz Technical University)
  • 투고 : 2012.12.19
  • 심사 : 2013.08.31
  • 발행 : 2013.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, analytical and experimental modal analyses of a scaled bridge model are carried out to extract the dynamic characteristics such as natural frequency, mode shapes and damping ratios. For this purpose, a scaled bridge model is constructed in laboratory conditions. Three dimensional finite element model of the bridge is constituted and dynamic characteristics are determined, analytically. To identify the dynamic characteristics experimentally; Experimental Modal Analyses (ambient and forced vibration tests) are conducted to the bridge model. In the ambient vibration tests, natural excitations are provided and the response of the bridge model is measured. Sensitivity accelerometers are placed to collect signals from the measurements. The signals collected from the tests are processed by Operational Modal Analysis; and the dynamic characteristics of the bridge model are estimated using Enhanced Frequency Domain Decomposition and Stochastic Subspace Identification methods. In the forced vibration tests, excitation of the bridge model is induced by an impact hammer and the frequency response functions are obtained. From the finite element analyses, a total of 8 natural frequencies are attained between 28.33 and 313.5 Hz. Considering the first eight mode shapes, these modes can be classified into longitudinal, transverse and vertical modes. It is seen that the dynamic characteristics obtained from the ambient and forced vibration tests are close to each other. It can be stated that the both of Enhanced Frequency Domain Decomposition and Stochastic Subspace Identification methods are very useful to identify the dynamic characteristics of the bridge model. The first eight natural frequencies are obtained from experimental measurements between 25.00-299.5 Hz. In addition, the dynamic characteristics obtained from the finite element analyses have a good correlation with experimental frequencies and mode shapes. The MAC values obtained between 90-100% and 80-100% using experimental results and experimental-analytical results, respectively.

키워드

참고문헌

  1. Altunisik, A.C. (2010), "Determination of structural behavior of highway bridges using analytical and experimental methods", Ph.D. Thesis, Karadeniz Technical University, Trabzon, Turkey.
  2. Altunisik, A.C., Bayraktar, A., Sevim, B., Kartal, M.E. and Adanur, S. (2010), "Finite element model updating of an arch type steel laboratory bridge model using semi-rigid connection", Steel Compos. Struct., 10(6), 543-563.
  3. Altunisik, A.C., Bayraktar, A., Sevim, B. and Ates, S. (2011a), "Ambient vibration based seismic evaluation of isolated Gulburnu Highway Bridge", Soil Dyn. Earthq. Eng., 31(11), 1496-1510. https://doi.org/10.1016/j.soildyn.2011.05.020
  4. Altunisik, A.C., Bayraktar, A., Sevim, B. and Ozdemir, H. (2011b), "Experimental and analytical system identification of eynel arch type steel highway bridge", J. Constr. Steel Res., 67(12), 1912-1921. https://doi.org/10.1016/j.jcsr.2011.06.008
  5. Bagchi, A. (2005), "Updating the mathematical model of a structure using vibration data", Vib. Control, 11(12), 1469-1486. https://doi.org/10.1177/1077546305060158
  6. Bayraktar, A., Altunisik, A.C., Sevim, B. and Turker, T. (2007), "Modal testing and finite element model calibration of an arch type steel footbridge", Steel Compos. Struct., 7(6), 487-502. https://doi.org/10.12989/scs.2007.7.6.487
  7. Bayraktar, A., Altunisik, A.C., Sevim, B., Turker, T., Domaniç, A. and Tas, Y. (2009), "Vibration characteristics of Komurhan Highway Bridge constructed with balanced cantilever method", J. Perform. Constr. Fac. ASCE, 23(2), 90-99. https://doi.org/10.1061/(ASCE)0887-3828(2009)23:2(90)
  8. Bayraktar, A., Altunisik, A.C., Sevim, B. and Turker, T. (2010a), "Finite element model updating of Komurhan Highway Bridge based on experimental measurements", Smart Struct. Syst., 6(4), 373-388. https://doi.org/10.12989/sss.2010.6.4.373
  9. Bayraktar, A., Altunisik, A.C., Sevim, B. and Turker, T. (2010b), "Earthquake behaviour of Komurhan Highway Bridge using validated finite element model", J. Test. Eval., 38(4), 467-481.
  10. Bendat, J.S. and Piersol, A.G. (2004), Random Data: Analysis and Measurement Procedures, John Wiley and Sons, USA.
  11. Brincker, R., Zhang, L. and Andersen, P. (2000), "Modal identification from ambient responses using frequency domain decomposition", 18th International Modal Analysis Conference, San Antonio, USA.
  12. Cantieni, R. (2004), "Experimental methods used in system identification of civil engineering structures", 2nd Workshop Problemi di Vibrazioni nelle Strutture Civili e nelle Costruzioni Meccaniche, Perugia.
  13. Cantieni, R. (2005), "Experimental methods used in system identification of civil engineering structures", 1st International Operational Modal Analysis Conference, Copenhagen, Denmark, 249-260.
  14. Donmez, C. and Karakan, E. (2009), "Applications of experimental modal analysis for bridges", Teknik Dergi, 318, 4851-4863.
  15. Ewins, D.J. (1984), Modal Testing: Theory and Practice, England: Research Studies Press Ltd.
  16. Jacobsen, N.J., Andersen, P. and Brincker, R. (2006), "Using enhanced frequency domain decomposition as a robust technique to harmonic excitation in operational modal analysis", Proceedings of ISMA2006: International Conference on Noise & Vibration Engineering, Leuven, Belgium.
  17. Juang, J.N. (1994), Applied System Identification, Englewood Cliffs (NJ), Prentice-Hall Inc.
  18. Liu, C., DeWolf, J.T. and Kim, J.H. (2009), "Development of a baseline for structural health monitoring for a curved post-tensioned concrete box-girder bridge", Eng. Struct., 31, 3107-3115. https://doi.org/10.1016/j.engstruct.2009.08.022
  19. OMA (2006), Operational Modal Analysis, Release 4.0, Structural Vibration Solutions A/S, Denmark.
  20. Peeters, B. (2000), System Identification and Damage Detection in Civil Engineering, Ph.D. Thesis, K.U, Leuven, Belgium.
  21. Peeters, B. and DeRoeck, G. (1999), "Reference based stochastic subspace identification in civil engineering", Proceedings of the 2nd International Conference on Identification in Engineering Systems, Swansea, UK.
  22. PULSE (2006), Analyzers and Solutions, Release 11.2, Bruel and Kjaer, Sound and Vibration Measurement A/S, Denmark.
  23. Ren, W.X., Sun, Z.S., Xia, Y., Hao, H. and Deeks, A.J. (2008), "Damage identification of shear connectors with wavelet packet energy: laboratory test study", J. Struct. Eng. ASCE, 134(5), 832-841. https://doi.org/10.1061/(ASCE)0733-9445(2008)134:5(832)
  24. Ren, W.X., Zhao, T. and Harik, I.E. (2004), "Experimental and analytical modal analysis of steel arch bridge", J. Struct. Eng. ASCE, 130, 1022-1031. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:7(1022)
  25. Reynders, E. and Roeck, G.D. (2008), "Reference-based combined deterministic-stochastic subspace identification for experimental and operational modal analysis", Mech. Syst. Signal Pro., 22, 617-637. https://doi.org/10.1016/j.ymssp.2007.09.004
  26. Roeck, G.D., Peeters, B. and Ren, W.X. (2000), "Benchmark study on system identification through ambient vibration measurements", 18th International Modal Analysis Conference, San Antonio, USA, 1106-1112.
  27. Sanayei, M. and DiCarlo, C. (2009), "Finite element model updating of scale bridge model using measured modal response data", Proceedings of 2009 Structures Congress, Austin, Texas, April - May.
  28. SAP2000. (1998), Integrated Finite Element Analysis and Design of Structures, Computers and Structures Inc., Berkeley, California, USA.
  29. Schwarz, B.J. and Richardson, M.H. (1999), "Experimental modal analysis", CSI Reliability Week, Orlando, FL, October.
  30. Van Overschee, P. and DeMoor, B. (1996), Subspace Identification for Linear Systems: Theory, Implementation and Applications, Kluwer Academic Publishers, Dordrecht, Netherland.
  31. Whelan, M.J., Gangone, M.V., Janoyan, K.D. and Jha, R. (2009), "Real-time wireless vibration monitoring for operational modal analysis of an integral abutment highway bridge", Eng. Struct., 31, 2224-2235. https://doi.org/10.1016/j.engstruct.2009.03.022
  32. Yu, D.J. and Ren, W.X. (2005), "EMD-based stochastic subspace identification of structures from operational vibration measurements", Eng. Struct., 27, 1741-1751. https://doi.org/10.1016/j.engstruct.2005.04.016
  33. Zapico, J.L., Gonzalez, M.P., Friswell, M.I., Taylor, C.A. and Crewe, A.J. (2003), "Finite element model updating of a small scale bridge", J. Sound Vib., 268, 993-1012. https://doi.org/10.1016/S0022-460X(03)00409-7

피인용 문헌

  1. A numerical-experimental evaluation of beams composed of a steel frame with welded and conventional stirrups vol.22, pp.1, 2013, https://doi.org/10.12989/cac.2018.22.1.027
  2. Blasting Response of a Two-Storey RC Building Under Different Charge Weight of TNT Explosives vol.44, pp.2, 2013, https://doi.org/10.1007/s40996-019-00256-0