Steel and Composite Structures

  • 제22권3호
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  • Pages.647-662
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  • 2016
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  • 1229-9367(pISSN)
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  • 1598-6233(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

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Frequency variation in construction stages and model validation for steel buildings

  • Aras, Fuat (Civil Engineering Department, Istanbul Medeniyet University)
  • 투고 : 20160431
  • 심사 : 2016.10.19
  • 발행 : 2016.10.30
⟨ 이전 논문 다음 논문 ⟩

초록

This study aims to monitor the variation of modal frequencies of steel buildings during their construction sequence. In this respect, construction of a steel building is followed by vibration based measurements. The monitored building is a three-story educational building within a building group whose structural system consists of steel moment resisting steel frames and eccentric braces. Five different acceleration measurements in two perpendicular directions are taken on five different construction stages, starting from the erection of the columns and beams ending with the completion of the construction. The recorded measurements are transferred into frequency domain and the dominant frequencies for each case have been determined. The change in the dominant frequencies is evaluated with the existing construction stages and performed constructional works between the stages. The last measurement, performed on the building in service, revealed the first two dominant frequencies as mutual in X and Y direction, showing that these dynamic modes are torsional modes. This result is investigated by numerical analysis performed with finite element model of the building constructed for design purpose. Lower frequencies and different mode shapes are determined from numerical analysis. The reason of lower frequencies is discussed and the vibration survey is extended to determine the effects of an adjacent building. The results showed that the building is in strong relation with an adjoining building in spite of a designed construction joint.

키워드

과제정보

연구 과제 주관 기관 : Istanbul Medeniyet University

참고문헌

  1. Aras, F., Krstevska, L., Altay, G. and Taskov, L. (2001), "Experimental and numerical modal analyses of a historical masonry palace", Construct. Build. Mater., 25(1), 81-91. https://doi.org/10.1016/j.conbuildmat.2010.06.054
  2. Astroza, R., Ebrahimian, H., Conte, J.P., Restrepo, J.I. and Hutchinson, T. (2016), "Influence of the construction process and nonstructural components on the modal properties of a five-story building", Earthq. Eng. Struct. Dyn., 45(7), 1063-1084. https://doi.org/10.1002/eqe.2695
  3. Chellini, G., De Roeck, G., Nardini, L. and Salvatore, W. (2010), "Damage analysis of a steel-concrete composite frame by finite element model updating", J. Construct. Steel Res., 66(3), 398-411. https://doi.org/10.1016/j.jcsr.2009.10.004
  4. Gentile, C., Saisi, A. and Cabboi, A. (2015), "Structural identification of a masonry tower based on operational modal analysis", Int. J. Architect. Heritage: Conserv. Anal. Restor., 9(2), 98-110. https://doi.org/10.1080/15583058.2014.951792
  5. Gul, M. and Catbas, F.N. (2011), "Damage assessment with ambient vibration data using a novel time series analysis methodology", J. Struct. Eng., 137(12), 1518-1526. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000366
  6. Kudu, F.N., Ucak. S., Osmancikli, G., Turker, T. and Bayraktar, A. (2015), "Estimation of damping ratios of steel structures by operational modal analysis method", J. Construct. Steel Res., 112, 61-68. https://doi.org/10.1016/j.jcsr.2015.04.019
  7. Macdonald, J.H.G. and Daniell, W.E. (2005), "Variation of modal parameters of a cable-stayed bridge identified from ambient vibration measurements and FE modeling", Eng. Struct., 27(13), 1916-1930. https://doi.org/10.1016/j.engstruct.2005.06.007
  8. Matlab (2012), The MathWorks, Inc., Natick, MA, USA.
  9. Morassi, A. and Polentarutti, F. (2011), "Dynamic Testing and Structural Identification of the Hypo Bank Office Complex. II: Identification", J. Struct. Eng., 137(12), 1540-1552. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000399
  10. Saisi, A., Gentile, C. and Guidobaldi, M. (2015), "Post-earthquake continuous dynamic monitoring of the Gabbia Tower in Mantua, Italy", Construct. Build. Mater., 81, 101-112. https://doi.org/10.1016/j.conbuildmat.2015.02.010
  11. SAP2000 V17 (2015), Structural analysis program-integrated finite element analysis and design of structures, Analysis Reference, Berkeley, CA, USA.
  12. Sevim, B., Altunisik, A.C. and Bayraktar, A. (2012), "Earthquake behavior of Berke arch dam using ambient vibration test results", J. Perform. Construct. Facil., 26(6), 780-792. https://doi.org/10.1061/(ASCE)CF.1943-5509.0000264
  13. Shakib, H. and Parsaeifard, N. (2011), "Ambient vibration tests on a 19 - story asymmetric steel building", Struct. Eng. Mech., Int. J., 40(1), 1-11. https://doi.org/10.12989/sem.2011.40.1.001
  14. Torkamani, M.A.M. and Ahmadi, A.K. (1988), "Stiffness identification of a tall building during construction period using ambient tests", Earthq. Eng. Struct. Dyn., 16(8), 1177-1188. https://doi.org/10.1002/eqe.4290160806
  15. Turkish Earthquake Code (2007), "Specification for structures to be built in disaster areas", The Ministry of Housing and Settlements, Ankara, Turkey.
  16. Turker, T. and Bayraktar, A. (2011), "Experimental and numerical investigation of brace configuration effects on steel structures", J. Construct. Steel Res., 67(5), 854-865. https://doi.org/10.1016/j.jcsr.2010.12.008

피인용 문헌

  1. Monitoring the dynamic properties of a nine‐story reinforced concrete building during its demolition vol.26, pp.11, 2016, https://doi.org/10.1002/stc.2456
  2. Investigation of effects of dynamic loads in metro tunnels during construction and operation on existing buildings vol.13, pp.11, 2020, https://doi.org/10.1007/s12517-020-05456-x