This paper presents the finite element calibration of Berke Arch Dam by using Operational Modal Testing. Achievement of this purpose involves structural vibration characteristics of Berke Arch Dam using analytical and Operational Modal Analyses. Therefore, the study has two parts — analytical and experimental. In the analytical part of the study, the authors developed a 3D finite element model of Berke Arch Dam-reservoir-foundation system using ANSYS software, and analytically determined vibration characteristics such as natural frequencies and mode shapes. In the experimental part of the study, sensitive accelerometers were placed to several points of Berke Arch Dam, and ambient vibration tests were conducted over four days to obtain dynamic characteristics. The Enhanced Frequency Domain Decomposition technique is used to estimate natural frequencies, mode shapes and damping ratios of the Berke Arch Dam experimentally. Results showed that there were some differences between analytical and experimental natural frequencies of the dam. Therefore, an analytical model of Berke Arch Dam was calibrated to minimize these differences by changing material properties. Analytical results obtained from the calibrated model mainly conform to those of the experimental model.
Akköse M., Adanur S., Bayraktar A. and Dumanoğlu AA ( 2008) Elasto-plastic earthquake response of arch dams including fluid-structure interaction by the Lagrangian approach. Applied Mathematical Modelling32(11): 2396-2412.
2.
Alves SW and Hall JF ( 2006) System identification of a concrete arch dam and calibration of its finite element model. Earthquake Engineering and Structural Dynamics35(11): 1321-1337.
3.
Ansys (2008). Swanson Analysis System, USA.
4.
Ashour ON and Nayfeh AH ( 2003) Experimental and numerical analysis of a nonlinear vibration absorber for the control of plate vibrations. Journal of Vibration and Control9: 209-234.
5.
Bayraktar A., Altunışık AC, Sevim B. and Türker T. (2010) Seismic response of a historical masonry minaret using a FE model updated with operational modal testing. Journal of Vibration and Control [in press].
6.
Bayraktar A., Sevim B., Altunışık AC and Türker T (2009) Analytical and operational modal analyses of Turkish style reinforced concrete minarets for structural identification. Experimental Techniques33(2): 65-75.
7.
Bendat JS and Piersol AG ( 2004) Random Data: Analysis and Measurement Procedures . New York: Wiley.
8.
Berczyński S. and Wróblewski T. ( 2010) Experimental verification of natural vibration models of steel-concrete composite beams. Journal of Vibration and Control [in press].
9.
Brincker R., Zhang L., and Andersen P. ( 2000) Modal identification from ambient responses using frequency domain decomposition, in 18th International Modal Analysis Conference, 7-10 February, San Antonio, TX, Vol. 4062(2), pp. 625-630.
10.
Cantieni R. ( 2001) Assessing a dam’s structural properties using forced vibration testing, in Proceedings of IABSE: International Conference on Safety, Risk and Reliability - Trends in Engineering , 21-23 March, Malta, pp. 1001-1006.
11.
Cantieni R. ( 2004) Experimental methods used in system identification of civil engineering structures, in 2nd Workshop: Problemi di Vibrazioni Nelle Strutture Civili e Nelle Costruzioni Meccaniche , 10-11 June, Perugia, Italy, pp. 10-11.
12.
Chopra AK ( 2009) Earthquake analysis of arch dams, in Sakarya International Symposium of Earthquake Engineering, 1-2 October, Sakarya, Turkey.
13.
Daniell WE and Taylor CA ( 1999) Effective ambient vibration testing for validating numerical models of concrete dams. Earthquake Engineering and Structural Dynamics28(11): 1327-1344.
14.
Darbre GR and Proulx J. ( 2002) Continuous ambient-vibration monitoring of the arch dam of Mauvoisin. Earthquake Engineering and Structural Dynamics31(2): 475-480.
15.
DSI (2009). General Directorate of State Hydraulic. Ankara, Turkey: DSI.
16.
Ewins DJ ( 1984) Modal Testing: Theory and Practice. England: Research Studies Press Ltd.
17.
Fok KL and Chopra AK ( 1986) Earthquake analysis of arch dams including dam-water interaction, reservoir boundary absorption and foundation flexibility. Earthquake Engineering and Structural Dynamics14: 155-184.
18.
Ghanaat Y., Hall RL and Redpath BB ( 2000) Measurement and computation of dynamic response of arch dams including interaction effects. Journal of Seismology and Earthquake Engineering2: 1-19.
19.
Hall JF ( 1998) Efficient nonlinear seismic analysis of arch dams . Earthquake Engineering and Structural Dynamics27: 1425-1444.
20.
Jacobsen NJ, Andersen P., and Brincker R. ( 2006) Using enhanced frequency domain decomposition as a robust technique to harmonic excitation in Operational Modal Analysis, in Proceedings of ISMA2006: International Conference on Noise & Vibration Engineering, 18-20 September, Leuven , Belgium.
21.
Lotfi V. and Espander R. ( 2004) Seismic analysis of concrete arch dams by combined discrete crack and non-orthogonal smeared crack technique. Engineering Structures26: 27-37.
22.
Mendes P. and Oliveira S. ( 2007) Study of dam-reservoir dynamic interaction using vibration tests on a physical model, in 2nd International Operational Modal Analysis Conference, 30 April-2 May, Copenhagen, Denmark, Vol. 2(18), pp. 477-484.
23.
Morassi A. ( 2008) Experimental and analytical study of a steel-concrete bridge. Journal of Vibration and Control14(6): 771-794.
24.
Nasserzare J., Lei Y. and Eskandari-Shiri S. ( 2000) Computation of natural frequencies and mode shapes of arch dams as an inverse problem. Advances in Engineering Software31(11): 827-836.
Priscu R., Popovici A., Stematiu D. and Stere C. ( 1985) Earthquake Engineering for Large Dams. New York: Wiley.
27.
Pulse (2006) Analyzers and Solutions, Release 11.2. Bruel and Kjaer, Sound and Vibration Measurement A/S, Denmark.
28.
Ren WX, Zhao T. and Harik IE ( 2004) Experimental and analytical modal analysis of steel arch bridge. Journal of Structural Engineering130: 1022-1031.
29.
Roeck GD, Peeters B. and Ren WX ( 2000) Benchmark study on system identification through ambient vibration measurements, in Proceedings of the 18th International Modal Analysis Conference, 7-10 February, San Antonio, TX, pp.1106-1112.
30.
Sahoo S. and Chakravorty D. ( 2005) Finite element vibration characteristics of composite hypar shallow shells with various edge supports. Journal of Vibration and Control11: 1291-1309.
31.
Samartín A. and Mosquera JC ( 1994) Determination of symmetric arch dam vibration periods using empirical formula. Engineering Structures16: 585-590.
32.
Sevim B., Bayraktar A., Altunışık AC, Adanur S. and Akköse M. (2010) Modal parameter identification of a prototype arch dam using enhanced frequency domain decomposition and stochastic subspace identification techniques . Journal of Testing and Evaluation38(5) [in press].
33.
Tosun H. and Tosun K. ( 2009) Total risk of large concrete dams in Turkey. Waterpower16: 1-9 [Copyright PennWell Corporation].
34.
Tosun H., Zorluer, İ, Orhan , A.,Seyrek E., Savaş H. and Türköz M. ( 2007) Seismic hazard and total risk analyses for large dams in Euphrates basin. Turkey, Engineering Geology89(7): 155-170.
35.
Usace (1994). Arch Dam Design . Washington, DC, USA: Engineering and Design.
36.
Usace (2003). Time-History Dynamic Analysis of Concrete Hydraulic Structures. Washington, DC, USA: Engineering and Design.
37.
Wang BS and He ZC ( 2007) Crack detection of arch dam using statistical neural network based on the reductions of natural frequencies. Journal of Sound and Vibration302: 1037-1047.
38.
Wang H. and Li D. ( 2006) Experimental study of seismic overloading of large arch dam. Earthquake Engineering and Structural Dynamics35: 199-216.
39.
Wang H. and Li D. ( 2007) Experimental study of dynamic damage of an arch dam. Earthquake Engineering and Structural Dynamics36: 347-366.
