Effect of Damage on Natural Vibration Characteristics of Large Semi-cushion Spiral Case Structure

Research Article - Civil Engineering
  • 15 Downloads

Abstract

A spiral case structure presents various natural vibration characteristics with damage in different degrees in peripheral concrete. The natural vibration characteristics and resonance safety of a large semi-cushion spiral case structure with damage in varying degrees in peripheral concrete are compared and analyzed. For this purpose, a finite element analysis method of vibration characteristics, a four-parameter damage constitutive model of concrete, and spiral case structure of the Ahai Hydropower Station are utilized. Results show that each mode of natural frequency of the spiral case structure declines after the damage in concrete. The extent of the reduction in natural frequency is large when the damage is serious. The mode shapes of the spiral structure are all complex and twisted before and after the damage in concrete. Afterward, however, amplitude increases. After considering the damage, a new possible source of resonance cannot be identified. Resonance checking shows that the damage in concrete cannot seriously harm the Ahai spiral case structure. Therefore, this study provides new reference and support for the production design and safe operation of large semi-cushion spiral case structure.

Keywords

Large semi-cushion spiral case structure Natural vibration characteristic Concrete damage Resonance checking Four-parameter damage model Finite element method 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Notes

Acknowledgements

This research work was supported by CRSRI Open Research Program (Grant No. CKWV2016386/KY), National Natural Science Foundation of China (Grant No. 51409227), and Jiangsu Planned Projects for Postdoctoral Research Funds (Grant No. 1501115B).

Compliance with ethical standards

Conflict of interest

The authors declare that there is no conflict of interests regarding the publication of this paper.

References

  1. 1.
    Dai, H.C.; Peng, P.: Selection and verification of the structural pattern of the penstock and spiral case of the TGP power-station. Eng. Sci. 2, 005 (2004)Google Scholar
  2. 2.
    Ditommaso, R.; Vona, M.; Gallipoli, M.R.; et al.: Evaluation and considerations about fundamental periods of damaged reinforced concrete buildings. Nat. Hazards Earth Syst. Sci. 13, 1903–1912 (2013)CrossRefGoogle Scholar
  3. 3.
    Hamad, W.I.; Owen, J.S.; Hussein, M.F.M.: Modelling the degradation of vibration characteristics of reinforced concrete beams due to flexural damage. Struct. Control Health Monit. 22, 939–967 (2015)CrossRefGoogle Scholar
  4. 4.
    Wang, S.S.; Ren, Q.W.: Relationship between local damage and structural dynamic behavior. Sci. China Technol. Sci. 55, 3257–3262 (2012)CrossRefGoogle Scholar
  5. 5.
    Sevim, B.; Altunisik, A.C.; Bayraktar, A.: Experimental evaluation of crack effects on the dynamic characteristics of a prototype arch dam using ambient vibration tests. Comput. Concr. 10, 277–294 (2012)CrossRefGoogle Scholar
  6. 6.
    Altunişik, A.C.; Günaydin, M.; Sevim, B.; et al.: CFRP composite retrofitting effect on the dynamic characteristics of arch dams. Soil Dyn. Earthq. Eng. 74, 1–9 (2015)CrossRefGoogle Scholar
  7. 7.
    Altunışık, A.C.; Günaydın, M.; Sevim, B.; et al.: Retrofitting effect on the dynamic properties of model arch dam with and without reservoir water using ambient vibration test methods. J. Struct. Eng. 142, 04016069 (2016)CrossRefGoogle Scholar
  8. 8.
    Altunışık, A.C.; Günaydın, M.; Sevim, B.; et al.: Dynamic characteristics of an arch dam model before/after strengthening considering reservoir water. J. Perform. Constr. Facil. 30, 06016001 (2016)CrossRefGoogle Scholar
  9. 9.
    Altunışık, A.C.; Okur, F.Y.; Kahya, V.: Modal parameter identification and vibration based damage detection of a multiple cracked cantilever beam. Eng. Fail. Anal. 79, 154–170 (2017)CrossRefGoogle Scholar
  10. 10.
    Altunışık, A.C.: Experimental identification of box girder bridge model under undamaged and damaged conditions considering time effect. Comput. Concr. 18, 827–852 (2016)CrossRefGoogle Scholar
  11. 11.
    Zhang, C.H.; Zhang, Y.L.: Nonlinear dynamic analysis of the Three Gorge Project powerhouse excited by pressure fluctuation. J. Zhejiang Univ. Sci. A 10, 1231–1240 (2009)CrossRefMATHGoogle Scholar
  12. 12.
    Tian, Z.Q.; Zhang, Y.L.; Ma, Z.Y.; et al.: Effect of concrete cracks on dynamic characteristics of powerhouse for giant-scale hydrostation. Trans. Tianjin Univ. 14, 307–312 (2008)CrossRefGoogle Scholar
  13. 13.
    Wei, W.; Li, T.C.: A new four-parameter equivalent strain for isotropic damage model. Eng. Mech. 22, 92–96 (2005)Google Scholar
  14. 14.
    SL 266-2001: 2001. The Ministry of Water Resources of the People’s Republic of China, Design code for hydropower houseGoogle Scholar

Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  1. 1.School of Hydraulic, Energy and Power EngineeringYangzhou UniversityYangzhouChina
  2. 2.Jiangsu Surveying and Design Institute of Water Resources Co., Ltd.YangzhouChina

Personalised recommendations