Shaking Table Tests of the Cable Tray System in Nuclear Power Plants
Publication: Journal of Performance of Constructed Facilities
Volume 31, Issue 4
Abstract
Two series of shaking table tests were performed to investigate the seismic performance and damping ratio of the cable tray system in nuclear power plants. The required response spectrum of compatible floor-motion time histories was generated as the input motions to the shaking table. The full cable tray (100% loading) behaved elastically in the five operating basis earthquakes, and 1.5 times of safety shutdown earthquake (1.5SSE) excitations, while buckling damage occurred at the bottom of the column in the 2.0SSE. The experimental component acceleration amplification (CAA) factor is larger than that given by current codes. To determine the relationships between the loading ratio and both damping ratio and fundamental frequency, the cable tray was excited through the shaking table with white noise that has peak accelerations ranging from 0.1 to . The results show that the observed damping ratios are smaller than those specified in code provisions. This study shows that shaking table tests should be conducted to define a more-reliable damping value for the cable trays in nuclear power plants. Finally, a preliminary fragility analysis was conducted using the CAA factor as the indicator.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This work was supported by China National Science and Technology Major Project (Grants 2013ZX06005004-002-001 and 2016YFE0105600) and China National Science Foundation (Grants 51078290, 51578411, 51608381, and 51578405). This support is greatly acknowledged.
References
ASCE. (2005). “Seismic design criteria for structures, systems and components in nuclear facilities.” ASCE/SEI 43-05, Reston, VA.
ASCE. (2010). “Minimum design loads for buildings and other structures.” ASCE/SEI 7-10, Reston, VA.
Biasio, M. D., Grange, S., Dufour, F., Allain, F., and Petre-Lazar, I. (2015). “Intensity measures for probabilistic assessment of non-structural components acceleration demand.” Earthquake Eng. Struct. Dyn., 44(13), 2261–2280.
BSI (British Standards Institution). (2013). “Bases for design of structures—Loads, forces and other actions—Seismic actions on nonstructural components for building applications.” BS ISO 13033:2013, London.
CEA (China Earthquake Administration). (2015). “Code for seismic design of nuclear power plants (draft).”, Ministry of Housing and Urban-Rural Development of the People’s Republic of China (MOHURD), Beijing (in Chinese).
CEN (European Committee for Standardization). (2005). “Design of structures for earthquake resistance—Part 1: General rules, seismic actions and rules for buildings.” BS EN 1998-1:2004, Eurocode 8, Brussels, Belgium.
Chopra, A. K. (2012). Dynamics of structures, 4th Ed., Prentice Hall, Englewood Cliffs, NJ.
Choun, Y-S., Choi, I-K., and Seo, J-M. (2008). “Improvement of the seismic safety of existing nuclear power plants by an increase of the component seismic capacity: A case study.” Nucl. Eng. Des., 238(6), 1410–1420.
Desmond, T. P., and Dermitzakis, S. N. (1987). “Effective-length factors for buckling of cable-tray supports.” Nucl. Eng. Des., 103(3), 313–332.
Eder, S. J., and Yanev, P. I. (1988). “Evaluation of cable tray and conduit systems using the seismic experience data base.” Nucl. Eng. Des., 107(1–2), 149–153.
EPRI (Electric Power Research Institute). (2002). “Seismic fragility application guide.”, ABSG Consulting, Irvine, CA.
FEMA. (2001). “Prestandard and commentary for the seismic rehabilitation of buildings: Guidelines.”, Washington, DC.
Firoozabad, E. S., Jeon, B.-G., Choi, H.-S., and Kim, N.-S. (2015). “Seismic fragility analysis of seismically isolated nuclear power plants piping system.” Nucl. Eng. Des., 284(4), 264–279.
Grandis, S. D., Domaneschi, M., and Perotti, F. (2009). “A numerical procedure for computing the fragility of NPP components under random seismic excitation.” Nucl. Eng. Des., 239(11), 2491–2499.
Günay, S., and Mosalam, K. M. (2013). “PEER performance-based earthquake engineering methodology, revisited.” J. Earthquake Eng., 17(6), 829–858.
IEEE. (2006). “IEEE recommended practice for seismic design of substations.” 693, IEEE, New York.
IEEE. (2014). “IEEE recommended practice for seismic qualification of class 1E equipment for nuclear power generating stations.” 344-2013, IEEE, New York.
Kajitani, Y., Chang, S. E., and Tatano, H. (2013). “Economic impacts of the 2011 Tohoku-Oki earthquake and tsunami.” Earthquake Spectra, 29(S1), S457–S478.
Kennedy, R. P. (2011). “Performance-goal based (risk informed) approach for establishing the SSE site specific response spectrum for future nuclear power plants.” Nucl. Eng. Des., 241(3), 648–656.
Kennedy, R. P., Cornell, C. A., Campbell, R. D., Kaplan, S., and Perla, H. F. (1980). “Probabilistic seismic safety study of an existing nuclear power plant.” Nucl. Eng. Des., 59(2), 315–338.
Kennedy, R. P., and Ravindra, M. K. (1984). “Seismic fragilities for nuclear power plant risk studies.” Nucl. Eng. Des., 79(1), 47–68.
Lu, W., Zhao, B., and Zhang, M. (2013). “Shaking table testing of the multi-span cable tray.”, State Key Laboratory of Disaster Reduction in Civil Engineering (SKLDRCE), Shanghai, China (in Chinese).
MATLAB [Computer software]. MathWorks, Natick, MA.
Nakamura, N., Akita, S., Suzuki, T., Koba, M., Nakamura, S., and Nakano, T. (2010). “Study of ultimate seismic response and fragility evaluation of nuclear power building using nonlinear three-dimensional finite element model.” Nucl. Eng. Des., 240(1), 166–180.
Newmark, N. M., and Hall, W. J. (1982). “Earthquake spectra and design.” Earthquake Engineering Research Institute, Berkeley, CA.
Notohardjono, B. D., Wilcoski, J., and Gambill, J. B. (2004). “Design of earthquake resistant server computer structures.” J. Pressure Vessel Technol., 126(1), 66–74.
Orbovic, N., Stojadinovic, B., Marc, B. M., and Tim, W. T. (2004). “Seismic performance-based evaluation of nuclear facility structures.” Proc., 13th World Conf. on Earthquake Engineering, Univ. of British Columbia, Vancouver, BC, Canada.
Pearce, B. K., Jackson, J. E., Dixon, M. W., and Bourne, F. R. (1984). “Reduction of seismic loads in cable tray hangers.” Nucl. Eng. Des., 81(3), 403–410.
Perotti, F., Marco, D., and Silvia, D. G. (2013). “The numerical computation of seismic fragility of base-isolated nuclear power plants buildings.” Nucl. Eng. Des., 262(9), 189–200.
Politopoulos, I., and Moussallam, N. (2012). “Horizontal floor response spectra of base-isolated buildings due to vertical excitation.” Earthquake Eng. Struct. Dyn., 41(3), 587–592.
Porter, K. A. (2003). “An overview of PEER’s performance-based earthquake engineering methodology.” Proc., 9th Int. Conf. on Applications of Statistics and Probability in Civil Engineering (ICASP9), Civil Engineering Risk and Reliability Association (CERRA), San Francisco, 973–980.
Shahin, R. M., Manuelyan, R., and Jan, C. M. (1978). “Seismic analysis of electrical cable trays and support systems.” Nucl. Eng. Des., 45(2), 515–522.
Smith, P. D., Eder, S. J., and Conoscente, J-P. (1990). “SQUG cable tray and conduit evaluation procedure.” Nucl. Eng. Des., 123(2–3), 241–245.
SNZ (Standards New Zealand). (2004). “Structural design actions. Part 5: Earthquake actions.” NZS 1170.5, Wellington, New Zealand.
Tabatabai, S. (2014). “Design response spectra for seismic design of nuclear power plants.”, U.S. Nuclear Regular Commission (NRC) Office of Nuclear Regulatory Research, Washington, DC.
U.S. Nuclear Regulatory Commission. (2007). “Damping values for seismic design of nuclear power plants (Rv.1).”, Washington, DC.
WEC (Westinghouse Electric Company). (2010). “AP1000 design control document.”, Cranberry Township, PA.
WEC (Westinghouse Electric Company). (2011). “AP1000 design control document.”, Cranberry Township, PA.
Zentner, I. (2010). “Numerical computation of fragility curves for NPP equipment.” Nucl. Eng. Des., 240(6), 1614–1621.
Information & Authors
Information
Published In
Copyright
©2017 American Society of Civil Engineers.
History
Received: Apr 23, 2016
Accepted: Nov 8, 2016
Published ahead of print: Feb 14, 2017
Published online: Feb 15, 2017
Discussion open until: Jul 15, 2017
Published in print: Aug 1, 2017
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.