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TECHNICAL PAPERS

Insights Gleaned From NRC-BNL Benchmark Evaluation of Seismic Analysis Methods for Non-Classically Damped Coupled Systems

[+] Author and Article Information
J. Xu, G. DeGrassi

Brookhaven National Laboratory, Upton, New York 11973-5000, USA

N. Chokshi

The United States Nuclear Regulatory Commission, Washington, D.C. 20555-0001, USA

J. Pressure Vessel Technol 126(1), 75-84 (Feb 26, 2004) (10 pages) doi:10.1115/1.1638388 History: Received December 16, 2002; Revised June 04, 2003; Online February 26, 2004
Copyright © 2004 by ASME
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References

Johnson, T. E., and McCaffery, R. J., 1969, “Current Techniques for Analyzing Structures and Equipment for Seismic Effects,” ASCE National Meeting on Water Resource, ASCE, Reston, VA.
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Tsai,  N. C., 1979, “Modal Damping for Soil-Structure Interaction,” J. Eng. Mech. Div., EM2, pp. 323–341.
Igusa,  T., and Der Kiureghian,  A., 1985, “Dynamic Response of Multiply Supported Secondary Systems,” J. Eng. Mech., III(1), pp. 20–41.
Gupta, A., and Gupta, A. K., 1994, “Reduction in Seismic Response of Piping Systems Due to Coupling,” Proceedings of 5th Symposium on Current Issues Related to Nuclear Power Plant Structures, Equipment and Piping, Florida.
Foss,  K. A., 1960, “Coordinate Which Uncouple the Equations of Damped Linear Dynamic Systems,” Trans. ASME, 82, pp. 361–364.
Veletsos,  A. S., and Ventura,  C. E., 1986, “Modal Analysis of Non-Classically Damped Linear Systems,” Earthquake Eng. Struct. Dyn., 14(2), pp. 217–243.
Xu, J., 2003, “A Synthesis Formulation of Explicit Damping Matrix for Non-Classically Damped Systems,” Nucl. Eng. Des., in press.
Xu, J., and DeGrassi, G., 2000, “Benchmark Program for the Evaluation of the Methods to Analyze Non-Classically Damped Coupled Systems,” Final Report, NUREG/CR-6661, The US NRC, Washington DC.
Chen, C., 1974, “Seismic Resistant Design of Safety Class Structures and Equipment,” ASCE Specialty Conference on Structural Design of Nuclear Power Plant Facilities, Chicago.
ASCE Standard 4, 1998, “Seismic Analysis of Safety-Related Nuclear Structures,” ASCE, Reston, VA.
Gupta,  A. K., and Jaw,  J. W., 1986, “Response Spectrum Method for Nonclassically Damped System,” Nucl. Eng. Des., 91, pp. 161–169.
Gupta, A. K., 1992, Response Spectrum Method in Seismic Analysis and Design of Structures, CRC Press, Inc., FL.
Xu, J., 1998, “Overview on Methods for Formulating Explicit Damping Matrices for Non-Classically Damped Structures,” ASME-PVP Conference Seismic Division, San Diego.
Igusa,  T., Sinha,  R., Kokubo,  E., Furukawa,  S.-I., and Kawahata,  J.-I., 1993, “Analysis of Piping With Hysteretic Supports Using Response Spectra,” Nucl. Eng. Des., 143, pp. 187–199.
El Centro, Earthquake, S00E, 1940.

Figures

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BNL benchmark model no. 1
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BNL benchmark model no. 2
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BNL benchmark model no. 3
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BNL benchmark model no. 4a and 4b
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Comparison of maximum displacements for benchmark problem no. 1, Baseline Case Modal superposition time history analyses
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Comparison of maximum element shear forces for benchmark problem no. 1, Baseline Case Modal superposition time history analyses
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Comparison of maximum displacements Uy for benchmark problem no. 4a 16—modal superposition time history analyses
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Comparison of maximum SRSS element moments of S-component for benchmark problem no. 4a 16—modal superposition time history analyses
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Comparison of maximum displacements Ux for benchmark problem no. 4b 16—modal superposition time history analyses
Grahic Jump Location
Comparison of maximum SRSS element moments of S-component for benchmark problem no. 4b 16—modal superposition time history analyses
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Comparison of actual maximum displacements Uy for benchmark problem no. 4a 16—modal superposition time history analyses
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Comparison of mean responses of maximum displacements for benchmark problem no. 1 for seven earthquakes—response spectrum methods
Grahic Jump Location
Comparison of mean responses of maximum element shear forces for benchmark problem no. 1 for seven earthquakes—response spectrum methods
Grahic Jump Location
Comparison of mean responses of maximum displacements Uy for benchmark problem no. 4a for seven earthquakes—response spectrum methods
Grahic Jump Location
Comparison of mean responses of maximum displacements Ux for benchmark problem no. 4b for seven earthquakes—response spectrum methods
Grahic Jump Location
Comparison of mean responses of maximum SRSS element moments of S-component for benchmark problem no. 4a for seven earthquakes—response spectrum methods
Grahic Jump Location
Comparison of mean responses of maximum SRSS element moments of S-component for benchmark problem no. 4b for seven earthquakes—response spectrum methods

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