Transactions of the Korean Society of Pressure Vessels and Piping (한국압력기기공학회 논문집)

Korean Society of Pressure Vessels and Piping (한국압력기기공학회)
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Investigation on the Determination Method of Rayleigh Damping Coefficients for Dynamic Time History Elastic-Plastic Seismic Analysis

동적 시간이력 탄소성 지진 해석을 위한 레일레이 감쇠계수 결정방법 고찰

  • Received : 2017.10.27
  • Accepted : 2017.12.14
  • Published : 2017.12.30
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Abstract

This paper investigates how to determine the Rayleigh damping coefficients for dynamic time history seismic analysis of piping systems. Three methods are applied. The first one is a conventional method to use the natural frequencies of the mode 1 and 2, derived from dynamic analysis. The second method is to determine the Rayleigh damping coefficients based on frequency range of the acceleration histories. The last one is a iterative transient response analysis method using the transient analysis results without and with damping. It is found that the conventional method and the iterative transient response method yield the same results whereas the acceleration frequency-basis method provides more conservative result than the other methods. In addition, it is concluded that the iterative transient response method is recommended.

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References

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