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Fatigue Damage Estimation in a Three-Dimensional Piping System Under Seismic Loadings

[+] Author Affiliations
Tadahiro Shibutani

Yokohama National University, Yokohama, Kanagawa, Japan

Izumi Nakamura

National Research Institute for Earth Science and Disaster Prevention, Tsukuba, Ibaraki, Japan

Akihito Otani

IHI Corporation, Yokosuka, Kanagawa, Japan

Paper No. PVP2014-29059, pp. V008T08A041; 8 pages
doi:10.1115/PVP2014-29059
From:
  • ASME 2014 Pressure Vessels and Piping Conference
  • Volume 8: Seismic Engineering
  • Anaheim, California, USA, July 20–24, 2014
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4607-0
  • Copyright © 2014 by ASME

abstract

This study introduces an approach by which to estimate fatigue damage in a three-dimensional piping system under seismic loadings. A hybrid piping system simulator consisting of detailed elbow/tee models and piping line elements was constructed in order to estimate fatigue damage in the piping system. A dynamic non-linear finite element analysis with modified seismic wave inputs was carried out in order to calculate the entire strain profile of the piping system. Fatigue damage due to seismic loading was calculated by Miner’s rule since seismic wave contains several amplitudes of total strain ranges. Several tests reported in previous papers were used in order to verify the validity of the proposed approach for fatigue damage estimation.

Copyright © 2014 by ASME

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