Shaking table tests of three-dimensional piping models with degradation were conducted in order to investigate the influence of degradation on dynamic behavior and failure modes of piping systems. The degradation condition induced in the piping models was about 50 percent full circumferential wall thinning at elbows. Four types of models were made for the shaking table tests by varying the location of wall thinning in the piping models. These models were excited under the same input acceleration until the models failed and a leak of pressurized internal water occurred. Through these tests, the change of the vibration characteristics and processes to failure of degraded piping models were obtained. The deformation of the piping models tended to concentrate on the degraded elbows, and the damage was concentrated on the weakest elbow in the piping models. The failure mode of the piping models was a low-cycle fatigue failure at the weakest elbow.
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e-mail: izumi@bosai.go.jp
e-mail: akihito_ootani@ihi.co.jp
e-mail: masaki@swan.me.ynu.ac.jp
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February 2004
Technical Papers
Failure Behavior of Piping Systems With Wall Thinning Under Seismic Loading
Izumi Nakamura,
e-mail: izumi@bosai.go.jp
Izumi Nakamura
Disaster Prevention Research Group, National Research Institute for Earth Science and Disaster Prevention, 3-1 Tennodai, Tsukuba-shi, Ibaraki, 305-0006 Japan
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Akihito Otani,
e-mail: akihito_ootani@ihi.co.jp
Akihito Otani
(see below)
Ishikawajima-Harima Heavy Industries Co., Ltd., 1, Shin-Nakahara-cho, Isogo-ku, Yokohama, 235-8501 Japan
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Masaki Shiratori
e-mail: masaki@swan.me.ynu.ac.jp
Masaki Shiratori
Department of Mechanical Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, 240-8501 Japan
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Izumi Nakamura
Disaster Prevention Research Group, National Research Institute for Earth Science and Disaster Prevention, 3-1 Tennodai, Tsukuba-shi, Ibaraki, 305-0006 Japan
e-mail: izumi@bosai.go.jp
Akihito Otani
(see below)
Ishikawajima-Harima Heavy Industries Co., Ltd., 1, Shin-Nakahara-cho, Isogo-ku, Yokohama, 235-8501 Japan
e-mail: akihito_ootani@ihi.co.jp
Masaki Shiratori
Department of Mechanical Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama, 240-8501 Japan
e-mail: masaki@swan.me.ynu.ac.jp
Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division April 30, 2003; revision received August 12, 2003. Associate Editor: G. C. Slagis.
J. Pressure Vessel Technol. Feb 2004, 126(1): 85-90 (6 pages)
Published Online: February 26, 2004
Article history
Received:
April 30, 2003
Revised:
August 12, 2003
Online:
February 26, 2004
Citation
Nakamura, I., Otani, A., and Shiratori, M. (February 26, 2004). "Failure Behavior of Piping Systems With Wall Thinning Under Seismic Loading ." ASME. J. Pressure Vessel Technol. February 2004; 126(1): 85–90. https://doi.org/10.1115/1.1638787
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