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http://dx.doi.org/10.11112/jksmi.2020.24.3.122

Limit State Assessment of SCH80 3-inch Steel Pipe Elbows Using Moment-Deformation Angle Relationship  

Kim, Sung-Wan (부산대학교 지진방재연구센터)
Yun, Da-Woon (부산대학교 지진방재연구센터)
Cheung, Jin-Hwan (부산대학교 건설융합학부)
Kim, Seong-Do (경성대학교 건설환경도시공학부)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.24, no.3, 2020 , pp. 122-129 More about this Journal
Abstract
To conduct probabilistic seismic fragility analysis for nuclear power plants, it is very important to define the failure modes and criteria that can represent actual serious accidents. The seismic design criteria for piping systems, however, cannot fully reflect serious accidents because they are based on plastic collapse and cannot express leakage, which is the actual limit state. Therefore, it is necessary to clearly define the limit state for reliable probabilistic seismic fragility analysis. Therefore, in this study, the limit state of the SCH80 3-inch steel pipe elbow, the vulnerable part of piping systems, was defined as leakage, and the in-plane cyclic loading test was conducted. Moreover, an attempt was made to quantify the failure criteria for the steel pipe elbow using the damage index, which was based on the dissipated energy that used the moment-deformation angle relationship.
Keywords
Damage index; Dissipated energy; Moment-deformation angle; Steel pipe elbow;
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Times Cited By KSCI : 10  (Citation Analysis)
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