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概要

This report describes an elasto-plastic analysis method which can be applied for the actual aseismic design of nuclear carbon steel piping systems. This analysis method follows the one developed by the related JSME tasks. Using this analysis method, the test result has been reproduced to the safe side for the strain range used as the intensity evaluation index of carbon steel piping. Furthermore, fatigue life has also been reproduced to the safe side by using the curve of fatigue of carbon steel piping upon which it decided in a cooperative study among electric power companies and manufacturers in Japan. It seems that this analysis technology is applicable also to seismic integrity assessment for the preservation after an earthquake since this elasto-plastic analysis method can grasp the elasto-plastic behavior of carbon steel piping analytically. In addition, this paper improves the content announced at the 15th academic lecture meetings [1].

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