J101013 エルボの耐震設計裕度に関する考察([J10101]原子力施設の耐震安全性に関する実験的・解析的検討(1))

概要

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Elbow is an essential element for three dimensionally arranged piping and it is actually used in most kinds of plants. Our research group started a research on ultimate strength of piping systems containing elbows in 1997 and we have performed several kinds of elbow element tests and shaking table tests. All experimental results have shown that the failure loads are far higher than those described by the design criteria. The authors have confirmed that the seismic design margin is extremely conservative. In this paper, the results of shaking table tests of piping and the stress calculation for those experiments based on design code are described, their results are compared with the seismic design criteria, and the margin is discussed. The authors point out the necessity of a new design code on the basis of the detail analysis and strain criteria in order to describe more appropriate and reasonable seismic design margin of the piping.
一般社団法人日本機械学会の論文
2011-09-11