抄録
For introducing the elastic-plastic analytical procedure to the seismic safety evaluation of piping systems in nuclear power plants, benchmark analyses based on the existing experimental results have been conducted. The purpose of the benchmark analyses is to clarify the variation of the elastic-plastic analyses results and the factors to cause such analytical variation depending on the analysts. From the benchmark analyses on the in-plane bending test of a carbon steel elbow, the variation of the modeling procedure, the load-deflection curves, strain behavior are obtained. The results of the benchmark analyses show that the yield stress set in the analyses is one important factor to estimate the elastic-plastic behavior well. It is also shown that the variation of the residual strain tend to be large especially under high input level, though the strain range can be estimated well.
