Abstract
Mechanical snubbers have often been used as supports for the piping in nuclear power plants, but recently the elastoplastic-type piping support devices (named energy absorbers), which are low cost and maintenance free, have been planned for use instead of snubbers. Under circumstances, to establish the concept of the piping design using the elastoplastic-type piping support devices, a vibration test of the piping system supported by elastoplastic devices was performed. Based on the test results, we performed the simulation analysis by the various analysis methods. By the results of these inuestigations, we confirmed the following : (1) by determining that the energy absorber showed a plastic behavior at Sl exiting level or more, we confirmed the response spectrum method was available as the seismic design method : (2) the reaction force characteristic was confirmed to be approximated by the bilinear model.
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