抄録
Mechanical snubbers have often been used as supports for the piping in nuclear power plants, but recently, elastoplastic-type piping support devices (called energy absorbers), which are low in cost and maintenance free, have been planned for use instead of snubbers. Under these circumstances, to establish the concept of the piping design using elastoplastic-type piping support devices, a device test and a vibration test of the piping system suppported by elastoplastic devices were performed. Based on the test results, we performed the simulation analysis by various analysis methods. By the results of these investigations, we confirmed the following : ( 1 ) The evaluation formulas for the force-displacement relation and the dissipated energy of devices were established and are considered to be reasonable in comparison with the test results. ( 2 ) By determining that the energy absorber showed plastic behavior at the exciting of S1 level or more, we validated the response spectrum method as a seismic design method.
