サポートの非線形特性による影響を考慮した配管系の簡易耐震設計法に関する研究 : がた・摩擦による応答低減効果の評価

抄録

This study deals with the simplified numerical analysis method taking account of nonlinear response, particularly, gap and friction effects in piping-support systems in industrial plants such as petrochemical plants. Using simplified two-degree-of-freedom systems, one having only friction effect and the other having both gap and friction effects, the characteristics of response reduction due to these nonlinearities can be evaluated in terms of "response reduction factor". From the study, it can be shown that the nonlinearities caused by gap and friction have a dominant reduction effect particularly on the maximum displacement response. Finally, a convenient diagram of the response reduction factor is proposed for practical seismic design of a piping-support system.