抄録
A new analytical technique is developed to be available for the assesment of stationary or non-stationary r.m.s. response of a single-degree-of-freedom structural system with bi-linear hysteretic characteristics subjected to quasistationary non-white noise excitations by extending and making use of the previous analytical procedure described in Part 1 and 2. First elast-plastic stationary r.m.s. response characteristics are studyed and graphycally displayed in the form of reasonance curves when quasi-stationary excitations have time invariant spectral density parameteres and next some quantitative discussions on non-stationary response characteristics, especially maximum r.m.s. displacement responses, are presented by taking into consideration of the evolutionary power spectral density of typical earthquake excitation patterns in relation to the interesting conjecture that elongation of the predominant period noticed in the latter part of the principal shock of actual earthquake excitation wave functions should have considerable influences on non-stationary elasto-plastic maximum responses of the structural system.
