@ ŒfÚŽGŽi˜ajF “ú–{’nkHŠwƒVƒ“ƒ|ƒWƒEƒ€u‰‰W VolF 5Šª ”NF 1978”N •ÅF 1169-1176•Å ’˜ŽÒi˜ajF - ƒ^ƒCƒgƒ‹i˜ajF - ´˜^i˜ajF
- ƒL[ƒ[ƒhi˜ajF - ŒfÚŽGŽi‰pjF PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM ’˜ŽÒi‰pjF Takahide WATANABE, Masanori IZUMI ƒ^ƒCƒgƒ‹i‰pjF STOCHASTIC RESPONSE ANALYSIS OF NONLINEAR STRUCTURES WITH EQUIVALENT LINEAR METHOD ´˜^i‰pjF
In the evaluation of structural safety under the earthquakes the stochastic responses of structure in the nonlinear range are required, but analytical study of this problem is generally difficult. So the approximate methods are useful to obtain the solution, and equivalent linear method is one of useful technique. The purpose of this paper is to present a easy application of the equivalent linear method. The nonlinear system is replaced by a equivalent linear system with ductility-dependent stiffness and damping. The response statistics of the equivalent linear system are based on random vibration theory and Poisson approximation which are used to obtain the linear responses under stationary excitation. The statistics of the maximum response are obtained by iteration. Numerical examples are given for single-degree-of-freedom systems. The results are compared with empirical and simulated results, and the comparison are generally satisfactory. ƒL[ƒ[ƒhi‰pjF - ‹LŽ–‹æ•ªF - ‹æ•ª @@@ˆÏˆõ‰ï˜_•¶W