手法を比較

	応答スペクトル解析	非線形時刻歴解析
分野	土木工学	土木工学
系統	Process / pipeline	Process / pipeline
提唱年	1941	1959
提唱者	George W. Housner	Nathan M. Newmark
種類	Linear modal analysis for earthquake response	Time-stepping numerical method for earthquake engineering
原典	Housner, G. W. (1941). Calculating the response of an oscillator to arbitrary ground motion. Bulletin of the Seismological Society of America, 32(2), 143-149.	Newmark, N. M. (1959). A method of computation for structural dynamics. Journal of the Engineering Mechanics Division, 85(3), 67-94.
別名	Elastic response spectrum, Design spectrum method, Modal response spectrum	Nonlinear dynamic analysis, Step-by-step integration, Time domain analysis
関連	4	4
概要	Response spectrum analysis is a linear modal method for estimating earthquake-induced forces and displacements in structures. Introduced by Housner in 1941, this approach uses design spectra that represent the maximum response of single-degree-of-freedom oscillators at different natural frequencies to compute the structural response by combining modal contributions.	Nonlinear time-history analysis is a numerical method that solves the equations of motion step-by-step in the time domain, using recorded or synthetic earthquake ground motions as input. Developed by Newmark in 1959, this approach captures the full dynamic response of structures including material nonlinearity, geometric effects, and energy dissipation mechanisms.