[MIDAS로 배우는 구조역학] 15장 응답스펙트럼 해석 Response Spectrum
• YouTube: 
https://www.youtube.com/watch?v=9y89-zpFlIM&list=PLXMmPDu5-PnfaY2KqGNHYeIbZ4AMntpO1&index=15
• PDF: 
https://www.dropbox.com/s/ukp0avue15mfmwe/04_15%20Response%20Spectrum.pdf?dl=0