Duhamel Plus ver. 1.0

This program uses the Duhamel integration for calculation of the linear response of single-degree-of-freedom structures to arbitrary or harmonic dynamic loading. This program is capable of calculation of the response spectra of earthquake records for different damping ratios. It can normalize the earthquake records and calculate the average spectra of multiple records as well. This program is useful for structural designers who are to scale their earthquake records for a dynamic analysis, or want to calculate a site-specific design spectrum from local records.