Response Spectrum Wizard : Damping

Scale response spectrum

When a constant or modal damping option has been selected the used is given the option of scaling the spectrum to allow for different levels of damping.

• Code defined scaling only – the spectrum is modified if the code allows for this, otherwise it is left unchanged.
• Scale by [ISO19901-2] – this applies a scaling of as outlined in ISO 19901-2 over the whole spectrum
• Newmark-Hall : 50th percentile – the median acceleration modifiers from Newmark and Hall (1982) are applied to the calculated spectral values
• Newmark-Hall : 84th percentile – the acceleration modifiers at one standard deviation from Newmark and Hall (1982) are applied to the calculated spectral values