Housner Intensity

Housner Intensity response spectrum intensity

where PSV is the pseudo-velocity response spectrum (see Response Spectrum), T and ξ are the structural natural period and damping, respectively.

Dimensionally, the Housner Intensity is a displacement (cm).

In the case of records contained in ITACA, the Housner Intensity was calculated considering ξ = 5%.

This parameter of seismic motion severity is related to the potential damage expected from the considered earthquake, since the majority of structures have a fundamental period of vibration in the range between 0.1 and 2.5 s.