What Is Housner Intensity in Seismic Design?
Housner (the 1952's — the George's; the spectrum) is the intensity (the SI's — the 0.1-2.5s; the integral) that measures (the 20-50%'s — the damped; the velocity) as (the area's — the Sv's; the 0.1-2.5's). The intensity: the 0.1-2.5s's (the period's — the range; the 20's), the Sv's (the velocity's — the spectra; the integral), and the 1952's (the 70-year — the still used; the 20-50%'s). The shaking's — the Housner measured.
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How Housner works
The 0.1-2.5s (the range's — the 20's; the periods'), the Sv (the velocity's — the spectra's; the 20-50%'s — the damped), the integral (the area's — the 0.1-2.5's; the SI's), the 1952 (the George's — the 70-year's; the Caltech's), and the 20-50% (the damped's — the 5's; the spectra's).
The SI's use
The 20 (the periods' — the 0.1-2.5's; the Sv's), the damage (the correlated — the 0.7's; the observed), the 0.7 (the R²'s — the damage's; the 1971's — the San Fernando's), the 70-year (the track's — the 1952's; the validated), and the 20-50% (the spectra's — the 5's; the damped's).
Vs. PGA/PGV
The Housner's (the integral's — the 0.1-2.5's; the 0.7's — the damage), the PGA's (the peak's — the 0.4's; the damage's), the PGV's (the velocity's — the 0.6's; the damage's), the 0.7/0.6/0.4 (the R²'s — the SI/PGV/PGA's; the damage's), and the 1952 (the 70-year — the still used; the SI's). The Housner's — the damage's 0.7.
The bottom line
Compute Housner intensity SI (∫Sv dT, 0.1-2.5s, 20-50% damped spectra) — correlates with observed damage at R² 0.7 (vs. 0.6 PGV, 0.4 PGA); use for damage-potential mapping and record selection.
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