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Download Ground Motions for Design - USGS Powerpoint presentation (FREE!)
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Outline of Material:
ƒ Derivation of "International" Building Code (IBC) Design Maps from USGS Hazard Maps
ƒ Use of IBC Design Maps (i.e., procedure)
ƒ Computer software for IBC Design Maps
ƒ Potential updates of IBC Design Maps
 

Derivation of IBC Design Maps
ƒ The ground motions for design that are mapped in the IBC are based on, but not identical to, the USGS Probabilistic Seismic Hazard Analysis (PSHA) Maps for …
ƒ 2% in 50 years probability of exceedance
ƒ 0.2- and 1.0-second spectral acceleration (SA)
ƒ (Vs30=760m/s, i.e., boundary of Site Classes B/C)
 

Derivation of IBC Design Maps
ƒ The ground motions for design that are mapped in the IBC are based on, but not identical to, the USGS Probabilistic Seismic Hazard Analysis (PSHA) Maps for …
ƒ 2% in 50 years probability of exceedance
ƒ 0.2- and 1.0-second spectral acceleration (SA)
ƒ The site-specific ground motion procedure in the building code explains the link between the two.
 

USGS, Ground motions, design



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