Folder: Gridded earthquake ground motions for the 2015 NEHRP Recommended Seismic Provisions and 2016 ASCE/SEI 7 Standard ( Show all descendants )
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The Maximum Considered Earthquake Geometric Mean (MCEG) peak ground acceleration (PGA) values of the 2015 NEHRP Recommended Seismic Provisions and the 2016 ASCE/SEI 7 Standard are calculated from the data in the downloadable files below, via the following equation: PGA = min[ PGAUH , max( PGAD84th , 0.5 ) ] where PGAUH = uniform-hazard peak ground acceleration; PGAD84th = 84th-percentile peak ground acceleration. These peak ground accelerations are each for the geometric mean of two horizontal components and a site shear wave velocity (VS30) of 760 m/s. For more information, see the "Related External Resources" below. Note: The USGS Seismic Design Web Services first spatially interpolate...
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The Risk-Targeted Maximum Considered Earthquake (MCER) spectral response acceleration (SS and S1) values of the 2015 NEHRP Recommended Seismic Provisions, the 2016 ASCE/SEI 7 Standard, the 2017 ASCE/SEI 41 Standard, and the 2018 and 2021 editions of the International Building Code are calculated from the data in the downloadable files below, via the following equations: SS = min[ SSUH * CRS , max( SSD84th , 1.5 ) ]; S1 = min[ S1UH * CR1 , max( S1D84th , 0.6 ) ]; where SSUH & S1UH = uniform-hazard spectral accelerations at periods of 0.2 & 1.0 seconds, respectively; CRS & CR1 = risk coefficients at spectral periods of 0.2 & 1.0 seconds, respectively; SSD84th & S1D84th...
Categories: Data
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