Updates to building-code maps for the 2015 NEHRP recommended seismic provisions

Earthquake Spectra
By: , and 



With the 2014 update of the U.S. Geological Survey (USGS) National Seismic Hazard Model (NSHM) as a basis, the Building Seismic Safety Council (BSSC) has updated the earthquake ground motion maps in the National Earthquake Hazards Reduction Program (NEHRP) Recommended Seismic Provisions for New Buildings and Other Structures, with partial funding from the Federal Emergency Management Agency. Anticipated adoption of the updated maps into the American Society of Civil Engineers Minimum Design Loads for Building and Other Structures and the International Building and Residential Codes is underway. Relative to the ground motions in the prior edition of each of these documents, most of the updated values are within a ±20% change. The larger changes are, in most cases, due to the USGS NSHM updates, reasons for which are given in companion publications. In some cases, the larger changes are partly due to a BSSC update of the slope of the fragility curve that is used to calculate the risk-targeted ground motions, and/or the introduction by BSSC of a quantitative definition of “active faults” used to calculate deterministic ground motions.

Publication type Article
Publication Subtype Journal Article
Title Updates to building-code maps for the 2015 NEHRP recommended seismic provisions
Series title Earthquake Spectra
DOI 10.1193/042015EQS058M
Volume 31
Issue S1
Year Published 2015
Language English
Publisher EERI
Contributing office(s) Geologic Hazards Science Center
Description 27 p.
First page S245
Last page S271
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