TY - JOUR
T1 - Site amplification functions for central and eastern North America – Part II
T2 - Modular simulation-based models
AU - Harmon, Joseph
AU - Hashash, Youssef M.A.
AU - Stewart, Jonathan P.
AU - Rathje, Ellen M.
AU - Campbell, Kenneth W.
AU - Silva, Walter J.
AU - Ilhan, Okan
N1 - Funding Information:
This study was partially supported by PEER as part of NGA-East, a project funded by the U.S. Nuclear Regulatory Commission, the U.S. Department of Energy, and the Electric Power Research Institute with the participation of the USGS, and also supported by the USGS under Grant Numbers G14AP00102, G14AP00103, and G14AP00104. The authors would like to thank Michael Musgrove, Hua Shao, Sissy Nikolaou, Cheryl Moss, Albert Kottke, and Byungmin Kim for their contribution to this work. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect those of the organizations listed.
Publisher Copyright:
© 2019, Earthquake Engineering Research Institute.
PY - 2019/5
Y1 - 2019/5
N2 - Site amplification models for Central and Eastern North America are developed from simulation results presented in a companion paper. Linear and nonlinear amplification functions are developed for response spectral (RS) accelerations and smoothed Fourier amplitude spectra (FAS). Linear RS model components include ground motion scaling with 30 m time-averaged shear wave velocity (V S30 scaling) and the effects of site period and sediment depth. These models are modular and can be used with or without period or depth terms. Including these terms, especially site period, is desirable and improves model estimation. Modularity also allows linear and nonlinear amplification terms to be developed and combined with linear amplification models without bias. Nonlinear RS models reduce linear amplification as V S30 decreases and the intensity of rock outcrop motions increases. Linear FAS models are tabulated amplification values as functions of V S30 and depth; nonlinear FAS models are analogous to those for the RS. A linear model for correcting a V S30 ¼ 760 m∕s rock condition to V S ¼ 3,000 m∕s is produced.
AB - Site amplification models for Central and Eastern North America are developed from simulation results presented in a companion paper. Linear and nonlinear amplification functions are developed for response spectral (RS) accelerations and smoothed Fourier amplitude spectra (FAS). Linear RS model components include ground motion scaling with 30 m time-averaged shear wave velocity (V S30 scaling) and the effects of site period and sediment depth. These models are modular and can be used with or without period or depth terms. Including these terms, especially site period, is desirable and improves model estimation. Modularity also allows linear and nonlinear amplification terms to be developed and combined with linear amplification models without bias. Nonlinear RS models reduce linear amplification as V S30 decreases and the intensity of rock outcrop motions increases. Linear FAS models are tabulated amplification values as functions of V S30 and depth; nonlinear FAS models are analogous to those for the RS. A linear model for correcting a V S30 ¼ 760 m∕s rock condition to V S ¼ 3,000 m∕s is produced.
UR - http://www.scopus.com/inward/record.url?scp=85065838850&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85065838850&partnerID=8YFLogxK
U2 - 10.1193/091117EQS179M
DO - 10.1193/091117EQS179M
M3 - Article
AN - SCOPUS:85065838850
VL - 35
SP - 815
EP - 847
JO - Earthquake Spectra
JF - Earthquake Spectra
SN - 8755-2930
IS - 2
ER -