عنوان

Site effects in parametric ground motion models for the GEM-PEER Global GMPEs Project

Number

LA1963r6jf

Title Proper

Site effects in parametric ground motion models for the GEM-PEER Global GMPEs Project

General Material Designation

[Article]

First Statement of Responsibility

Stewart, Jonathan P; Seyhan, Emel; Boore, David M; Campbell, Kenneth W; Erdik, Mustafa; Silva, Walter J; Di Alessandro, Carola; Bozorgnia, Yousef

Text of Note

We review site parameters used in ground motion prediction equations (GMPEs) for various tectonic regimes and describe procedures for estimation of site parameters in the absence of site-specific data. Most modern GMPEs take as the principal site parameter the average shear wave velocity in the upper 30 m of the site (V_s30) either directly or as the basis for site classification into categories. Three GMPEs developed for active regions also use basin depth parameters. We review estimation procedures for V_s30 that utilize surface geology, terrain-based site categories, ground slope, or combinations of these. We analyze the relative efficacy of those procedures using a profile data set from California assembled in a recent NGA project. The results indicate that no single procedure is most effective and that prediction dispersion is lower for young sediments than for stiff soils or rock.

Date of Publication

2012

Title

UCLA

Electronic name

[Article]

275578

a

Y