Location
San Diego, California
Presentation Date
29 Mar 2001, 7:30 pm - 9:30 pm
Abstract
Amplification studies for New York City (NYC) soil sites are summarized herein. Ten (10) typical soil profiles from Brooklyn, Queens, and Manhattan, are analyzed using one-dimensional SHAKE methods. Dynamic soil properties are derived using state-of-practice correlations with standard penetration resistance and compared to available in-situ geophysical measurements. Three different rock motions are utilized, each modified from real records to match 500- and 2500-year probabilistic spectra. Results are presented in terms of dimensionless ratios of response spectra (RRS) and surface response spectra. The effect of the impedance contrast between soil and rock on soil amplification is examined. It is shown that although seismic hazard in the area is only moderate, significant soil effects can be generated and lead to large soil amplifications. By comparing the derived spectra with the design spectra defined by the 1998 NYC Department of Transportation guidelines, it is shown that the latter may be unconservative at short periods. Comparison of the results with the design spectra of the 1995 NYC Seismic Code shows that the Code provides conservative design parameters, but unconservative amplification values.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
4th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2001 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Nikolaou, Sissy and Edinger, Peter, "Seismic Amplification of Typical New York City Soil Profiles" (2001). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 21.
https://scholarsmine.mst.edu/icrageesd/04icrageesd/session04/21
Included in
Seismic Amplification of Typical New York City Soil Profiles
San Diego, California
Amplification studies for New York City (NYC) soil sites are summarized herein. Ten (10) typical soil profiles from Brooklyn, Queens, and Manhattan, are analyzed using one-dimensional SHAKE methods. Dynamic soil properties are derived using state-of-practice correlations with standard penetration resistance and compared to available in-situ geophysical measurements. Three different rock motions are utilized, each modified from real records to match 500- and 2500-year probabilistic spectra. Results are presented in terms of dimensionless ratios of response spectra (RRS) and surface response spectra. The effect of the impedance contrast between soil and rock on soil amplification is examined. It is shown that although seismic hazard in the area is only moderate, significant soil effects can be generated and lead to large soil amplifications. By comparing the derived spectra with the design spectra defined by the 1998 NYC Department of Transportation guidelines, it is shown that the latter may be unconservative at short periods. Comparison of the results with the design spectra of the 1995 NYC Seismic Code shows that the Code provides conservative design parameters, but unconservative amplification values.
