Location
San Diego, California
Presentation Date
30 Mar 2001, 1:30 pm - 3:30 pm
Abstract
Free-field ground motion during earthquake can be conveniently represented by response spectrum for a given level of damping and ductility. Typical response spectra have been established in several seismic codes, as the Eurocode EC8, but for real seismic events some disagreements may be still encountered. The disagreements come from the presence of soil formations or local site conditions which can differ G-om those provided by seismic codes. During the recent Umbro-Marchigiano earthquake, happened in Italy in the September-October 1997, 198 records ofhorizontal acceleration have been collected from more than 30 accelerometric stations. Soil conditions have been known in detail for 90 records so allowing their classification into four categories: hard rock (28 records), weak rock (28 records), stiff soil (20 records) and soft soils (14 records). Depending on soil conditions, elastic and inelastic response spectra of acceleration, velocity and displacement have been evaluated for discrete values of damping ratio and ductility factor. Comparisons have shown that for soft soil the Umbro-Marchigiano earthquake gives an elastic acceleration spectrum and a displacement spectrum which are less conservative than those provided by EC8.
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
Carrubba, Paolo and Maugeri, Michele, "Site Dependent Spectra for the Umbro-Marchigiano Earthquake (Italy) of September-October 1997" (2001). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 3.
https://scholarsmine.mst.edu/icrageesd/04icrageesd/session03/3
Included in
Site Dependent Spectra for the Umbro-Marchigiano Earthquake (Italy) of September-October 1997
San Diego, California
Free-field ground motion during earthquake can be conveniently represented by response spectrum for a given level of damping and ductility. Typical response spectra have been established in several seismic codes, as the Eurocode EC8, but for real seismic events some disagreements may be still encountered. The disagreements come from the presence of soil formations or local site conditions which can differ G-om those provided by seismic codes. During the recent Umbro-Marchigiano earthquake, happened in Italy in the September-October 1997, 198 records ofhorizontal acceleration have been collected from more than 30 accelerometric stations. Soil conditions have been known in detail for 90 records so allowing their classification into four categories: hard rock (28 records), weak rock (28 records), stiff soil (20 records) and soft soils (14 records). Depending on soil conditions, elastic and inelastic response spectra of acceleration, velocity and displacement have been evaluated for discrete values of damping ratio and ductility factor. Comparisons have shown that for soft soil the Umbro-Marchigiano earthquake gives an elastic acceleration spectrum and a displacement spectrum which are less conservative than those provided by EC8.
