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Soil-structure interaction effects on a regional scale through ground-motion simulations and reduced order models; a case study from the 2008 M (sub w) 5.4 Chino Hills mainshock

Danilo S. Kusanovic, Ricardo Taborda and Domniki Asimaki
Soil-structure interaction effects on a regional scale through ground-motion simulations and reduced order models; a case study from the 2008 M (sub w) 5.4 Chino Hills mainshock
Bulletin of the Seismological Society of America (July 2023) 113 (6): 2557-2573

Abstract

We demonstrate the effects of soil-structure interaction (SSI) for three idealized building typologies on a regional scale, using a simulated earthquake scenario of the 2008 M (sub w) 5.4 Chino Hills mainshock in southern California as an example. All the three buildings lie on shallow foundations, and they are subject to three-component simulated ground motions. To carry out this task, we develop a reduced order model (ROM) for each building typology that accounts for the effects of SSI on the building system in the time domain. We specifically use ensemble Kalman inversion (EnKI) to extract the soil impedance values from fully coupled soil-foundation-structure interaction simulations; and we interpolate the EnKI results to derive analytical functions that span the range of applicability of the soil impedance model. We then verify our ROMs by comparing results to fully coupled soil-foundation-structure interaction simulations, also known as direct modeling methods. We finally populate the simulation grid across southern California with the verified building ROMs, and interpret the responses in the form of maps that represent urban-scale effects of SSI on the seismic demand parameters such as maximum displacement, acceleration, and interstory drift. We also identify areas where the effects of SSI, given the resonant characteristics of a specific building, the foundation typology, and the local site conditions, lead to higher seismic demand relative to the fixed-base response.


ISSN: 0037-1106
EISSN: 1943-3573
Serial Title: Bulletin of the Seismological Society of America
Serial Volume: 113
Serial Issue: 6
Title: Soil-structure interaction effects on a regional scale through ground-motion simulations and reduced order models; a case study from the 2008 M (sub w) 5.4 Chino Hills mainshock
Affiliation: Universidad Tecnica Federico Santa Maria, Departamento de Obras Civiles, Valparaiso, Chile
Pages: 2557-2573
Published: 20230726
Text Language: English
Publisher: Seismological Society of America, Berkeley, CA, United States
References: 56
Accession Number: 2023-055451
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 4 tables, geol. sketch map
N34°00'00" - N35°45'00", W117°40'00" - W114°15'00"
Secondary Affiliation: Universidad EAFIT, Medellin, COL, ColombiaCalifornia Institute of Technology, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2023, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202334
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