A Site Amplification Model for Crustal Earthquakes

Sandıkkaya, M. Abdullah; Dinsever, L.

doi:10.3390/geosciences8070264

Cited by 12 publications

(6 citation statements)

References 32 publications

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“…This comparison confirms the reliability of the proposed formulation. The comparison with the empirical site amplification model by Sandikkaya and Dinsever 50 and Seyhan and Stewart, 51 as reported by Sandikkaya and Dinsever 50 , shows that the shape of soil factors for soil class C are quite similar, with the minimum value that is higher in this study (Figure 19A). The major difference is represented by soil factors of soil class B.…”

Section: Definitions Of the Analytical Formulation Of Soil Amplificat...supporting

confidence: 71%

Nonlinear soil effects on observed and simulated response spectra

Andreotti

Calvi

2021

Earthq Engng Struct Dyn

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Soil effects are collectively referred to the influences that local geology and morphology of soil deposits have on ground motions coming from bedrock. The quantification of soil effects in building codes has a great impact in the design of structures because soil factors amplify the reference seismic input, which is typically defined for rock‐type soil class from probabilistic seismic hazards analysis. This topic, within earthquake engineering, represents one of the typical interfaces between structural engineering, geotechnical engineering and engineering seismology. In fact, this issue is generally addressed with different approaches depending on the background of the researchers. This article investigates soil effects combining the viewpoints of structural and geotechnical engineers and seismologists. It is shown that the averaging technique adopted for the definition of ground motion predictive models for spectral ordinates does not play a significant role in defining the results of rock‐like soil classes. However, for other soil classes characterized by soil effects, different methods of averaging the spectral ordinates produce significant differences. The main result of this study is the proposal of a new analytical formulation for the quantification of soil amplification factors for both acceleration and displacement response spectra. The proposed formulation is based on a database of real ground motions and simulated accelerograms. The latter have been obtained through stochastic ground response analyses, with the propagation of natural ground motions on rock‐like soil class through randomly generated soil deposits representative of different soil classes of Eurocode 8 and the Italian Building Code. The comparison between real and simulated data revealed the crucial role of soil nonlinearity in the definition of soil effects, which is also in relation with the variation of magnitude, fault distance and the intensity measures expected on outcropping rock.

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Section: Definitions Of the Analytical Formulation Of Soil Amplificat...supporting

confidence: 71%

Nonlinear soil effects on observed and simulated response spectra

Andreotti

Calvi

2021

Earthq Engng Struct Dyn

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“…Characterisation and amplification of the ground motion according to the design code amplification model of Pitilakis et al (2018) 4. The empirical nonlinear amplification model of Sandikkaya and Dinsever (2018), based on V S30 and depth to the 1 km/s V S layer (Z 1.0 ). 5.…”

Section: Comparing Site Amplification Characterisation In the Context...mentioning

confidence: 99%

Modelling site response at regional scale for the 2020 European Seismic Risk Model (ESRM20)

Weatherill

Crowley

Roullé

et al. 2022

Bull Earthquake Eng

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Quantitative estimation of seismic risk over a region requires both an underlying probabilistic seismic hazard model and a means to characterise shallow site response over a large scale. The 2020 European Seismic Risk Model (ESRM20) builds on the 2020 European Seismic Hazard Model (ESHM20), requiring additional information to firstly parameterise the local site condition across all of Europe, and subsequently determine its influence on the prediction of seismic ground motion. Initially, a harmonised digital geological database for Europe is compiled, alongside a model of topographic/bathymetric elevation and a database of 30 m averaged shearwave velocity measurements ($$V_{S30}$$ V S 30 ), in order to produce separate 30 arc-second maps of inferred $$V_{S30}$$ V S 30 based on topography and on geology. We then capitalise on a large database of seismic recording stations in Europe for which site-to-site ground motion residuals ($$\delta S2S_{S}$$ δ S 2 S S ) have been determined with respect to the shallow crustal ground motion model used in the ESHM20. These residuals allow us to incorporate site amplification functions into the European GMM calibrated upon either observed or inferred $$V_{S30}$$ V S 30 , or on the European geology and topography models. We present the resulting pan-European seismic site amplification model and assess its impact on seismic hazard and risk compared against other approaches. The new site amplification model fulfils the requirements of the ESRM20 and, providing uncertainty is fully propagated, yields estimates of seismic hazard and risk at a large space scale that may be comparable to other methods often applied at local/urban scale where better-constrained site information is available.

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“…(Bazzurro and Cornell, 2004;. 본 연구에서는 관련 기존 연구 (Sandikkaya et al, 2013;Chiou and Youngs, 2014;Seyhan and Stewart, 2014;Sandikkaya and Dinsever, 2018) (Stewart et al, 2015). Fig.…”

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Construction of a Site- and Period-Specific Seismic Hazard Map for the Korean Peninsula

Jee¹,

Han²

2020

J. Korean Soc. Hazard Mitig

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The 2016 Gyeongju and 2017 Pohang earthquakes caused casualties and economic damage in the surrounding areas. Therefore, the importance of earthquake damage prediction and seismic design in the Korean peninsula has increased. Probabilistic seismic hazard analysis (PSHA) is one of the well-known methods for predicting earthquake damage. The objective of this study is to construct Korean Peninsula seismic hazard maps of 5% damped response spectrum acceleration and peak ground acceleration, using PSHA. To consider the local effects for each site's classification, seismic hazard maps were constructed by considering the site amplification model. To conduct seismic design, uniform hazard response spectra (UHRS) were also constructed for the Korean peninsula.

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A Site Amplification Model for Crustal Earthquakes

Cited by 12 publications

References 32 publications

Nonlinear soil effects on observed and simulated response spectra

Nonlinear soil effects on observed and simulated response spectra

Modelling site response at regional scale for the 2020 European Seismic Risk Model (ESRM20)

Construction of a Site- and Period-Specific Seismic Hazard Map for the Korean Peninsula

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