Basin Edge Effect on Seismic Ground Response: A Parametric Study for Duzce Basin Case, Turkey

Haşal, M. Emre; İyisan, Recep; Yamanaka, Hiroaki

doi:10.1007/s13369-017-2971-7

Cited by 10 publications

(4 citation statements)

References 27 publications

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“…3 The critical shape ratio equation of Bard and Bouchon (1985) (dashed line) and the parametric analyses conducted by Chavez-Garcia and Faccioli (2000) to validate this equation Fig. 4 The threshold between 1D and 2D SRA at the edge of the Duzce basin proposed by Hasal et al (2018) The use of an aggravation factor is also supported by Makra et al (2012) who compared the results of different software for 2D SRA of a basin. The use of an aggravation factor is shown to be a powerful tool to quantify the additional amplification in response spectra in comparison with 1D SRA because of 2D effects.…”

Section: Previous Studies On the Limits Of 1d Sramentioning

confidence: 83%

“…Our study shows that even within this section of their graph there is a threshold separating geometries that clearly behave in a 2D manner and those where the 1D assumption roughly holds. Another interesting study for our purposes was performed by Hasal et al (2018), who conducted a parametric study for the Duzce basin (Turkey). They show the effect of the edge inclination (slopes of 6°, 11°, 27° and 45°) on the variation in surface motion under earthquake excitations with different frequency content.…”

Section: Previous Studies On the Limits Of 1d Sramentioning

confidence: 99%

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An accessible approach for the site response analysis of quasi-horizontal layered deposits

Volpini

Douglas

2018

Bull Earthquake Eng

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This study focusses on site response analysis for sites that are neither strictly one-dimensional (with flat parallel soil layers) nor clearly two-dimensional (steep valleys, canyons and basins). Both these types of geometries are well studied in the literature. There is a lack of studies, however, for all those geometries that are in between these two worlds, such as sites with gently dipping layers. Theoretically, such sites should be studied with a two-dimensional dynamic approach because of the formation of surface waves due to the non-horizontal layering. In certain situations, however, the one-dimensional dynamic assumption leads to minor errors and it may save a lot of effort in terms of defining a two-dimensional model, computing the response and interpreting the results. As a result of these practical advantages, an accessible approach is presented here to determine when one-dimensional analysis can be used for geometries consisting of quasi-horizontal layers. The methodology is based on the construction of a chart, delimiting the applicability of the one-dimensional approach, using simple but valid variables, such as the slope of the critical subsurface interface and the impedance contrast at this interface. Indeed, we propose our guidance on the limits of the one-dimensional analysis in the form of this power law separating the one-dimensional and two-dimensional dynamic regimes: I z = 6.95 γ −0.69 , where I z is the impedance contrast and γ is the angle in degrees of the sloping critical subsurface interface. Site response analysis for geometries with values of I z below this critical value can be computed using a standard one-dimensional approach without large error whereas geometries with values of I z above this threshold require two-dimensional calculations.

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Section: Previous Studies On the Limits Of 1d Sramentioning

confidence: 83%

Section: Previous Studies On the Limits Of 1d Sramentioning

confidence: 99%

An accessible approach for the site response analysis of quasi-horizontal layered deposits

Volpini

Douglas

2018

Bull Earthquake Eng

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“…Particularly, for trapezoidal basins, ground motion aggravation given by the edge effect was identified to occur partially or totally outside the edge wedge. This zone is either preceded or followed by a zone where deaggravation or no aggravation occurs as it has been evidenced from numerical studies of idealized shallow basins (Zhu et al ,2018b;Riga et al, 2016, Narayan andSingh, 2006) and from 3D or 2D analysis of actual basins (Bradley, 2012b;Hasal et al, 2018;Madiai et al, 2017b;Sun and Chung, 2008).…”

Section: Aggravation Factors For 2d Site Effects In Basin Geological Configurationsmentioning

confidence: 94%

Aggravation factors for 2D site effects in sedimentary basins: The case of Norcia, central Italy

Rodriguez-Plata

Özcebe

Smerzini

et al. 2021

Soil Dynamics and Earthquake Engineering

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In this article the seismic site response in the Norcia basin, Central Italy, during the October 2016 M 6.5 earthquake, has been analyzed using both 1D and 2D ground response numerical models. Period-dependent aggravation factors (PDAFs) quantifying the difference between 2D and 1D site response are provided for two representative cross-sections of the basin. Time-domain linear visco-elastic and nonlinear analyses were carried out with the finite difference commercial program FLAC2D. Although the basin sediments are constituted by rather stiff soils, the Norcia basin is found to produce a consistent modification and enhancement of ground motion. It is shown that the most important source of ground motion aggravation was the generation of Rayleigh waves at the basin edges. The variation of the PDAFs was explored by considering the effects of frequency content of input motion, damping ratio, irregularity of the alluvial-bedrock interface and the non-linear response of the sediments.

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“…Some of its notable examples can be tracked in Turkey. The recorded damage patterns during 1996 Dinar earthquake [16] as well as November 12, 1999 Duzce earthquake [17] revealed the necessity of the consideration of the basin edge effect in earthquake design codes. In this study, the different dynamic behavior at the edge of two basins with respect to the basin center is investigated.…”

Section: Introductionmentioning

confidence: 99%

Basin Edge Effect at Turkish Basins: The Case Study of Dinar and Duzce Basins

Khanbabazadeh¹,

İyisan²,

Hasal³

et al. 2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Several studies have revealed that the inclined bedrock at the sides of the basins bring about the concentration of damages, which well known as basin edge effect. As a seismically active area much of the Turkey lies on the Anatolian Plate. This small plate bounded by two major strike-slip fault zones, the North Anatolian Fault and East Anatolian Fault. During the history, Turkey has been the site of devastating earthquakes. Severe structural damage at basin sides during recent major earthquakes around the world strongly pointed out the importance of basin edge effect. Some of its notable examples can be tracked in Turkey. With respect to the fact that Turkey is among the top 20 percent of all countries exposed to earthquake hazard with regard to mortality and economic losses, the necessity of the investigation and consideration of the basin edge effect in earthquake design codes is revealed. In this study, the dynamic behavior at the edge of two real basins is investigated. In this study, at the first, the basin edge model of the basins are extracted from the data obtained from extensive microtremor surveys and geotechnical investigations as well as insitu studies including SPT, CPT, PS logging tests. Then, the idealized geometry of the Dinar and Duzce basins edge models are proposed. Afterwards, the basins are subjected to the collection of strong ground motions using a fully nonlinear method which works based on explicit finite difference scheme FLAC3D code. The 5566 COMPDYN 2019 7 th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering M. Papadrakakis, M. Fragiadakis (eds.

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Basin Edge Effect on Seismic Ground Response: A Parametric Study for Duzce Basin Case, Turkey

Cited by 10 publications

References 27 publications

An accessible approach for the site response analysis of quasi-horizontal layered deposits

An accessible approach for the site response analysis of quasi-horizontal layered deposits

Aggravation factors for 2D site effects in sedimentary basins: The case of Norcia, central Italy

Basin Edge Effect at Turkish Basins: The Case Study of Dinar and Duzce Basins

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