A numerical study on the 2D behavior of the single and layered clayey basins

Khanbabazadeh, Hadi; İyisan, Recep

doi:10.1007/s10518-014-9590-4

Cited by 19 publications

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The verification of this analysis has been done by comparing to the solution of Kawase and Aki (1989) [28], and presented at [29] and Khanbabazadeh and Iyisan (2014 a,b) [30][31]. The solution of the trapezoidal valley by Kawase and Aki (1989) [28] has been tested by Zahradnik (1995) [32] and Gil-Zepeda et al (2003) [33], among the others.…”

Section: Analysis Methodsmentioning

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Analysis Methodsmentioning

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…The same acceleration pattern has been captured across the model surface and given in Figure 11. The result of the Kawase and Aki (1989) analysis also has been tested by Iyisan and Khanbabazadeh (2014), Gil-Zepeda et al (2003). The properties of the materials in the model have been defined by 1000-2500 m/s shear wave velocities (Vs), and the unit weight of materials have been taken as the same to provide a constant impedance value concerning the compared model.…”

Section: Verification Of the Wave Propagationmentioning

confidence: 99%

Assessment of the Design Spectrum with Aggravation Factors by 2D Nonlinear Numerical Analyses: A Case Study in Gemlik Basin, Turkey

Özaslan

İyisan

Hasal

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

The response spectra of multidimensional analyses are compared with the one-dimensional (1D) local models to couple the irregular soil stratification effect in a site. In recent studies, the surface motion spectra ratios of 2D/1D or 3D/1D are defined as spectral aggravation factors for each region in a site. Particularly in alluvial basins, where the soil media is typically formed by fault ruptures or topographic depressions filled with sediments, the inclination of the rock outcrop in the edge of the basin has a considerable effect on the site response, and such effect has not yet been taken into consideration of recent seismic building codes and general engineering applications. In this study, the natural alluvial basin near the North Anatolian Fault in Gemlik, Maramara Region, Turkey, was investigated by 40 seismic site tests and 4 validation borings. The 2D and 1D nonlinear response history analyses in north-south and east-west directions of the Gemlik basin were performed by numerical model on finite difference scheme considering nonlinear elasto-plastic material behaviors and geometric discontinuities. 22 strong ground motions recorded on rock site are excited vertically as SH waves. The numerical results exhibited the narrow basin effects are derived not only by reflection, refraction, and shifting behavior but also by focusing and superposition of the seismic waves propagating from both opposite basin edges. As a result, the site-specific spectral aggravation factors, SAF2D/1D defined by the ratio between the 2D and 1D acceleration response spectra for each period and any location on the site, were proposed for the Gemlik basin. The variations of the aggravation factors were observed as increasing values to 1.2–2.2 on the near edge and basin center.

show abstract

“…Extensive researches have been conducted to optimize ground seismic response analysis (e.g., [21][22][23][24][25][26][27][28][29]). For example, Lermo and Ch avez-Garc a [30] referred to the limitations of the classic method of spectral analysis, especially limitations imposed on eld operation and the process of recording data.…”

Section: Introductionmentioning

confidence: 99%

Non-linear Seismic Ground Response Analysis Considering Two-dimensional Topographic Irregularities

Soltani

Bagheripour

2017

Scientia Iranica

View full text Add to dashboard Cite

Abstract. In the occurrence of an earthquake, local site conditions such as soil characteristics, dimension of topographic irregularities, seismic bedrock depth, etc. as well as characteristics of incident wave have important e ects on seismic ground response. In this study, Finite Element Method (FEM) coupled with viscous boundaries is used to evaluate the e ect of empty two-dimensional valleys on ampli cation or attenuation of seismic waves. Parametric studies are carried out and the e ects of dimension of the topography, frequency of the incident wave, and bedrock depth on the seismic ground response are considered using non-linear method in a time domain analysis. Results are shown by means of horizontal and vertical ampli cation ratios in valley span and its surrounding area. It is concluded that displacement variation on ground surface due to topographical e ects is a considerable factor to select a site location or design structures in the valley mount and its surrounding area.

show abstract

A numerical study on the 2D behavior of the single and layered clayey basins

Cited by 19 publications

References 28 publications

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

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

Assessment of the Design Spectrum with Aggravation Factors by 2D Nonlinear Numerical Analyses: A Case Study in Gemlik Basin, Turkey

Non-linear Seismic Ground Response Analysis Considering Two-dimensional Topographic Irregularities

Contact Info

Product

Resources

About