In-situ and numerical assessments to evaluate site effects in Orta-Çankırı province by comparative geophysical and geotechnical investigations

Download

index.pdf

Date

2016

Author

Eker, Arif Mert

Metadata

Show full item record

Item Usage Stats

117
views

155
downloads

Local site conditions of Orta district in Çankırı were deduced from in-situ measurements of dynamic and geotechnical properties of the soils in the context of evaluation of the site effects under a possible earthquake. The study area is under the control of active faults in the form of a strike slip basin and is almost entirely located within this basin. Plio-Quaternary and especially Quaternary alluvial sediment conditions were determined through the development of a geo-engineering database for the study area. The database was constructed by the results obtained by destructive geotechnical and non-destructive geophysical field methods along with geotechnical laboratory tests. In order to identify the dynamic soil behavior within the Orta pull apart basin under a possible ground motion, 1D and 2D numerical analyses utilizing equivalent linear approach were performed. Additionally, an experimental site effect study was carried out by using a single mobile velocimeter in the study area. The results of the microtremor method and the numerical analyses were compared with each other and the performances of the utilized methods were evaluated to determine the site effects at the study area. As a result, the seismic responses of the young and soft sedimentary units within the Orta pull apart basin have been proposed.

Subject Keywords

Seismology., Microseisms., Geophysics, Geodynamics.

URI

http://etd.lib.metu.edu.tr/upload/12619939/index.pdf
https://hdl.handle.net/11511/25609

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Evaluation of Site Response with Alternative Methods: A Case Study for Engineering Implications Sisman, Fatma Nurten; Askan Gündoğan, Ayşegül; Asten, Michael (Springer Science and Business Media LLC, 2018-01-01) In this paper, efficiency of alternative geophysical techniques for site response is evaluated in two sedimentary basins on the North Anatolian Fault Zone. For this purpose, fundamental frequencies of soils and corresponding amplitudes obtained from empirical horizontal-to-vertical spectral ratio curves from microtremors, weak motions and strong motions are compared with results from one-dimensional theoretical transfer functions. Theoretical transfer functions are computed using S-wave velocity profiles de...
A study for the development of seismic design specifications for coastal structures Gözpınar, Erdem; Yalçıner, Ahmet Cevdet; Ergin, Ayşe; Department of Civil Engineering (2003) An evolving design philosophy for port structures in many seismically active regions reflects the observations that: -The deformations in ground and foundation soils and the corresponding structural deformation and stress states are key design parameters. -Conventional limit equilibrium-based methods are not well suited to evaluating these parameters. -Some residual deformation may be acceptable. Performance-based design is an emerging methodology whose goal is to overcome the limitations present in convent...
The defect state of Yb-doped ZnO nanoparticles using thermoluminescence study Hasanlı, Nızamı (Elsevier BV, 2019-09-01) Shallow trapping centers in Yb-doped ZnO nanoparticles were determined using thermoluminescence (TL) measurements applied in the 10-300 K temperature region. Undoped and Yb-doped ZnO nanoparticles were synthesized by sol-gel method. TL glow curve of undoped nano-particles presented three peaks around 56, 108 and 150 K whereas one additional peak around 83 K was observed in the TL curve of Yb-doped ZnO nano-particles. The increase of Yb concentration in the nanoparticles increased the TL intensity of this ad...
Response of asymmetric isolated buildings under bidirectional excitations of near-fault ground motions Fitoz, Hatice Eda; Akyüz, Uğurhan; Department of Civil Engineering (2012) Isolator displacements, floor accelerations, roof displacements, base shear and torsional moments are basic parameters that are considered in the design of seismically isolated structures. The aim of this study is to evaluate the effects of bidirectional earthquake excitations of near fault records on the response of base isolated structures in terms of basic parameters mentioned above. These parameters computed from nonlinear response history analysis (RHA) and they are compared with the parameters compute...
3-D basin geometry model to determine the site effects based on geophysical and geotechnical data: Case study at near-field and high seismicity area of Gölyaka, Düzce, Turkey. Yousefibavil, Karim; Koçkar, Mustafa Kerem; Akgün, Haluk (2018-04-13) The near-field and high seismicity of the area makes the determination of the bedrock geometry more complex and pioneers the studies of site response analysis in account for a seismic hazard assessment. Without a good model of basin structure, any powerful calculation method would lack a well-developed basin response. The study has been conducted in the Gölyaka basin that uniquely falls within the bifurcated near-field section of the North Anatolian Fault System. The surface rupture of the 1999 Earthquakes ...

Citation Formats

A. M. Eker, “In-situ and numerical assessments to evaluate site effects in Orta-Çankırı province by comparative geophysical and geotechnical investigations,” Ph.D. - Doctoral Program, Middle East Technical University, 2016.