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Mikrotremor Verilerinde Çapraz Spektrum ve Güç Spektrumu Tekniği Kullanılarak Zemin Büyütmesinin Belirlenmesi
2023
Journal:  
Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi
Author:  
Abstract:

Zemin büyütmesi ve etkin frekansların belirlenmesinde en çok tercih edilen yöntem Nakamura HVSR tekniğidir. Çapraz Spektrum ve Güç Spektrumu tekniği; yatay ve düşey bileşenin çapraz spektrumunun, düşey bileşenin güç spektrumuna oranlanması temeline dayanan bir tekniktir. Bu çalışmada, Burdur İl Merkezinde yapılan mikrotremor çalışmalarına ait sonuçlar HVSR Tekniği ile birlikte Çapraz Spektrum ve Güç Spektrumu Tekniğini kullanarak veriler değerlendirilmiş ve karşılaştırılmıştır. Her iki yöntemde elde edilen etkin frekanslar % 96 ile %100 arasında değişen bir oranda uyumlu sonuçlar vermiştir. Buna karşın bu frekanslarda, HVSR spektrumları zemin büyütmesi değerleri %20 ile % 60 daha büyük değerler vermiştir. HVSR tekniğinden hesaplanan hasar görebilirlik katsayıları 0,7 ile 4,3 arasında değişen değerler verirken, Çapraz Spektrum ve Güç Spektrumu tekniğinden hesaplanan hasar görebilirlik katsayıları ise 0,1 ile 4,8 arasında değişen değerler vermiştir. Genel olarak her iki yöntemde de yüksek frekanslarda büyütme değerlerinde bir artış olduğu görülmüştür. Zemin büyütmesi ve hasar görebilirlik değerlerinin büyük olduğu noktalar, Burdur İl merkezini etkileyecek bir deprem anında yüksek yapısal hasar riski olan alanları göstermesi bakımından önemlidir.

Keywords:

Determination of the Growth of the Floor by using Intermediate Spectrum and Power Spectrum Technique in Microtremor Data
2023
Author:  
Abstract:

The most popular method in the extension of the ground and the determination of effective frequencies is Nakamura HVSR technique. Cross-spectrum and power spectrum technique is a technique based on the base of the cross-spectrum of the horizontal and rated component, the rated component’s power spectrum. In this study, the results of the microtremor studies carried out at the Burdur Provincial Center were evaluated and compared with the data using the HVSR Technique with the Intermediate Spectrum and Power Spectrum Technique. The effective frequencies obtained in both methods gave compatible results at a rate ranging from 96% to 100%. Nevertheless, in these frequencies, the HVSR spectra gave values greater by 20% to 60%. The damage visibility ratio calculated by HVSR technology gives values ranging from 0.7 to 4.3, while the damage visibility ratio calculated by the Intermediate Spectrum and Power Spectrum technology gives values ranging from 0.1 to 4.8. In general, both methods have seen an increase in the value of expansion at high frequencies. Growth of the ground and points where the damage visibility values are large are important in terms of the area that is at high risk of structural damage at the moment of a earthquake that will affect the Burdur province center.

Keywords:

Determination Of Soil Amplification In Microtremor Data Using Cross Spectrum and Power Spectrum Techniques
2023
Author:  
Abstract:

The most preferred method for soil amplification and determination of effective frequencies is the Nakamura HVSR technique. Cross Spectrum and Power Spectrum technique; It is a technique based on the ratio of the cross spectrum of the horizontal and vertical components to the power spectrum of the vertical component. In this study, the results of the microtremor studies which were conducted in the city center of Burdur, were evaluated and compared by using the Cross Spectrum and Power Spectrum technique together with the HVSR technique. The effective frequencies were obtained in both methods which gave concurring results varying between 96% and 100%. On the other hand, at these frequencies, the ground amplification values of the HVSR spectra contributed 20% to 60% higher values. The vulnerability coefficients were calculated from the HVSR technique which gave valuesranging from 0,7 to 4,3 while the calculated vulnerability coefficients from the Cross Spectrum and Power Spectrum technique resulted ranging from 0,1 to 4,8. In general, it was observed that there was an increase in magnification values at high frequencies in both methods. The points where the soil amplification and vulnerability values are high are important in terms of showing the areas with high risk of structural damage in the event of an earthquake that will affect the city center of Burdur.

Keywords:

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Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi

Field :   Mühendislik; Fen Bilimleri ve Matematik

Journal Type :   Ulusal

Metrics
Article : 260
Cite : 119
Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi