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Information Journal Paper

Title

Site Effect Evaluation in Basin Edge Using Microtremor Data and Numerical Modeling

Pages

  53-68

Abstract

 Despite extensive studies on the Microtremor processing technics and horizontal to vertical (H/V) spectral ratio analysis, limited studies have been tried to interpret the observations and experimental results and confirming them via two and three-dimensional numerical modeling. The present article deals with this issue by selecting the Urmia alluvial basin. Previous seismic microzonation studies in this city show a broad peak or two neighboring peaks, close to each other at some points near to the edge of sedimentary basin. By examining the transfer functions obtained from onedimensional and two-dimensional numerical analysis performed on an east-west section of the Urmia sedimentary basin, it was found that this issue could be due to a sudden change in thickness of the soil profiles on either side of measuring point and coupling of shear waves passing through these two different environments. This study shows a very good agreement between the frequency position of the two neighboring peaks between the H/V curve and two-dimensional transfer function. In addition, this study shows that when two-dimensional site effect is predominant, the resonance frequencies are higher compared to one-dimensional conditions. This study also suggests that for recognition of the real peaks in H/V curves, the variation trend of dominant frequencies between the different measuring points in study area should be considered and each curve should not be evaluated individually.

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    APA: Copy

    Kouklanifar, Mahdi, HAGHSHENAS, EBRAHIM, Kamalian, Mohsen, & Bahadori, Hadi. (2020). Site Effect Evaluation in Basin Edge Using Microtremor Data and Numerical Modeling. BULLETIN OF EARTHQUAKE SCIENCE AND ENGINEERING, 7(3 ), 53-68. SID. https://sid.ir/paper/964922/en

    Vancouver: Copy

    Kouklanifar Mahdi, HAGHSHENAS EBRAHIM, Kamalian Mohsen, Bahadori Hadi. Site Effect Evaluation in Basin Edge Using Microtremor Data and Numerical Modeling. BULLETIN OF EARTHQUAKE SCIENCE AND ENGINEERING[Internet]. 2020;7(3 ):53-68. Available from: https://sid.ir/paper/964922/en

    IEEE: Copy

    Mahdi Kouklanifar, EBRAHIM HAGHSHENAS, Mohsen Kamalian, and Hadi Bahadori, “Site Effect Evaluation in Basin Edge Using Microtremor Data and Numerical Modeling,” BULLETIN OF EARTHQUAKE SCIENCE AND ENGINEERING, vol. 7, no. 3 , pp. 53–68, 2020, [Online]. Available: https://sid.ir/paper/964922/en

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