Single-station microtremor surveys for site characterization:A case study in Erzurum city,eastern Turkey  

作　　者：Fatih Karsli Erdem Bayrak 

机构地区：[1]The Higher Education Credit and Hostels Institution,Ministry of Youth and Sports,Erzurum 25240,Turkey [2]Earthquake Research Centre,Ataturk University,Erzurum 25240,Turkey [3]Department of Civil Engineering,Ataturk University,Erzurum 25240,Turkey

出　　处：《Earthquake Engineering and Engineering Vibration》2024年第3期563-576,共14页地震工程与工程振动（英文刊）

摘　　要：The single-station microtremor method is one of the fastest,most reliable,and cheapest methods used to identify dynamic soil properties.This study utilizes 49 single-station microtremor measurements to identify the dynamic soil properties of the Hilalkent quarter of the Yakutiye district in Erzurum.Soil dominant frequency and the amplification factor were calculated by using the Nakamura horizontal/vertical spectral ratio(H/V)method.While the soil dominant frequency values varied between 0.4 Hz and 10 Hz,the soil amplification factor changed between 1 and 10.Higher H/V values were acquired with lower frequency values.The vulnerability index(K_(g))and shear strain parameters that are utilized to estimate the damage that may be caused by an earthquake were mapped.Especially in the west side of the study area,higher K_(g) values were observed.The shear strain map was created with 0.25 g,0.50 g and 0.75 g bedrock accelerations,and soil types that lost elasticity during an earthquake were identified.The average shear wave velocity for the first 30 m(V_(s30))was calculated.Finally,it was observed that the western part of the study area,which resulted in a higher period and higher H/V,higher K_(g) and lower V_(s30) values,presents a higher risk of damage during an earthquake.

关 键 词：Nakamura horizontal/vertical spectral ratio single-station microtremor predominant frequency vulnerability index Erzurum 

分 类 号：P315.9[天文地球—地震学]