Shallow Vs Structure Imaged With the Ambient Noise Recorded by a Telecommunication Fiber-Optic Cable in Urban Area
Date: 4/26/2019
Time: 01:30 PM
Room: Pine
The shear wave velocity structure is a key parameter in site response estimation and it is imaged with various methods. The ambient noise tomography (ANT) has been successfully used to image Vs structure at shallow depths. In previous studies, short-period surface wave signal is extracted from the continuous ambient noise recorded by the Distributed Acoustic Sensing (DAS) technique with fiber-optic cables buried in shallow trenches, which is employed to construct Vs model in test sites. A 5.2 km long telecommunication fiber-optic cable buried at about 30-cm depth in urban area is used to record more than 10-hours continuous ambient noise. The high-frequency (~ 10 Hz) Rayleigh wave signal emerges on the noise cross-correlation functions. The dispersion information of Rayleigh wave is inverted for Vs at the top 30 m and construct a 2D profile, which helps to assess ground shaking in this area.
Presenting Author: Xiangfang Zeng
Authors
Xiangfang Zeng zengxf_whigg@outlook.com Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan, , China (Mainland) Presenting Author
Corresponding Author
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Baoshan Wang bwgeo@ustc.edu.cn University of Science and Technology of China, Hefei, , China (Mainland) |
Xiaobin Li 17920082@qq.com Earthquake Administration of Yunnan Province, Kunming, , China (Mainland) |
Weiwei Xu wwxu@cea-igp.ac.cn Institute of Geophysics, China Earthquake Administration, Beijing, , China (Mainland) |
Shanhui Xu xushanhuia@126.com Institute of Geophysics, China Earthquake Administration, Beijing, , China (Mainland) |
Zhenghong Song song_zhenghong@163.com University of Science and Technology of China, Hefei, , China (Mainland) |
Shallow Vs Structure Imaged With the Ambient Noise Recorded by a Telecommunication Fiber-Optic Cable in Urban Area
Category
Methods for Site Response Estimation