• Title/Summary/Keyword: 지진 방재

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Method of Earthquake Acceleration Estimation for Predicting Damage to Arbitrary Location Structures based on Artificial Intelligence (임의 위치 구조물의 손상예측을 위한 인공지능 기반 지진가속도 추정방법 )

  • Kyeong-Seok Lee;Young-Deuk Seo;Eun-Rim Baek
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.27 no.3
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    • pp.71-79
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    • 2023

  • It is not efficient to install a maintenance system that measures seismic acceleration and displacement on all bridges and buildings to evaluate the safety of structures after an earthquake occurs. In order to maintain this, an on-site investigation is conducted. Therefore, it takes a lot of time when the scope of the investigation is wide. As a result, secondary damage may occur, so it is necessary to predict the safety of individual structures quickly. The method of estimating earthquake damage of a structure includes a finite element analysis method using approved seismic information and a structural analysis model. Therefore, it is necessary to predict the seismic information generated at arbitrary location in order to quickly determine structure damage. In this study, methods to predict the ground response spectrum and acceleration time history at arbitrary location using linear estimation methods, and artificial neural network learning methods based on seismic observation data were proposed and their applicability was evaluated. In the case of the linear estimation method, the error was small when the locations of nearby observatories were gathered, but the error increased significantly when it was spread. In the case of the artificial neural network learning method, it could be estimated with a lower level of error under the same conditions.

  • https://doi.org/10.11112/jksmi.2023.27.3.71 인용 PDF

Application of Moment Tensor Inversion to Small Local Earthquakes in the Korean Peninsula (한반도의 소규모지진 모멘트 텐서 역산의 응용)

  • Kim, So-Gu;Van, Phan Thi Kim;Lee, Seoung-Kyu
    • Journal of the Korean Society of Hazard Mitigation
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    • v.1 no.3 s.3
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    • pp.123-136
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    • 2001

  • The purpose of application of moment tensor inversion method is to determine source parameters, such as, focal mechanism, seismic moment and source depth. This paper presents results of focal mechanism solutions of 14 recent events with magnitudes ranging from M3.3 to M4.8 by using moment tensor inversion method called TDMT_INV. The strike of faults is in the direction of NE-SW and NW-SE with the movement of strike-slip or strike-slip of minor reverse component. The compressional axis of the stress field is predominantly E-W or ENE-WSW except for some faults, which are distributed at Ryongnam Massif and Wonsan, they have a compressional axis of N-S or NNW-SSE.

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