Geomechanics and Engineering

  • 제22권1호
  • /
  • Pages.25-33
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  • 2020
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Incorporating ground motion effects into Sasaki and Tamura prediction equations of liquefaction-induced uplift of underground structures

  • Chou, Jui-Ching (Department of Civil Engineering, National Chung Hsing University) ;
  • Lin, Der-Guey (Department of Soil and Water Conservation, National Chung Hsing University)
  • 투고 : 2020.01.30
  • 심사 : 2020.05.18
  • 발행 : 2020.07.10
⟨ 이전 논문 다음 논문 ⟩

초록

In metropolitan areas, the quantity and density of the underground structure increase rapidly in recent years. Even though most damage incidents of the underground structure were minor, there were still few incidents causing a great loss in lives and economy. Therefore, the safety evaluation of the underground structure becomes an important issue in the disaster prevention plan. Liquefaction induced uplift is one important factor damaging the underground structure. In order to perform a preliminary evaluation on the safety of the underground structure, simplified prediction equations were introduced to provide a first order estimation of the liquefaction induced uplift. From previous studies, the input motion is a major factor affecting the magnitude of the uplift. However, effects of the input motion were not studied and included in these equations in an appropriate and rational manner. In this article, a numerical simulation approach (FLAC program with UBCSAND model) is adopted to study effects of the input motion on the uplift. Numerical results show that the uplift and the Arias Intensity (Ia) are closely related. A simple modification procedure to include the input motion effects in the Sasaki and Tamura prediction equation is proposed in this article for engineering practices.

키워드

과제정보

This research is funded by the Office of Research and Development of National Chung-Hsing University (NCHU) and Ministry of Science and Technology, Taiwan, R.O.C. under Grant no. MOST 107-2218-E-005-020-MY2. I also like to thank the National Center for Research on Earthquake Engineering (NCREE) for providing the catalog of earthquake motions.

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