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Belay, T., Tesfay, I., Ayalew, A., Yohannes, G., Zewdie, T., Bekele, H., Tadesse, M.T., Demisse, T. and Alemu, T. (2009) Basic Geoscience Mapping Core Process: Geology of the Were-Ilu Area. Memoir 25, Geologic Survey of Ethiopia, Addis Ababa.

has been cited by the following article:

• TITLE: Simplified Full Dynamic Analysis of a Railway Tunnel in Ethiopia

  AUTHORS: Henok Fikre Gebregziabher, Tequamework Assefa

  KEYWORDS: Acceleration Time History, Probabilistic Seismic Hazard Analysis, Tunnel Stability, Dynamic Analysis, Finite Element Analysis

  JOURNAL NAME: World Journal of Engineering and Technology, Vol.9 No.3, July 27, 2021

  ABSTRACT: This paper presents an effective means of analyzing the safety of a tunnel under dynamic loading in areas with seismic records. A particular case of the railway tunnel in the earthquake-prone regions of the escarpment seismiczone of Ethiopia was the specific focus area of the research. Probabilistic seismic hazard analysis (PSHA) and deaggregation have been conducted to determine the design earthquake required as an input for the dynamic analysis. The PSHA performed by considering the operating design earthquake with conservative assumptions of the local geological features resulted in a peak ground acceleration of 0.36. Two pairs of design earthquake have been obtained from the deaggregation process, which were used to filter acceleration time histories for the selected design earthquake from the ground motion database of Pacific Earthquake Engineering Research Center. Finally, full dynamic analyses of the tunnel have been performed by applying the scaled acceleration time histories corresponding to the structure in the specific site. It was demonstrated how to prove the stability of the tunnel located in difficult ground conditions by performing plane strain analyses with the possible minimum computational efforts.