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Evaluation of deformation of tunnel structure due to Izu‐Oshima‐Kinkai earthquake of 1978
Author(s) -
Kawakami Hideji
Publication year - 1984
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.4290120306
Subject(s) - seismology , geology , deformation (meteorology) , fault (geology) , residual , geotechnical engineering , transverse plane , structural engineering , engineering , oceanography , algorithm , computer science
Abstract Due to the Izu‐Oshima‐Kinkai earthquake of 1978, the Inatori tunnel, a single‐track railway tunnel in Japan, was severely damaged. This damage was mainly caused by the main fault and a subsidiary fault which is estimated to have traversed the tunnel. The objective of this paper is to evaluate the performance of available mathematical models of earthquake wave propagation by taking advantage of the actual damage data of this tunnel. This paper has also the purpose of contributing to the earthquake‐resistant design procedure of the tunnel in the source region by estimating its deformation using the fault mechanical model. In this paper using a set of fault parameters previously proposed by seismologists for the Izu‐Oshima‐Kinkai earthquake, the longitudinal, transverse and vertical displacements of the tunnel axis are computed. These computed results are then compared with the surveyed residual deformation. For each of three deformation components a similar trend can be recognized, and the comparison indicates that a reasonably good correlation exists between these surveyed and computed displacements.