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M. Fukuda
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Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Geotechnical damage due to the 2016 Kumamoto Earthquake and future challenges H. Hazarika; T. Kokusho; R.E. Kayen; S. Dashti; H. Fukuoka; T. Ishizawa; Y. Kochi; D. Matsumoto; H. Furuichi; T. Hirose; T. Fujishiro; K. Okamoto; M. Tajiri; M. Fukuda
Lowland Technology International Vol 19 No 3, Dec (2017)
Publisher : International Association of Lowland Technology

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The 2016 Kumamoto earthquake with a moment magnitude of 7.0 (Japanese intensity = 7) that struck on April 16 brought devastation in many areas of Kumamoto Prefecture and partly in Oita Prefecture in Kyushu Region, Japan. The earthquake preceded a foreshock of magnitude 6.5 (Japanese intensity = 7) on April 14. This paper summarizes the damage brought to geotechnical structures by the two consecutive earthquakes within a span of twenty-eight hours. The paper highlighted some of the observed damage and identifies reasons for such damage. The geotechnical challenges towards mitigation of losses from such earthquakes are also suggested.
Restoration of damaged stone walls of Kumamoto castle due to the 2016 Kumamoto Earthquake M. Fukuda
Lowland Technology International Vol 19 No 4, March (2018)
Publisher : International Association of Lowland Technology

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The 2017 Kumamoto earthquake caused damages to many stone walls of Kumamoto castle. Paper shows facing curves of deformed or collapsed stone walls can be interpreted comparing with the traditional guideline contributed to the stone piling technique. Reconstruction works are aimed to return the collapsed stone wall to the original features. The original curve of stone wall is possibly evaluated at the remained stone wall adding the existing measurement data. There were many deformed stone wall of Kumamoto castle before the 2016 Kumamoto earthquake. The stone wall is congenitally fragile to deform. Deformation level is evaluated comparing the deformed curve of stone wall and the traditional stone piling guidelinel. Stability analysis of stone wall should include deflected facings of stone wall. Paper shows the role of depth of stone wall on the base of thin skeleton model of stability analysis.
Co-Authors D. Matsumoto H. Fukuoka H. Furuichi H. Hazarika K. Okamoto M. Tajiri R.E. Kayen S. Dashti T. Fujishiro T. Hirose T. Ishizawa T. Kokusho Y. Kochi