Journal of Structural Engineering, A
Online ISSN : 1881-820X
Earthquake Engineering
Explanation of jumping behavior of Chozu-sha in view of dynamics of discontinuous system
Kazutoshi SugimotoTomoyo TaniguchiKyosuke MukaiboYusuke Ono
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2017 Volume 63A Pages 279-288


At Kumamoto earthquake on April 16, 2016, at 1:25 AM, the jumping behavior of the unanchored wooden structure named Chozu-sha was reported. To explain it in view of dynamics of discontinuous systems, the Chozu-sha is modeled by two-story rigid rectangular block, and its equations of motion are derived. Employing a corresponding recorded accelerogram, its jumping motion is computed. Comparison of the jumping distance computed with that reported yields that the proposed procedure may explain a major mechanism of the jumping of the Chozu-sha. Its essence is that the jumping distance is elongated if the horizontal acceleration which is larger than the rocking commencement acceleration but is smaller than the maximum acceleration lasts longer.

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© 2017 by Japan Society of Civil Engineers
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