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Smart Structures and Systems
  Volume 15, Number 3, March 2015 , pages 881-896

Drift displacement data based estimation of cumulative plastic deformation ratios for buildings
Akira Nishitani, Chisa Matsui, Yushiro Hara, Ping Xiang, Yoshihiro Nitta,Tomohiko Hatada, Ryota Katamura, Iwao Matsuya and Takashi Tanii

    The authors\' research group has developed a noncontact type of sensors which directly measure the inter-story drift displacements of a building during a seismic event. Soon after that event, such seismically-induced drift displacement data would provide structural engineers with useful information to judge how the stories have been damaged. This paper presents a scheme of estimating the story cumulative plastic deformation ratios based on such measured drift displacement information toward the building safety monitoring. The presented scheme requires the data of story drift displacements and the ground motion acceleration. The involved calculations are rather simple without any detailed information on structural elements required: the story hysteresis loops are first estimated and then the cumulative plastic deformation ratio of each story is evaluated from the estimated hysteresis. The effectiveness of the scheme is demonstrated by utilizing the data of full-scale building model experiment performed at E-defense and conducting numerical simulations.
Key Words
    inter-story drift displacement; hysteresis; cumulative plastic deformation ratio; E-defense
Akira Nishitani, Yushiro Hara, Ping Xiang and Takashi Tanii: Faculty of Science and Engineering, Waseda Univ., Shinjuku, Tokyo 169-8555 Japan
Chisa Matsui: Tokyo Metropolitan Government, Shinjuku, Tokyo 163-8001 Japan
Yoshihiro Nitta: Department of Architecture, Ashikaga Institute of Technology, Tochigi 326-8558 Japan
Tomohiko Hatada and Ryota Katamura: Kajima Technical Research Institute, Chofu, Tokyo 182-0036 Japan
Iwao Matsuya: Department of Mechanical Engineering, Nagaoka Univ. of Technology, Nagaoka, Niigata 940-2188 Japan

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