RESPONSE CONTROL OF CANTILEVERED RC WALLS IN GYMNASIA WITH ENERGY-DISSIPATION ROOF BEARINGS

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  • NARITA Kazuhiko
    Ibaraki Prefectural Office, M. Eng.
  • TERAZAWA Yuki
    Graduate Student, Dept. of Arch. and Build. Eng., Tokyo Institute of Technology
  • MATSUI Ryota
    Assist. Prof., Dept. of Arch. and Build. Eng., Tokyo Institute of Technology, Dr. Eng.
  • TAKEUCHI Toru
    Prof., Dept. of Arch. and Build. Eng., Tokyo Institute of Technology, Dr. Eng.

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Other Title
  • エネルギー吸収型支承を用いた体育館RC片持架構の応答制御
  • エネルギー キュウシュウガタシショウ オ モチイタ タイイクカン RC カタモチカコウ ノ オウトウ セイギョ

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Abstract

A large numbers of steel roof bearings in RC gymnasia are damaged at 2011 Tohoku Earthquake, and out-of-plane response of cantilevered RC walls supporting the roof frame is identified as one of main causes of damage. In order to use these gymnasia as shelters after the earthquake, they are required seismic retrofit. However, a conventional seismic retrofit method requires strengthening bearings with steel corner plates and replacing all the roof braces, which is uneconomical. In this paper, a seismic retrofit method inserting energy-dissipation elements into roof bearings is discussed and their response reduction effects on the gymnasium are investigated. Furthermore, a simplified response evaluation method using equivalent SDOF system and equivalent linearization technique are proposed to determine the optimum design of the energy-dissipation bearings.

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