AN OPTIMAL SELECTION METHOD FOR BASE-ISOLATION DEVICES USING A GENETIC ALGORITHM IN MULTI-MASS SYSTEM : Part 2 Analysis for mid-story isolation model

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  • 多質点系構造物モデルにおける遺伝的アルゴリズムによる免震装置の最適選択計画 : その2 中間層免震の場合
  • タシツテンケイ コウゾウブツ モデル ニ オケル イデンテキ アルゴリズム ニ ヨル メンシンソウチ ノ サイテキ センタク ケイカク ソノ 2 チュウカンソウメンシン ノ バアイ

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Abstract

This study proposes an optimal selection method for base-isolation devices in a mid-story isolation structure using a genetic algorithm. Parameters employed in the genetic algorithm's evaluation functions are: A) eccentricity ratio, B) vertical load on each isolator, C) temporary load on each isolator, D) natural period, E) yield force coefficient of base isolation devices, F) the maximum response displacement of isolation devices, G) storey shear force coefficient and H) base isolation displacement. We employed three groups of parameters: (1). A-B-C-D-E, (2). A-B-C-E-F, (3). A-B-C-G-H. We did time history response analyses with buildings designed by the proposed method. As the result, the response value was suppressed in case of (3). Therefore, the proposed method is effective for selection isolation devices for mid-story isolation buildings.

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