木質合板耐力壁の履歴特性に関する研究その2　正負繰り返し加力を考慮した履歴特性の解析的考察

摘要

Since Hanshin - Awaji (Kobe) Earthquake, a lot of those high ground level accelerations were observed in various regions in Japan when Niigata Chuetsu Earthquake, Niigata Chuetsu Coast Earthquake and Fukuoka West Coast Earthquake occurred. A present structure has the possibility of experiencing several earthquakes. And the structure is greatly damaged for resonance cyclic response after that the strength decrease of structure is caused.rnTherefore, cyclic loading tests of plywood bearing shear walls were conducted by authors. And through those cyclic loading tests, the strength decrease was occurred with cyclic deformation. And the change of strength decrease were approximated.rnIn this report, the analtical hysteric model with strength reduction is proposed. And the influence of the strength reduction was examined by analysis in one earthquake. As a result of analytical examinations that used 17 kinds of earthquakes, the response deformation has been increased around 20% more than the deformation of non considered model.%本研究では木質住宅の主要な耐力壁である構造用合板耐力壁の繰り返し変位経験による耐力低下が，応答変位に及ぼす影響を把握する基礎的考察を行った．1）耐力低下を考慮した復元力特性面材耐力壁の振幅に偏りのある正負漸増加力実験結果を模擬するに十分な精度を有した復元力特性を作成した．特に，層間変形角1/120rad．から1/60rad．では実験の累積エネルギー消費との誤差が10%程度であった．また，この変形角範囲は木質住宅の弾性限界状態から損傷限界状態までの範囲を再現出来ている．