高力ボルト摩擦接合部の繰返し載荷実験を反映した履歴モデルによる検討 - 強度のばらつきを考慮した座屈拘束ブレースの接合部耐力要求値 その2 -

Abstract

Seismic response of the passive controlled structure using buckling-restrained braces (BRB) can be ensured when the BRB connection have sufficient strength. This paper investigates demand of connection strength considering hysteresis characteristics of high-strength bolt connections. Cyclic loading test are conducted to clarify hysteresis characteristics of connection including slip behavior under excessive bearing displacement, and the analytical model of connection is proposed from test results. By using the proposed analytical model, seismic response of steel frames with BRB dumpers are numerically analyzed and the strength of BRB bolt connections necessary to secure sufficient energy dissipation and dumping effect is suggested as connection factor.