鋼モルタル板を用いた座屈拘束ブレースの実験的研究:その4　芯材幅厚比と拘束力および断面ディテールの影響

摘要

座屈拘束プレースとは、軸方向力を伝達するプレース（以下、芯材 と呼ぶ）が座屈しないように拘束材を用いたものである。損傷制御構 造1）においては、座屈拘束プレースを履歴型ダンパーとして柱と梁か らなる主架橋に組込み、中地震から座屈拘束プレースを塑性化させる。 これにより、大地震を受けても、主架構の塑性歪は、大幅に低減され、 地震後の主架構の継続使用が可能となる。%The authors conceived buckling-restrained braces providing stable hysteretic characteristics even under high-strain-rate conditions. Based on a series of cyclic loading tests, a significant correlation between the brace's cumulative strain energy until the failure and restraining force was revealed. When the brace's cumulative strain energy is given as a design" condition, the buckling-restrained brace is designed using the proposed performance evaluation formula. In this paper, different specimens from what used in the past tests such as with different core plate width-to-thickness ratios and restraining forces, and with different unbonded material thicknesses and cross section details are fabricated and loaded. The strict scope of application for the performance evaluation formula proposed by the previous paper is defined by considering the test results.