新型箱型软钢阻尼器耗能性能研究

RESEARCH ON ENERGY CONSUMPTION OF NEW BOX MILD STEEL DAMPER

针对H型软钢阻尼器,提出了利用Q235为材料制成的开孔箱型钢阻尼器。通过ABAUQS有限元软件研究了箱型软钢阻尼器腹板与竖直方向的角度大小对开孔箱型钢阻尼器的影响规律,结果表明,在腹板开孔率相同的情况下,箱型钢阻尼器屈服位移与H型钢阻尼器相同,滞回曲线比H型钢阻尼器饱满,随着腹板与竖直方向角度增大,箱型钢阻尼器的初始刚度、屈服力、屈服后刚度等值减小,但是均较H型钢阻尼器大;同时,由于腹板总宽度相同,箱型阻尼器两个腹板对于y轴的总惯性矩偏大,增强了阻尼器平面外的稳定性,腹板角度越大,平面外屈服力越大,稳定性越强。

Perforated box steel damper made of Q235 steel is proposed to replace H mild steel damper which has been launched to market. ABAUQS finite element software is used to research the influence law of the angle between web plate of box mild steel damper and vertical direction on perforated box steel damper. It is found that when their web perforation rate is same, yielding displacement of box steel damper is same as H steel damper and hysteretic curve is rounder than H steel damper; initial rigidity, yielding force and post-yielding rigidity of box steel damper reduce when the angle between web plate and vertical direction increases; meanwhile, due to the same total width of web plate, total inertia moment of the two web plates of box damper to Y axis is bigger, and this could improve the stability outside the damper plane. Larger web plate angle produces higher yielding force outside plane and better stability.