新型箱型软钢阻尼器耗能性能研究
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摘要
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.
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.
引文
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[7]郑鹏,韩宝祥,王飞,等.屈曲约束支撑(UBB)体系技术特点分析及在抗震加固工程中的应用[J].建筑技术,2013,44(1):48-52.
[2]张文元,李姝颖,李东伟.菱形开孔软钢阻尼器及其在结构减震中的模拟分析[J].世界地震工程,2007,23(1):151-153.
[3]张文元,张敏政,李东伟.新型加劲软钢阻尼器性能与试验[J].哈尔滨工业大学学报,2008,40(12):1888-1891.
[4]李冀龙,欧进萍.X形和三角形钢板阻尼器的阻尼力模型(I)—基于双线性本构关系[J].世界地震工程,2004,20(1):10-15.
[5]王爽.新型开孔H型钢阻尼器参数分析与抗震性能研究[D].广州:广州大学,2012.
[6]龙晓鸿,李黎,唐家祥.I-型钢槽阻尼器的ANSYS仿真分析[J].华中科技大学学报(自然科学版),2002,30(8):79-80.
[7]郑鹏,韩宝祥,王飞,等.屈曲约束支撑(UBB)体系技术特点分析及在抗震加固工程中的应用[J].建筑技术,2013,44(1):48-52.
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