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工程力学  2014 

滚轴式金属屈服耗能阻尼器数值模拟研究

DOI: doi:10.6052/j.issn.1000-4750.2012.12.0968, PP. 110-116

Keywords: 桥梁结构,耗能构件,数值模拟,滚轴式阻尼器,耗能能力

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Abstract:

桥梁用阻尼器通常吨位和变形需求巨大,普通金属屈服耗能阻尼器难以满足其性能要求.为此该文提出一种新型的滚轴式金属屈服耗能阻尼器,并对其进行数值模拟研究.该阻尼器由一块平直耗能钢板及一组可转动辊轴组成,耗能钢板在辊轴之间穿过,受辊轴挤压产生塑性变形,从而耗散地震能量.该文采用在大型通用有限元软件ABAQUS建立了滚轴阻尼器的模型,通过该模型研究了辊轴个数以及辊轴间隙对阻尼器耗能性能的影响.分析结果表明:该阻尼器耗能性能受辊轴间隙和辊轴个数控制,通过合理的设计可以保证滚轴式金属屈服耗能阻尼器具备优良的变形能力和耗能能力.该文还提出了该阻尼器的恢复力计算公式,结合有限元仿真结果对计算公式进行了修正.

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