一种钢铅组合耗能器的滞回模型和减震效果研究
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摘要
该文在工字型钢铅组合耗能器试验的基础上,建立其滞回模型,并对安装耗能器的减震结构进行数值仿真,研究这种耗能器的滞回性能和减震效果。首先建立了耗能器的有限元分析模型,在有限元模型能够准确描述耗能器力学性能的前提下,利用均匀设计法对耗能器的主要几何参数进行设计,并进行数值回归计算,得到了耗能器的双线性滞回模型屈服强度、弹性刚度、强化刚度等力学性能与几何参数之间的关系。建议的滞回模型形式简单,便于工程应用,且与试验结果接近,表明模型参数公式合理;最后,建立钢铅组合耗能器减震体系的仿真模型,进行地震反应分析,结果表明:钢铅组合耗能器有良好的减震控制效果。
Based on the experimental results of I section combined steel-lead dampers (CSLD), the hysteretic model of I section CSLD is proposed and the seismic responses of the structure with CSLD are simulated to study the hysteretic performance and the control effect. Firstly, the finite element model is proposed. With the help of finite element analysis, the geometrical parameters of CSLD are designed by Uniform Design method. Then the bilinear hysteretic model of the CSLD is proposed, whose characteristic parameters are yield strength, elastic rigidity and stiffened rigidity. A regression analysis yields the equation relating the characteristic parameters of the model and the geometric parameters of the damper. The proposed model is simple and can be conveniently applied for practical purposes. The model agrees well with the experimental results, indicating the equation of characteristic parameters is reasonable. Finally, a simulation is conducted to examine the seismic responses of CSLD vibration control system. The simulation results show that the CSLD has favorable vibration control effect.
Based on the experimental results of I section combined steel-lead dampers (CSLD), the hysteretic model of I section CSLD is proposed and the seismic responses of the structure with CSLD are simulated to study the hysteretic performance and the control effect. Firstly, the finite element model is proposed. With the help of finite element analysis, the geometrical parameters of CSLD are designed by Uniform Design method. Then the bilinear hysteretic model of the CSLD is proposed, whose characteristic parameters are yield strength, elastic rigidity and stiffened rigidity. A regression analysis yields the equation relating the characteristic parameters of the model and the geometric parameters of the damper. The proposed model is simple and can be conveniently applied for practical purposes. The model agrees well with the experimental results, indicating the equation of characteristic parameters is reasonable. Finally, a simulation is conducted to examine the seismic responses of CSLD vibration control system. The simulation results show that the CSLD has favorable vibration control effect.
引文
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[2]Soong T T,Dargush G F.Passive energy dissipation systems in structural engineering[M].New York:John Wiley&Sons,1997.
[3]Chan Ricky W K,Albermani Faris.Experimental study of steel slit damper for passive energy dissipation[J].Engineering Structures,2008,30(4):1058―1066.
[4]李钢,李宏男.新型软钢阻尼器的减震性能研究[J].振动与冲击,2006,25(3):66―72.Li Gang,Li Hongnan.Study on vibration reduction of structure with a new type of mild metallic dampers[J].Journal of Vibration and Shock,2006,25(3):66―72.(in Chinese)
[5]卢智成,曹万林.内藏X形软钢板铅复合耗能器的力学性能及减震分析[J].世界地震工程,2006,22(4):13―17.Lu Zhicheng,Cao Wanlin.Analysis on mechanic properties of compound damper with concealed X type mild steel lead and seismic reduction[J].World Earthquake Engineering,2006,22(4):13―17.(in Chinese)
[6]李玉顺,大井谦一,沈士钊.钢框架结构软钢阻尼器振动控制的试验及理论研究[J].建筑结构学报,2004,25(2):1―7.Li Yushun,Kenichi Oni,Shen Shizhao.Experimental and theoretical study on vibration control of steel frame attached with hysteretic dampers[J].Journal of Building Structures,2004,25(2):1―7.(in Chinese)
[7]王艳武,王铁英,王焕定.两类铅阻尼器的试验研究[J].地震工程与工程振动,2004,24(1):166―171.Wang Yanwu,Wang Tieying,Wang Huanding.Experimental research on two kinds of lead dampers[J].Earthquake Engineering and Engineering Vibration,2004,24(1):166―171.(in Chinese)
[8]王铁英,王艳武,王焕定,张永山.钢铅组合耗能器力学性能试验研究[J].工程力学,2005,22(2):149―154.Wang Tieying,Wang Yanwu,Wang Huanding,Zhang Yongshan.Experimental study of mechanical properties of steel-lead mixed dampers[J].Engineering Mechanics,2005,22(2):149―154.(in Chinese)
[9]辛亚军,王焕定,程树良.新型钢铅组合耗能器试验研究[J].工程力学,2007,24(3):126―130,109.Xin Yajun,Wang Huanding,Cheng Shuliang.Experimental study of new combined steel lead damper[J].Engineering Mechanics,2007,24(3):126―130,109.(in Chinese)
[10]方开泰.均匀设计与均匀设计表[M].北京:科学出版社,1994.Fang Kaitai.Uniform design and uniform design table[M].Beijing:Science Press,1994.(in Chinese)
[11]周福霖.工程结构减震控制[M].北京:地震出版社,1997:60―63.Zhou Fulin.Engineering structures vibration control[M].Beijing:Seismic Press,1997:60―63.(in Chinese)
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