钢铅组合耗能器参数优选及减震效果
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摘要
利用电液伺服压剪试验机对钢铅组合耗能器(CSLD)进行拟静力试验,研究其力学性能;利用一个1∶4缩尺单层钢框架结构模型对CSLD进行地震模拟振动台试验,研究其耗能减震效果;试验结果表明:结构的层间位移和加速度反应明显减小,CSLD的滞回曲线饱满,确实能够很好地控制结构的地震反应。提出评价耗能器性能优劣的准则及两个附加条件,并利用遗传算法对CSLD的6个几何参数进行优选,结果表明优选效果良好,有利于耗能器的定型化和系列化。最后,利用ANSYS对安装有CSLD的20层钢结构Benchmark模型进行地震反应分析,分析结果表明CSLD对多高层结构同样具有良好的减震控制效果。
Pseudo-static tests of the combined steel lead damper (CSLD) were carried out for the study of mechanical properties of CSLD, using electro-hydraulic servo press-shear machine. Shaking table tests of a 1:4 scale one-story steel structure model with CSLD were conducted for the study of cushioning effect of CSLD. Test results indicate that the structure's inter-story displacement and acceleration responses are significantly reduced by the introduction of CSLD, which has full hysteresis loop and can control the structure's seismic responses. The criterion to evaluate the performance of the damper and two additional conditions were put forward and Genetic algorithm was used to optimize the six geometric parameters of CSLD according to the criterion. Optimization results demonstrate that Genetic algorithm can facilitate the standardization of CSLD. Finally, seismic response analyses of a benchmark model of 20-story steel structure fixed with CSLD were carried out. Results of analyses indicate that CSLD has favorable vibration control effect on multi-story structure.
Pseudo-static tests of the combined steel lead damper (CSLD) were carried out for the study of mechanical properties of CSLD, using electro-hydraulic servo press-shear machine. Shaking table tests of a 1:4 scale one-story steel structure model with CSLD were conducted for the study of cushioning effect of CSLD. Test results indicate that the structure's inter-story displacement and acceleration responses are significantly reduced by the introduction of CSLD, which has full hysteresis loop and can control the structure's seismic responses. The criterion to evaluate the performance of the damper and two additional conditions were put forward and Genetic algorithm was used to optimize the six geometric parameters of CSLD according to the criterion. Optimization results demonstrate that Genetic algorithm can facilitate the standardization of CSLD. Finally, seismic response analyses of a benchmark model of 20-story steel structure fixed with CSLD were carried out. Results of analyses indicate that CSLD has favorable vibration control effect on multi-story structure.
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]Kelly J M,Skinner R I,Heine A J.Mechanisms of energy absorption in special devices for use in earthquake resistant structures[J].Bulletin of New Zealand National Society for Earthquake Engineering,1972,5(3):63―88.
[4]Whittaker A S,Bertero V V,Thompson C L.Seismic testing of steel plate energy dissipation devices[J].Earthquake Spectra,1991,7(4):563―604.
[5]Kiyoshi Tanaka,Yasuhito Sasaki.Hysteretic performance of shear panel dampers of ultra low-yield-strength steel for seismic response control of building[C].New Zealand:12WCEE,2000.
[6]吴从晓,周云,王廷彦.金属耗能器的类型性能及工程应用[J].工程抗震与加固改造,2006,28(1):87―94.Wu Congxiao,Zhou Yun,Wang Tingyan.Types and performance of metallic dampers and their engineering applications[J].Earthquake Resistant Engineering and Retrofitting,2006,28(1):87―94.(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.两类铅阻尼器的滞回性能研究[J].世界地震工程,2005,21(1):134―139.Wang Tieying,Wang Yanwu,Wang Huanding.Research on hysteretic characteristics of two kinds of vertical lead dampers[J].World Information on Earthquake Engineering,2005,21(1):134―139.(in Chinese)
[9]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 Yangshang Experimental study of mechanical properties of steel-lead mixed dampers[J].Engineering Mechanics,2005,22(2):149―154.(in Chinese)
[10]辛亚军.新型钢铅组合耗能器的试验研究与理论分析[D].哈尔滨:哈尔滨工业大学,2005.Xin Yajun.Experimental study and theoretical analysis of new combined steel-lead damper[D].Harbin:Harbin Institute of Technology,2005.(in Chinese)
[11]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.Xin Yajun,Wang Huanding,Cheng Shuliang.Experimental study of new combined stell lead damper[J].Engineering Mechanics,2007,24(3):126―130.(in Chinese)
[12]李玉顺,刘瑞.软钢阻尼器的优化配置方法探讨[J].低温建筑技术,2006,3(111):45―47.Li Yushun,Liu Rui.Study on optimum arrangement method of hysteretic dampers[J].Low Temperature Architecture Technology,2006,3(111):45―47.(in Chinese)
[13]雷英杰,张善文,李续武.遗传算法工具箱及应用[M].西安:西安电子科技大学出版社,2005.Lei Yingjie,Zhang Shanwen,Li Xuwu.Genetic algorithm toolbox and its application[M].Xi’an:Xidian University Press,2005.(in Chinese)
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