抛物线外形软钢阻尼器试验研究
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摘要
提出一种新型的具有抛物线外形的软钢阻尼器,该阻尼器具有全长截面同时屈服的特点,可充分发挥软钢的材料功效。根据力学相关理论,推导出了该阻尼器的外形设计公式。按公式设计了软钢阻尼器,对两组阻尼器进行了拟静力试验,试验结果表明:具有抛物线外形的软钢阻尼器能有效地避免应力集中,具有稳定的滞回性能和良好的塑性变形能力,是一种理想的耗能元件。最后,用有限元软件分析了加载过程中的应变分布及滞回性能,结果与理论和试验研究相一致,为进一步优化阻尼器参数提供了合理的有限元模型。
This paper presents a new mild steel damper with parabolic shape,which has the characteristics of all the section yielding at the same time along the length direction.According to the related mechanics theory,the design formula was deduced.Quasi-static tests were conducted.The results show that the dampers possess the stable hysteretic capacity,sufficient plastic deformation capacity,and effectively avoid stress concentration phenomenon.The proposed damper is a kind of ideal energy dissipation component.Strain distribution and hysteretic capacity are studied by finite element software and the results agree with those obtained from theory and experimental research.
This paper presents a new mild steel damper with parabolic shape,which has the characteristics of all the section yielding at the same time along the length direction.According to the related mechanics theory,the design formula was deduced.Quasi-static tests were conducted.The results show that the dampers possess the stable hysteretic capacity,sufficient plastic deformation capacity,and effectively avoid stress concentration phenomenon.The proposed damper is a kind of ideal energy dissipation component.Strain distribution and hysteretic capacity are studied by finite element software and the results agree with those obtained from theory and experimental research.
引文
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[5]Wada1 Akira,Huang Yi-Hua,Iwata Mamoru.Passivedamping technology for buildings in Japan[J].Progressin Structural Engineering Materials,2000,2(3):335-350.
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[8]Kunisue Akihiro,Koshika Norihide,KurokawaYasushi,et al.Retrofitting method of existingreinforced concrete buildings using elasto-plastic steeldampers[C]//12th World Conference on EarthquakeEngineering.Auckland:IAEE,2000:648-655.
[9]Ghabraie Kazem,Chan Ricky,Huang Xiaodong,et al.Shape optimization of metallic yielding devices forpassive mitigation of seismic energy[J].EngineeringStructures,2010,32(8):2258-2267.
[10]吴斌,欧进萍.钢板屈服耗能器的薄膜效应分析[J].世界地震工程,1997,13(3):27-34.(WuBin,Ou Jinping.Analysis of membrane effects in steelplate yielding energy dissipators[J].World EarthquakeEngineering,1997,13(3):27-34.(in Chinese))
[2]吴斌,欧进萍.软钢屈服耗能器的疲劳性能和设计准则[J].世界地震工程,1996,12(4):8-14.(WuBin,Ou JinPing.Fatigue properties and design criteriaof mild steel yielding energy dissipators[J].WorldEarthquake Engineering,1996,12(4):8-14.(inChinese))
[3]张文元,李姝颖,李东伟.菱形开洞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):151-155.(Zhang Wenyuan,Lishuying,Li Dongwei.Simulation analysis on hystereticbehavior and vibration suppression of the mild steeldamper with the diamond-shaped opening and addeddamping and stiffness[J].World EarthquakeEngineering,2007,23(1):151-155.(in Chinese))
[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):66-74.(Li Gang,Li Hongnan.Study on vibration reduction of structurewith a new type of mild metallic dampers[J].Journalof Vibration and Shock,2006,25(3):66-74.(inChinese))
[5]Wada1 Akira,Huang Yi-Hua,Iwata Mamoru.Passivedamping technology for buildings in Japan[J].Progressin Structural Engineering Materials,2000,2(3):335-350.
[6]Chan R W K,Albermani Faris.Experimental study ofsteel slit damper for passive energy dissipation[J].Engineering Structures,2008,30(4):1058-1066.
[7]Kurokawa Yasushi,Sakamoto Mitsuo,YamadaToshikazu,et al.Seismic design of a tall building withenergy dissipation damper for the attenuation of torsionalvibration[J].The Structural Design of Tall Buildings,1998,7(1):21-32.
[8]Kunisue Akihiro,Koshika Norihide,KurokawaYasushi,et al.Retrofitting method of existingreinforced concrete buildings using elasto-plastic steeldampers[C]//12th World Conference on EarthquakeEngineering.Auckland:IAEE,2000:648-655.
[9]Ghabraie Kazem,Chan Ricky,Huang Xiaodong,et al.Shape optimization of metallic yielding devices forpassive mitigation of seismic energy[J].EngineeringStructures,2010,32(8):2258-2267.
[10]吴斌,欧进萍.钢板屈服耗能器的薄膜效应分析[J].世界地震工程,1997,13(3):27-34.(WuBin,Ou Jinping.Analysis of membrane effects in steelplate yielding energy dissipators[J].World EarthquakeEngineering,1997,13(3):27-34.(in Chinese))
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