多铅芯橡胶隔震支座非线性力学性能试验研究及其显式有限元分析
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摘要
对应用于桥梁隔震的多铅芯橡胶支座进行非线性力学性能试验,并与理论计算结果进行对比分析。研究表明:多铅芯橡胶隔震支座性能稳定、受力性能良好、安装方便,是一种理想的桥梁隔震装置。在此基础上,采用显式有限元分析软件ANSYS/LS-DYNA分析多铅芯橡胶支座的非线性动态特性,建立铅芯橡胶支座的FEA(有限元)模型,针对支座中心加竖向荷载和水平向循环往复位移荷载,进行了数值模拟分析,其结果与试验曲线基本吻合,从而为确定多铅芯橡胶支座的动力分析参数提供计算方法,进而可为设计新型铅芯橡胶支座提供指导。
The mechanical property tests on multi-lead rubber bearings were conducted,the results were compared with theoretical calculation consequence.It is found that performance of multi-lead rubber bearings are steady,also with excellent working performance,convenience installation.They are ideal bridge isolated devices. Based on the study,the analysis of the nonlinear dynamic characteristics of multi-lead rubber bearings by using explicit finite element software ANSYS/LS-DYNA is presented.After create FEA model of representative samples,the lead-rubber bearing in a horizontal cyclic shear under a compressive axial load is simulated.The analytical results are compared with experimental results,and small difference is found.Thus,the proposed method can be applied to acquire the mechanical parameters of bearings,which are useful in design new bearings.
The mechanical property tests on multi-lead rubber bearings were conducted,the results were compared with theoretical calculation consequence.It is found that performance of multi-lead rubber bearings are steady,also with excellent working performance,convenience installation.They are ideal bridge isolated devices. Based on the study,the analysis of the nonlinear dynamic characteristics of multi-lead rubber bearings by using explicit finite element software ANSYS/LS-DYNA is presented.After create FEA model of representative samples,the lead-rubber bearing in a horizontal cyclic shear under a compressive axial load is simulated.The analytical results are compared with experimental results,and small difference is found.Thus,the proposed method can be applied to acquire the mechanical parameters of bearings,which are useful in design new bearings.
引文
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[11]张雄,陆明万.铅胶隔震支座的三维非线性动态特性分析[C].北京市振动工程学会学术会议论文集.北京,1996.Zhang Xiong,Lu Mingwan.Nonlinear dynamic analysis of lead-rubber bearing[C].Proceedings of Vibration Engineering,Beijing,1996.(in Chinese)
[2]GB50011-2001,建筑抗震设计规范[S].北京:建筑工业出版社,2001.GB50011-2001,Code for seismic design of building[S].Beijing:China Architecture Industry Press,2001.(in Chinese)
[3]杜修力,韩强,刘文光.方形多铅芯橡胶支座力学性能研究[J].地震工程与工程振动,2006,26(2):125―130.Du Xiuli,Han Qiang,Liu Wenguang.Mechanical behaviour of square multi-lead rubber bearing[J].Earthquake Engineering and Engineering Vibration,2006,26(2):125―130.(in Chinese)
[4]JG118-2000,建筑隔震橡胶支座[S].北京:建筑工业出版社,2000.JG118-2000,Rubber isolation bearings for buildings[S].Beijing:China Architecture Industry Press,2000.(in Chinese)
[5]林佳,刘文光,魏陆顺.橡胶隔震支座疲劳试验研究[J].广州大学学报(自然科学版),2005,4(3):258―260.Lin Jia,Liu Wenguang,Wei Lushun.Study on vertical repetition load fatigue test of rubber bearing[J].Journal of Guangzhou University(Natural Science Edition),2005,4(3):258―260.(in Chinese)
[6]吴彬,庄军生,臧晓秋.铅芯橡胶支座的非线性动态分析力学参数试验研究[J].工程力学,2004,21(5):144―149.Wu Bin,Zhuang Junsheng,Zang Xiaoqiu.Experimental study of mechanical parameters of lead bearing for nonlinear dynamic analysis[J].Engineering Mechanics,2004,21(5):144―149.(in Chinese)
[7]叶志雄,李黎,聂肃非.铅芯橡胶支座非线性动态特性的显式有限元分析[J].工程抗震与改造加固,2006,28(6):53―56.Ye Zhixiong,Li Li,Nie Sufei.Explicit finite element study of mechanical parameters of lead-rubber bearing for nonlinear dynamic analysis[J].Earthquake Resistant Engineering and Retrofitting,2006,28(6):53―56.(in Chinese)
[8]LS-DYNA user’s manual[M].Version960.Livermore,California:Livermore Software Technology Corporation,2001.
[9]郑明军,王文静,陈政南.橡胶Mooney-Rivlin模型力学性能常数的确定[J].橡胶工业,2003,50(8):462―465.Zheng Mingjun,Wang Wenjing,Chen Zhengnan.Determination for mechanical constants of rubber Mooney-Rivlin model[J].China Rubber Industry,2003,50(8):462―465.(in Chinese)
[10]臧晓秋.铅芯橡胶支座在桥梁隔震中的应用[D].北京:铁道科学研究院,1999.Zang Xiaoqiu.Study of isolated bridges with the lead-rubber bearing[D].Beijing:Academy of Railway Sciences,1999.(in Chinese)
[11]张雄,陆明万.铅胶隔震支座的三维非线性动态特性分析[C].北京市振动工程学会学术会议论文集.北京,1996.Zhang Xiong,Lu Mingwan.Nonlinear dynamic analysis of lead-rubber bearing[C].Proceedings of Vibration Engineering,Beijing,1996.(in Chinese)
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