一种改进的拟粘滞摩擦阻尼器的试验研究与数值分析
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摘要
对一种改进的拟粘滞摩擦阻尼器进行了试验研究和数值分析。试验结果表明,与凸面拟粘滞摩擦阻尼器相比,改进的拟粘滞摩擦阻尼器的摩擦面由线接触改为面接触,疲劳性能显著改善,阻尼器的吨位也大大提高;与Pall型摩擦阻尼器相比,改进的拟粘滞摩擦阻尼器支撑内力明显降低,尤其是在大位移的情况下更为突出,这将有利于降低柱子的轴力,提高柱的延性。数值分析结果与试验结果吻合较好,说明基于几何非线性的数值分析方法是正确的。
Behavior of an improved pseudo-viscous frictional damper (IPVFD) was studied by testing and numerical analysis. It is shown by testing results that (1) comparing with the previous version of the dampers, the fatigue behavior of IPVFDs was improved markedly and tonnage of IPVFDs was increased greatly in virtue of some amendment on structure; (2) The internal force for support of IPVFDs was remarkablely smaller than that of Pall-type frictional dampers, and it was more conspicuous especially for larger displacement, that is beneficial to reduce the axial pressure of columns thus to improve ductility of columns. Results of the numerical analysis and testing were matched well, that can indicate correctness of this numerical analysis based on geometry nonlinearity.
Behavior of an improved pseudo-viscous frictional damper (IPVFD) was studied by testing and numerical analysis. It is shown by testing results that (1) comparing with the previous version of the dampers, the fatigue behavior of IPVFDs was improved markedly and tonnage of IPVFDs was increased greatly in virtue of some amendment on structure; (2) The internal force for support of IPVFDs was remarkablely smaller than that of Pall-type frictional dampers, and it was more conspicuous especially for larger displacement, that is beneficial to reduce the axial pressure of columns thus to improve ductility of columns. Results of the numerical analysis and testing were matched well, that can indicate correctness of this numerical analysis based on geometry nonlinearity.
引文
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[2] T T Soong, B F Spencer Jr. Supplemental energy dissipation: state-of-the-art and state-of-the-practice [J]. Engineering Structures, 24 (2002) : 243-259
[3] Pall A S and Marsh C. Response of Friction Damped Braced Frames [J]. Journal of the Structural Division, ASCE, 1982, 108 (ST6) : 1313-1323
[4] Pall A S, Pall R. Friction-Damper Used for Seismic Control of New and Existing Buildings in Canada [ J] . ATC 17-1, Seminar on Seismic Isolation, Passive Energy Dissipation, 1993, 2: 675-686
[5] 吴斌、欧进萍.拟粘滞摩擦耗能器的性能试验与分析[J].世界地震工程,1999,15(1) :1-12
[6] 吴斌、张纪刚、欧进萍.考虑几何非线性的Pall型摩擦阻尼器滞回特性分析[J].工程力学,2003,已录用
[7] 张纪刚.两种摩擦阻尼器抗震性能的数值分析与试验研究[D].哈尔滨工业大学,2002． 3
[8] 吴斌.滞变型耗能减振体系的试验、分析和设计方法[D].哈尔滨建筑大学,1998
[9] 龙驭球、包世华.结构力学教程[M].北京:高等教育出版社,1987,10-20
[10] 钟万勰、何穷、刘正兴.数值计算方法[M].北京:中国建筑工业出版社,1991
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