拟黏滞摩擦阻尼器滞回特性及支撑内力分析
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摘要
从Pall型摩擦阻尼器四连杆机构的几何非线性变形特征出发,分析框架位移、支撑刚度、阻尼器摩擦力、阻尼器大小、支撑倾角、支撑屈曲力等对一种新型摩擦阻尼器——拟黏滞摩擦阻尼器的滞回特性及支撑受力特点的影响。分析结果表明拟黏滞摩擦阻尼器除了保留了Pall型摩擦阻尼器恢复力特性不受支撑屈曲力影响的优点外,支撑内力还比Pall型摩擦阻尼器明显降低,这将有利于提高框架柱的延性,减小框架柱在地震下的损伤。同时还拟合出可供设计人员使用的实用支撑最大内力计算公式。
Based on the geometry nonlinearity of four-link mechanism of Pall-typed frictional damper (PFD) , the influence of frame displacement, brace stiffness, damper slip force, damper size, brace obliquity and buckling force of brace on the hysteretic behavior and the brace force of a novel frictional damper--pseudo-viscous
frictional damper (PVFD) is analyzed. The analysis results show that PVFDs retain an advantage of PFDs, which is that the hysteretic characteristics are not influenced by the buckling force of braces. Furthermore, the tension force of the brace of PVFD is remarkably smaller than that of PFD, which is beneficial for frame columns to improve its ductility. Finally, a regression formula of brace maximum force is presented.
Based on the geometry nonlinearity of four-link mechanism of Pall-typed frictional damper (PFD) , the influence of frame displacement, brace stiffness, damper slip force, damper size, brace obliquity and buckling force of brace on the hysteretic behavior and the brace force of a novel frictional damper--pseudo-viscous
frictional damper (PVFD) is analyzed. The analysis results show that PVFDs retain an advantage of PFDs, which is that the hysteretic characteristics are not influenced by the buckling force of braces. Furthermore, the tension force of the brace of PVFD is remarkably smaller than that of PFD, which is beneficial for frame columns to improve its ductility. Finally, a regression formula of brace maximum force is presented.
引文
[1] KELLY J M, SKINNER R I, HEINE A J. Mechanisms of energy absorption in special devices for use in earthquake-resistant structures[J].National Society for Earthquake Engineering, 1972,5(3) :63-88．
[2] SOONG T T, SPENCER Jr B F. Supplemental energy dissipation: state-of-the-art and state-of-the-practice[J].Engineering Structures,2002,24(3) :243-259．
[3] 吴斌,张纪刚.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,2003,20(1) :21-26．
[4] 吴斌,欧进萍.拟黏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．
[5] 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:哈尔滨工业大学,2002．
[6] 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．
[2] SOONG T T, SPENCER Jr B F. Supplemental energy dissipation: state-of-the-art and state-of-the-practice[J].Engineering Structures,2002,24(3) :243-259．
[3] 吴斌,张纪刚.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,2003,20(1) :21-26．
[4] 吴斌,欧进萍.拟黏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．
[5] 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:哈尔滨工业大学,2002．
[6] 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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