【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。更多还原

【Abstract】 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-viscousfrictional 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.更多还原