串联基础隔震结构的隔震特性  

Characteristics of series-base-isolation structures

作　　者：张富有[1] 魏良甲[1] 

机构地区：[1]河海大学土木工程学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2007年第3期315-318,共4页Journal of Hohai University(Natural Sciences)

摘　　要：由橡胶隔震支座与摩擦滑移隔震支座串联成组合支座,再与橡胶隔震支座并联形成的串联基础隔震结构,在地震时可以取得较好的隔震效果.根据串联基础隔震结构的特点,给出了该种隔震体系的等效阻尼、等效刚度的计算公式;将串联隔震支座设定为多个屈服剪力水平,得到了较好的等效阻尼.实例计算表明,选择合适的摩擦系数和2种支座的刚度比,可以得到性能较好的隔震结构.The series-base-isolation structure, with a composite beating formed by serial connection of the rubber isolation beating with friction-sliding isolation bearing and connected with the rubber isolation bearing in parallel form, obtains good effect of vibration isolation under earthquakes. According to the characteristics of the series-base-isolation structure, the calculation formulas for the equivalent damp and equivalent stiffness of the structure were given, and the desirable equivalent damp could be obtained by rational design of multi-level yield shear stress of composite beatings. Case study shows that rational determination of the friction coefficient and the stiffness ratio of these two kinds of beatings is helpful to obtain good effect of vibration isolation.

关 键 词：串联基础隔震结构 橡胶垫 等效阻尼 

分 类 号：TU352.1[建筑科学—结构工程]