村镇滑移隔震建筑瞬时摩擦耗能的参数敏感性分析  

Parameter sensitivity analysis of the instantaneous frictional energy dissipation for rural building structures supported on sliding base-isolation systems

作　　者：孙敏[1] 王锦燕[1] 孙光林 SUN Min;WANG Jinyan;SUN Guanglin(College of Architecture Engineering of Zhongyuan University of Technology, Zhengzhou 450007,China)

机构地区：[1]中原工学院建筑工程学院,郑州450007

出　　处：《世界地震工程》2020年第3期100-108,共9页World Earthquake Engineering

基　　金：河南省科技厅科技攻关项目(182102310755)。

摘　　要：给出了村镇滑移隔震建筑瞬时摩擦耗能的概念,并以此概念为响应指标。通过极差大小的对比,分析了该响应指标对刚度比、第二阶段刚度系数、隔震层屈服位移、隔震层摩擦系数、系统质量比和上部结构自振周期六个参数变化的敏感程度,阐述了上述系统参数对瞬时摩擦耗能这一响应指标的影响规律。研究表明:场地条件和地震动幅值大小对瞬时摩擦耗能均有显著影响;在所考虑的参数范围内,上部结构自振周期总是对瞬时摩擦耗能有较为显著的影响,摩擦系数对瞬时摩擦耗能的影响跟场地条件有关,Ⅰ类场地条件中摩擦系数对瞬时摩擦耗能影响不显著,而Ⅱ、Ⅲ和Ⅳ类场地条件中,摩擦系数对瞬时摩擦耗能的影响则非常显著;隔震层屈服位移、刚度比和第二阶段刚度系数总得来讲对瞬时摩擦耗能影响不显著,质量比对瞬时摩擦耗能影响居中。The concept of the instantaneous frictional energy dissipation for rural building structures supported on sliding base-isolated systems are put forward.With the instantaneous frictional energy dissipation as the only response index,the sensitivity analysis of the instantaneous frictional energy dissipation is carried out through the comparison of range size for the influential parameters,such as the stiffness ratio,post-yield stiffness coefficient,yield displacement of the isolation layer,friction coefficient,mass ratio and natural period of the superstructure.The study shows that the engineering site conditions and amplitudes of ground motions have significant effect on the instantaneous frictional energy dissipation,and the natural period of the superstructure exhibits a demonstrable effect on it in the whole parameter range of concern.The effect of friction coefficient on the instantaneous frictional energy dissipation is related to the engineering site conditions.The friction coefficient has significant effect on the instantaneous frictional energy dissipation in siteⅡ,ⅢandⅣconditions,while has little effect in site I condition.It is also found that the yield displacement of the isolation layer,the stiffness ratio,the post-yield stiffness coefficient have limited effect on the instantaneous frictional energy dissipation,while the mass ratio generally has certain effect.

关 键 词：村镇滑移隔震结构 瞬时摩擦耗能 敏感性 能量法 响应指标 

分 类 号：P315.08[天文地球—地震学]