摘要
为研究利用填充墙作为质量块的填充墙MTMD减震结构的减震性能,设计了不同阻尼器钢片厚度(频率比),不同质量块布置(质量比)的填充墙MTMD减震结构,以及无TMD的普通抗震框架结构,进行了不同地震输入水平下的振动台试验和动力时程分析。模态分析表明,填充墙减震结构各阶振型比普通框架结构的自振频率更小、周期更长,振动特性主要由第一阶平动效应控制。试验和时程分析得到了基本一致的减震规律,即减震结构在中、大震阶段具有显著的减震效果,地震作用越大,减震结构的加速度减震效果越好,由于阻尼器限位作用,位移减震效果变化不大;阻尼器钢片厚度决定主子结构频率比,频率比越接近1,减震效果越好;对于第一振型为主的多层结构,质量块布置数量对减震效果影响不明显,可考虑仅在顶层设置TMD质量块。
To study the damping performance of infilled wall MTMD vibration absorption structure, the experimental models with different thickness of sheet steel damper（frequency ratio） and different arrangement of TMD（mass ratio） are designed for shaking table tests and time-history analysis, as well as ordinary frame model. The modal analysis indicates that each mode period of vibration absorption structure is longer, and the vibration performance is controlled by the first horizontal vibration mode. The consistent regularities are obtained from tests and time history analysis, the remarkable vibration absorption effect could be acquired under moderate and major earthquakes. With the larger earthquake action, better acceleration absorption effect could be acquired, because of displacement constraint of damper, the change of damping effect on displacement is insignificantly. The thickness of sheet steel decides the frequency ratio of main structure and sub-structure , frequency ratio is closer to 1, better damping effect could be obtained. For muhilayer structure which the first vibration mode is the main mode, effect of TMD mass~ quantity is not obvious, so TMD mass could be only set on the top floor.
出处
《工程抗震与加固改造》
北大核心
2014年第4期87-94,99,共9页
Earthquake Resistant Engineering and Retrofitting
基金
国家自然科学基金项目(50868011)
关键词
填充墙MTMD减震结构
振动台试验
动力时程分析
频率比
质量比
infilled wall MTMD vibration absorption structure
shaking table test
dynamic time-history analysis
frequency ratio
mass ratio
