摘要
基于系统化的集总数模型来表示土体的动力特性,建立土-消能减震结构相互作用体系的运动方程,采用复模态理论研究2个关键参数(土体剪切波速、结构高度与基础特征宽度的比值)对不同周期、不同阻尼比的减震结构动力特性的影响。研究表明:考虑土-结构相互作用后,非减震结构体系随着土体剪切波速的下降会加大整个体系的第一模态阻尼比;对于减震结构比,体系随着土体剪切波速的下降会削弱整个体系的阻尼比,且减震结构阻尼比越大,其削弱程度越明显。因此与普通结构相比,减震结构更需要考虑土-结构相互作用效应对其产生的不利影响。
The effects of soil-structure interaction（SSI） on dynamic characteristics of energy dissipating structures were investigated.Motion equations of soil-structure interaction energy dissipating structure were established with the soil dynamic characteristics described by systematic lumped-parameter model.Two parameters,such as soil shear wave velocity and the ratio of building height to foundation width,were used to investigate the effects on the dynamic characteristics energy dissipating structures under different periods and damping ratios by complex mode theory.It could concluded that,when SSI is considered,the first mode damping of structures without energy dissipation devices,increases when soil shear wave velocity decrease,while the contrary is the case for the structures with energy dissipation devices.Therefore,SSI had more effects on building with energy dissipation devices than building without devices.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2012年第5期1-6,共6页
Journal of Nanjing Tech University(Natural Science Edition)
基金
国家自然科学基金重大研究计划资助项目(90815017)
土木工程防灾国家重点实验室开放课题基金项目(SLDRCE10-MB-06)
关键词
土-结构相互作用
消能减震结构
动力特性
复模态理论
soil-structure interaction
energy dissipating structure
dynamic characteristics
complex mode theory
