【摘要】 提出了分析非同轴刚度偏心结构风振响应的基本框架。第一,建立了两层6个自由度(6DOFs)非同轴刚度偏心结构的动力方程。第二,将建立的动力方程扩展至多层(大于两层)非同轴刚度偏心结构情况。第三,基于顺风向、横风向及扭转风荷载功率谱,并考虑横风向与扭转风荷载间相关性及模态响应间耦合,建立了非同轴刚度偏心结构风致平-扭耦合响应的分析方法。最后,以15DOFs结构为例,通过设置结构不同刚度偏心,数值研究了非同轴刚度偏心对结构风致平-扭耦合响应的影响。更多还原

【Abstract】 A dynamic analysis framework of non-coaxial eccentric structures under wind loading was presented here.Firstly,the dynamic equations of a two-storey non-coaxial eccentric structure with 6-DOF were set up.Secondly,the dynamic equations of a multi-storey non-coaxial eccentric structure were obtained via extending those of a two-storey non-coaxial eccentric structure.Thirdly,based on the power spectra of wind forces in along-wind,across-wind,and torsional directions,considering both intermodal coupling of modal response components and statistical correlation between across-wind and torsional wind loading,the analysis methodology for wind-induced lateral-torsional coupled responses of structures with non-coaxial mass eccentricity was developed in frequency domain.Eventually,taking a structure with 15-DOF for example,the effects of non-coaxial stiffness eccentricity on its wind-induced lateral-torsional coupled responses were analyzed numerically through selecting different locations of stiffness eccentricity.更多还原