竖向质量分布对框架结构动力特性影响的研究  

Influence of vertically distributed masses on the dynamic properties of frame structure

作　　者：祝文畏[1] 杨学林[1] 岳燕玲[1] 

机构地区：[1]浙江省建筑设计研究院,浙江杭州310006

出　　处：《地震工程与工程振动》2011年第5期97-103,共7页Earthquake Engineering and Engineering Dynamics

摘　　要：在框架结构动力分析中,往往是把填充墙质量集中在楼层处进行求解。文中考虑填充墙实际分布对结构自振特性的影响,通过传递矩阵法求解结构自振频率和振型,并进一步分析了高阶频率的分布规律。结果表明,与采用集中质量模型的振型叠加法相比,填充墙的竖向质量分布会对框架结构高阶频率产生很大影响;框架结构的高阶模态具有局部性和密集分组的特性;同时,竖向质量分布不均匀所产生的失谐足以影响结构振型的整体性。The masses of infilled walls are always concentrated at floors in the dynamic analysis of infilled-frame structure.In this paper,we take into account the real mass distribution along the height of structures,the natural frequencies and modes are found by using the method of field transfer matrix.This paper also analyzes the distribution rule of high-order frequencies.It shows that,compared with the modal analysis,which used the lumped-mass distribution model,the mass distribution along the height of structures may influence the high-order modes.There is a dense high-order mode section and the high-order modes have the local characteristics in the frame structures.At the same time,the disorder caused by infilled walls can also intluence the integration of high-order modes.

关 键 词：高阶模态 局部模态 框架结构 动力特性 传递矩阵 

分 类 号：TU311.3[建筑科学—结构工程]