【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。更多还原

【Abstract】 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.更多还原