钢筋混凝土框架结构加层设计的模态分析  

Modal analysis of adding storey on the reinforced concrete frame structure

作　　者：滕尊莉[1] 张振宁[1] 

机构地区：[1]陇东学院土木工程学院,甘肃庆阳745000

出　　处：《中国建材科技》2016年第6期83-85,共3页China Building Materials Science & Technology

摘　　要：本文结合加层结构工程实例采用ANSYS有限元软件建立三维框架结构模型,研究混凝土加层和钢结构加层两种不同的加层方案。分别对原有框架结构、混凝土框架加层的整体结构、钢结构框架加层的整体结构进行模态分析,为选择合理的结构加层方案提供理论依据。分析结果表明:加层后的整体结构自振周期增加,第三振型的扭转变形大且影响到结构的使用;混凝土加层整体结构的周期和振型都大于钢结构加层的整体结构。说明钢结构加层方案比混凝土加层更加合理。In this paper, the ANSYS finite element software is used to establish the 3D frame structure model of the adding story structure,the adding layers of reinforced concrete and the adding layer of steel structure are studied. Modal analysis is used to the finite element modal of the original frame structure, the adding storey of the concrete structure.The theoretical basis is provided for the reasonable of the adding storey of the structure.The analysis results show that the natural period of vibration increase in the overall layers structure, large deformation occurred in the third torsional vibration and affect on the adding storey;The period of the whole structure of the concrete adding layer are larger than that of the whole structure of the steel structure.The adding layer of steel structure is more reasonable than that of reinforced concrete.

关 键 词：结构加层 自振周期 模态分析 振型 

分 类 号：TU2[建筑科学—建筑设计及理论]