新型盒式结构的振型和基频分析  

Modal and fundamental frequency analysis of a new box structure

作　　者：徐增茂 马克俭[1] 毕永辉[1] 才琪[1] XU Zengmao MA Kejian BI Yonghui CAI Qi(Space structure research center, Guizhou University, Guiyang 55000)

机构地区：[1]贵州大学空间结构研究中心,贵州贵阳550003

出　　处：《贵州大学学报（自然科学版）》2017年第4期86-92,共7页Journal of Guizhou University:Natural Sciences

基　　金："十二五"国家科技支撑计划(2011BAJ09B01-01);贵州省科技创新人才团队建设([2014]4012);贵州大学研究生创新基金资助(研理工2017062)

摘　　要：为研究新型盒式结构的结构动力特性,采用参数化分析方法,通过大型通用有限元ANSYS软件,建立21层的整栋楼结构模型,分析它的振型和基频,考察了上下肋的宽度和高度、柱子的尺寸和剪力墙的厚度等参数对结构基频的影响。分析结果表明,新型盒式结构上下质量和刚度均匀,受力合理,一阶振型以X向水平位移为主,二阶振型以Y向水平位移为主,三阶振型开始出现扭转,周期比也满足高层规范要求;影响基频的主要因素有柱子的尺寸、框架梁的高度、表层板的厚度、剪力墙的厚度和层间梁的高度;其他因素对结构基频的影响因素相对较小。To analyze the structural dynamic characteristics of the new box structure,the whole building of a 21-story structural model is established by means of parametric analysis method,which is based on large-scale general finite element ANSYS software. Inspect the influence of some factors on the structural fundamental frequency,which include the width and height of the column,the size of the column and the thickness of the shear wall.The results show that the quality of the new box structure and the stiffness is uniform,and the stress is reasonable.The first order mode is shifted by X level,the second order mode is shifted by Y,and the third order mode starts to twist and the cycle ratio also meet the high-level specification requirements; the main factors affecting the fundamental frequency are the size of the column,the height of the frame beam,the thickness of the surface plate,the thickness of the shear wall and the height of the interlayer beam,the other factors have relatively small influence on the fundamental frequency of the structure.

关 键 词：新型盒式结构 空腹夹层板 振型 基频 

分 类 号：TU311.3[建筑科学—结构工程]