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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。
In order to study the structural dynamic characteristics of the new cassette structure, a parametric analysis method was used to build a 21-layer structural model of the entire building through the use of large-scale finite element ANSYS software. Its vibration mode and fundamental frequency were analyzed. And height, the size of the column and the thickness of the shear wall and other parameters on the structure of the fundamental frequency. The results show that the quality and rigidity of the new box structure are uniform and reasonable, the horizontal displacement of the first mode is mainly horizontal X, the horizontal displacement of the second mode is mainly horizontal Y, and the third mode begins to reverse. The cycle ratio also meets the requirements of the high-level specifications. The main factors affecting the fundamental frequency are the size of the column, the height of the frame beam, the thickness of the skin plate, the thickness of the shear wall and the height of the interlayer beam. The influence of other factors on the fundamental frequency of the structure Relatively small.