论文部分内容阅读
为研究平面不规则空间钢网格盒式成束筒结构的抗震性能,采用MIDAS有限元软件建立数值模型,进行结构静力弹塑性分析.从结构塑性发展过程及其构件屈服的顺序,得出结构的屈服路径;根据结构内外筒剪力重分布特点,明确内外筒剪力的分配规律;从内外筒抗侧刚度的发展过程,寻求结构刚度退化的主要原因.分析连梁高度、外围钢网格柱截面、墙肢厚度等因素对结构的屈服路径、剪力分配规律、刚度退化的影响.分析结果表明:对于结构整体刚度和推覆极限荷载的影响程度为连梁高度较小,外围钢网格柱与墙肢厚度较大,墙肢厚度的影响略大于外围钢网格柱.
In order to study the seismic behavior of a steel mesh box beam tube structure with irregular plane space, a numerical model is established by MIDAS finite element software to analyze the static elastoplasticity of the structure. From the structural plastic development process and the yield order of the components, And the yielding path of the structure.According to the characteristics of the shear redistribution in the inner and outer cylinders, the distribution rules of the shear force inside and outside the cylinder were clarified.The main reason of the structural stiffness degradation was sought from the development of the anti-side stiffness of the inner and outer cylinders.Analysis of the relationship between the girder height, The influence of the factors such as the cross-section of the column, the thickness of the wall and other factors on the yield path, the shear distribution law and the stiffness degradation of the structure are analyzed.The results show that the influence on the ultimate stiffness of the structure and the ultimate load of nappe is that the height of the connecting beam is small, The thickness of the grid and wall limbs is larger, and the influence of the thickness of the wall limbs is slightly larger than that of the outer steel grids.