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目前,国内高层框架计算程序中的杆件单元刚度矩阵,按平面考虑时,一般为两种情况:一种是不考虑轴向变形的4×4阶矩阵,另一种是考虑轴向变形的6×6阶矩阵。根据实践计算证明,高层框架杆件的轴向变形对内力的影响是不容忽视的。在考虑这种影响时,现有计算程序存在这样的问题:程序中的荷载都是一次加载的,这对以风载或地震荷载为主的水平荷载来说,是符合实际情况的,但对于以恒载为主的垂直荷载来说,显然是不符合加载情况的。所有恒载并非在整体框架形成后,再突然一次加载于框架上,而是根据施工进程,逐层加载于框架上。对于框架本身,其整体也并非一次形成,也是根据施工进程,逐步形成一
At present, when the rod element stiffness matrix in the domestic high-level framework calculation program is considered in terms of planes, it is generally in two cases: one is a 4×4 matrix without axial deformation, and the other is considering axial deformation. 6×6 matrix. According to practical calculations, the effect of axial deformation of high-rise frame members on internal forces cannot be ignored. When considering this effect, the existing calculation program has such a problem: the loads in the program are all loaded at once. This is true for horizontal loads based on wind load or seismic load, but for For a vertical load dominated by a constant load, it is obviously not consistent with the loading conditions. All dead loads are not suddenly loaded on the frame after the overall framework is formed, but are loaded on the frame layer by layer according to the construction process. For the framework itself, the whole is not formed once, and it is gradually formed according to the construction process.