高层建筑刚架考虑轴变效应分析的递推法

The Recurrence Method for Analysis of High-Rise Building Rigid Frames Considering Axial Deformation Effects

In this paper, the recurrence method is applied to the analysis of internal forces and displacements of high-rise building rigid frames considering axial deformation. The principle of the method is as follows. First, the frame is divided into several single-layer frames. A recurrence formula linking the upper point quantity and lower point quantity in one layer is obtained according to the structural mechanics knowledge. Then, from the recurrence formula and the continuous conditions between two layers, equations linking the top point quantity and bottom point quantity in one frame are derived and solved to obtain the unknown bottom point quantity. Finally, using the recurrence formula and the bottom point quantity, we can calculate other layer point quantity successively from the bottom layer to the top layer. This method is not limited in geometric and physical parameters and load form, needs less computer capacity and is an accurate method which can easily be realized on microcomputers.