关键词: 钢框架, CDC法, 梁-柱, 相关方程

Abstract: This paper is intended to study a computation philosophy in the analysis of planar steel frames by CDC (Column Deflection Curve) method and increment interaction equations of beam-column (Ref. 4). As for the frame analysis, each beam-column is taken as an isolated member. According to boundary conditions of each member and compatibility deformation conditions of joint membeis, interaction equations of external load increment and deformation increment of a global structure are established. As a result, frame deflection configuration is determined. Finally, the rational value of load increment with interaction equations of external load increment and deformation increment is calculated. The whole analysis of structures can be substantially simplified. Therefore, the CDC method which calculates frames is an effective approach to the contradiction of calculating accuracy and speed.

Key words: steel frame, CDC method, beam-column, interaction equations