تحليل مومسان مرتبه دوم قابهاي فولادي مستوي با خمش گرد محور ضعيف ستونها

Second Order Plastic Analysis of Steel Plane Frame Considering Weak-Axis Bending of Columns

A separated plastic strength surface is used for second order plastic analysis of frames under weak-axis bending effect of columns. This surface considers the interaction of axial force and bending in reduction of member stiffness. Also, two functions for reducing the stiffness are suggested. In order to show the ability of these functions, a variety of frames with weak-axis bending of columns are analyzed. These have been done by authorsʹ computer program. The results demonstrated that this plastic strength surface gives little error for weak-axis bending effect.