This paper presents CCE(contrary calculation element)method and member end deformation incremental interaction equation,and computes 18 family beam-columns in-plane buckling ultimate loadsunder different load conditions.

• 采用“逆算单元长度法”,利用“杆端变形增量相关方程”,本文计算了十八族不同荷载作用下压弯构件面内失稳时的极限承载能力。