中间加劲复杂卷边槽钢纯弯构件弹性畸变屈曲应力计算方法研究

为了研究中间加劲复杂卷边槽钢纯弯构件弹性畸变屈曲应力简化计算方法,采用有限条分析软件CUFSM对不同参数的复杂卷边槽钢、∑形复杂卷边槽钢以及腹板V形加劲复杂卷边槽钢各70个构件的畸变屈曲应力进行数值分析.在此基础上,借鉴现有板件局部屈曲应力的表达方式,引入畸变屈曲系数,经拟合分析提出上述构件畸变屈曲应力的简化计算公式,并将复杂卷边槽钢和腹板V形加劲复杂卷边槽钢的公式进行合并,对公式的有效性进行验证.

A SIMPLIFIED FORMULA FOR CALCULATING THE ELASTIC DISTORTIONAL BUCKLING STRESS OF STEEL CHANNEL BENDING MEMBERS WITH COMPLEX EDGE STIFFENERS AND INTERMEDIATE STIFFENERS IN ELEMENTS

In order to research the simplified formulas of pure bending steel channels with complex edge stiffeners for their elastic distortional buckling stress, each 70 members for lipped channels with complex edge stiffeners, X style channels with complex edge stiffeners, and channels with complex edge stiffeners and intermediate V type stiffeners in the web were numerically analyzed by the finite strip software CUFSM. Based on the existing expression for local buckling and introducing distortional buckling coefficient, each of the suggested simplified formulas for distortional buckling stress of the above members were summarized. Besides, formulas for lipped channels with complex edge stiffeners and channels with complex edge stiffeners and intermediate V type stiffeners in the web were unified. All the formulas were confirmed for their availability.