初弯曲格构式轴压构件最大剪力的计算方法分析OA

In this paper,an expression for the maximum shear force of axially compressed members with initial bending failed with flexural buckling was derived firstly.Then,based on the extreme fiber yield criterion,a general formula for the maximum shear force was derived,and a formula of the maximum shear force,considering the equivalent initial eccentricity,was also proposed.A practical formula for the maximum shear force,which is overall conservative and applicable to nine structural steel grades in GB 50017-2017 and JGJ/T 483-2020,was obtained based on the formula for the maximum shear force considering the equivalent initial eccentricity,combined with experimental results from the literature.The results show that,in order to ensure the calculated value of the shear force of latticed axially compressed members is conservative,the classification of sections for latticed axial compression members failed with flexural buckling about the imaginary axis,required in the current standard"Standard for Design of Steel Structures"(GB 50017-2017),should be revised from Class b to Class c.Accordingly,the shear force of latticed axially compressed members should be determined by the proposed formula.The formulas provided in current national standards,such as GB 50017-2017,tend to be unsafe for determining the shear force of latticed axially compressed members.