直接强度法计算冷弯薄壁斜卷边槽钢轴压柱的承载力

AXIALLY LOADED CARRYING CAPACITY CALCULATION OF THIN-WALLED COLD-FORMED CHANNEL COLUMNS WITH INCLINED SIMPLE EDGE STIFFENERS BY DIRECT STRENGTH METHOD

通过计算得到了适合各种弯起角度的斜卷边槽形截面特性计算公式,方便了手算求解构件的屈曲应力。采用直接强度计算法对斜卷边槽钢轴压固支柱的稳定承载力及破坏模式进行了分析,并与已有的试验资料进行了对比。结果表明:直接强度法可以有效地预测斜卷边槽钢轴压固支构件的稳定承载力,从而说明了建立在简支试验结果基础上,经回归得到的直接强度法同样适用于固支柱稳定承载力的计算。

Section geometric properties of channels with different bending degrees of inclined simple edge stiffeners are gained by calculation. It is convenient for solving the buckling stress by hand. The test strengths and failure modes reported by an experimental reference of axially loaded fixed-ended channels with inclined simple edge stiffeners are compared with the strengths predicted using direct strength method. It is shown that direct strength method is valid for predicting the stability capacity of axially loaded fixed-ended channel columns with inclined simple edge stiffeners, consequently it is indicated that direct strength method which was developed based on the regression of pin-ended tests results is also applicable for calculating the stabihty capacity of fixed-ended columns.