This study investigates the axial compressive strength of unstiffened slender webs in prismatic tapered steel members utilizing the newly proposed buckling coefficients raised in companion research. An experimental program is performed using three specimens that are axially loaded. A three-dimensional numerical finite element model is established considering both material and geometrical nonlinearities. The finite element model is successfully calibrated to simulate the experimental tests. New procedures are proposed to predict the web's effective width in the same AISC generalized effective width formula. The new procedures are validated against both the experimental results and the finite element models. The developed finite element models are used to expand the validation range of the proposed method to include wider ranges of geometrical variables of columns. The new procedures are found conservative for higher width-to-thickness ratios and tapering ratios. A correction factor is proposed to account for these conservative results and the corrected predictions are compared to both finite element and experimental results showing a better correlation.

本研究利用伴随研究中提出的新提出的屈曲系数来研究棱柱形锥形钢构件中未加筋细长腹板的轴向抗压强度。使用三个轴向加载的试样执行实验程序。建立了考虑材料非线性和几何非线性的三维数值有限元模型。有限元模型成功校准以模拟实验测试。提出了在相同的 AISC 广义有效宽度公式中预测幅材有效宽度的新程序。新程序根据实验结果和有限元模型进行了验证。开发的有限元模型用于扩展所提出方法的验证范围，以包括更广泛的柱几何变量。发现新程序对于更高的宽厚比和锥度比是保守的。提出了一个修正因子来解释这些保守的结果，并将修正后的预测与有限元和实验结果进行比较，显示出更好的相关性。