焊接工字形截面轴心受压柱,验算翼缘局部稳定不满足要求,可采取的合理措施是
A.将钢材由Q235改为Q345
B.增加翼缘厚度,宽度不变
C.增加翼缘宽度,厚度不变
D.利用翼缘的屈曲后强度
正确答案是B
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