根据英国规范,For axial forces applied concentrically to the baseplate, the thickness of the baseplate should be not less
than tp given by:
tp = c[3w/pyp]0.5,
If moments are applied to the baseplate by the column, the moments in the baseplate should be calculated
assuming a uniform pressure w0.6fcu under the effective portion of the compression zone and should not
exceed pypSp, where Sp is the plastic modulus of the baseplate.
计算底板厚t4
底板抗拉强度f1 235 N/mm^2
1.对于悬挑板
计算a1 =(B-b)/2 50
计算弯矩M1 =fc*a1^2/2 0.0 N-mm
计算板厚t =SQRT(6*M1/f1) 0.0 mm
2.对于三边支撑
计算a2 =(b-2t1-t3)/2 84 mm
计算b2 =(a-t2)/2 96 mm
计算b2/a2 =b2/a2 1.143
由b2/a2用插值法得q3 0.118
备注:查阅《钢结构设计手册》上册P499表10-5
计算弯矩M2 =q3*fc*a2^2 0.0 N-mm
计算板厚t =SQRT(6*M2/f1) 0.0 mm
4.计算加劲肋厚t3
肋板抗拉强度f2 210 N/mm^2
肋板抗剪强度f3 125 N/mm^2
1.抗剪计算
计算区格长 lRi =(A-t2)/2 171 mm
计算区格宽 aRi =(b-2t1-t3)/2 84 mm
计算肋高 hRi 200 mm
计算剪力 Vi =aRi*lRi*fc 0 N
计算板厚 t3 =Vi/(hRi*f3) 0.0 mm
2.抗弯计算
计算弯矩 M3 =aRi*fc*lRi^2/2 0 N-mm
计算板厚 t3 =M3/(6f2*hRi^2) 0.0 mm
3.抗压计算
计算压力 P3 =fc*lRi*aRi 0 N
计算板厚 t3 =P3/(f2*lRi) 0.0 mm