矩形截面大偏心受压设计时,若As和As’都未知,则计算假设:

['A. A\ns = ρ\nminbh\n0', 'B. A\ns’ = ρ\nminbh\n0', 'C. A\ns = A\ns’', 'D. ξ = ξ\nb']


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