αsmax=ξb(1-0.5ξb)=0.518(1-0.5×0.518)=0.3838
αs=M/(α1fcbh20)=160000000.00/(1.00×9.60×250×460.002)=0.315
由于αs≤αsmax 满足要求!
受拉钢筋截面面积As =1×9.6×250×{460-[4602-2×160×106/(1×9.6×250)]0.5}/360 =1201.59mm2
混凝土设计原理,清清楚楚。明明白白。课本才是王道