题目内容

设屋面梁的纵向受拉钢筋为3Φ8，按荷载标准组合下钢筋的应力σss=162N/mm2，则屋面梁的短期刚度Bs最接近______项数值。

A. 42555kN·m2
B. 49123kN·m2
C. 33125kN·m2
D. 55412kN·m2

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