A.鋼筋達(dá)到屈服 B.鋼筋應(yīng)力突增 C.鋼筋應(yīng)力突增 D.混凝土到抗壓強(qiáng)
A.35mm B.40mm C.50mm D.55mm
A.100mm B.120mm C.140mm D.160mm