【单选题】4 已知某一钢筋混凝土单筋矩形截面简支梁,梁的截面尺寸 b × h = 250mm×500mm ,承受弯矩设计值 M =151.65kN · m ,混凝土强度等级为 C25 ( f c =11.9N/mm 2 , f t =1.27N/mm 2 ),钢筋采用 HRB335 ( f y =300N/mm 2 , ξ b =0.550 ) , 环境类别为一类。(提示: h 0 =460mm ) ( 1...
【单选题】The () of the semi-built method of the construction crankshaft is that by making the two webs and crankpin from a single forging the grain flow in the steel follows the web round into the crankpin and...