【Daily Topic】【Civil Engineering Version 20160130】
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This post was last edited by hesonchang214 on 2016-1-30 at 18:45. Reward for participation: 2 wealth points. Reward for correct answer: 9 wealth. There are two beams with exactly the same cross-sectional dimensions and effective height; both use concrete of grade C20 along with HRB335 grade rebar. However, the reinforcement ratio in the mid-span section differs: it is 1.1% for Beam 1 and 2.2% for Beam 2. The ultimate bending moments of their normal sections are denoted as MU1 and MU2 respectively. Then, ( ) A. MU1 = MU2 B. MU2 > 2MU1 C. MU1 < MU2 < 2MU1 D. MU1 > MU2
There are two beams with exactly the same cross-sectional dimensions and effective height; both use concrete of grade C20 along with HRB335 grade rebar. However, the reinforcement ratio at the mid-span control section differs: it is 1.1% for Beam 1 and 2.2% for Beam 2. The ultimate bending moments of their normal sections are denoted as MU1 and MU2 respectively. Therefore, (C) A. MU1 = MU2 B. MU2 > 2MU1 C. MU1 < MU2 < 2MU1 D. MU1 > MU2
C.MU1＜MU2＜2MU1
C.MU1＜MU2＜2MU1
There are two beams with exactly the same cross-sectional dimensions and effective height; both use concrete of grade C20 along with HRB335 grade rebar. However, the reinforcement ratio at the mid-span control section differs: it is 1.1% for Beam 1 and 2.2% for Beam 2. The ultimate bending moments of their normal sections are denoted as MU1 and MU2 respectively. Therefore, (C) A. MU1 = MU2 B. MU2 > 2MU1 C. MU1 < MU2 < 2MU1 D. MU1 > MU2
C.MU1＜MU2＜2MU1