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28 已知一矩形 RC 梁斷面寬 40 cm、深 60 cm,採用 280 kgf/cm2 常重混凝土,以及 8 根降伏強度 4,200 kgf/cm2 的 D25 鋼筋(db=2.54 cm、Ab=
問題詳情
28 已知一矩形 RC 梁斷面寬 40 cm、深 60 cm,採用 280 kgf/cm2 常重混凝土,以及 8 根降伏強度 4,200 kgf/cm2 的 D25 鋼筋(db=2.54 cm、Ab=5.07 cm2),鋼筋有效深度為 52 cm。若此斷面開裂後的受壓深度為 22 cm,請問此時斷面的開裂慣性矩最接近下列何值?
(A) 236,560 cm4
(B) 336,560 cm
4
(C) 436,560 cm
4
(D) 536,560 cm
4
參考答案
上一篇 :
3. 如需拍攝圖(三)的失焦鏡頭(Focus Out),主要攝影機結構的操作重點是在何處? (A) a、c處(B) b、c處(C) a、b處(D) c、d處
下一篇 :
30 下列何者不是受撓構材中計算鋼筋伸展長度的臨界斷面?(A)最大應力處 (B)相鄰鋼筋終止處 (C)相鄰鋼筋彎起處 (D)梁中彎矩反曲點
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