RC雙筋設計 - 土木
By Sarah
at 2012-03-11T22:05
at 2012-03-11T22:05
Table of Contents
不好意思,不才因為學校讀書不認真
所以近來在板上問了許多蠢問題,懇請包容
目前暫時先準備土木普考
現在是想請問關於RC雙筋設計的問題
一般書上在做雙筋設計的時候 (鋼筋混凝土 (系統剖析) 蔡修毓著)
是先將 Md 0.005能承受的彎矩計算出來
再來計算剩下的彎矩 Mu/0.9-Md 0.005
共同配置上下兩層鋼筋來做補足As和As'的量
問題是之前看李文海老師的錄影帶 (教得真的很好!)
李文海老師在做雙筋設計的時候
是先算出最大鋼筋量時所承受的彎矩 Md 0.004
phi直接內插0.812出來做計算,其餘步驟同上
在這邊有兩個問題想請教大家
(1)
普考的時候,閱卷老師可能會疲倦,就只照標準答案改
可能過程就不會看太多
想請問以哪種方式作答比較保險呢?
(2)
Md 0.004 phi=0.812
有沒有可能在設計雙筋的時候,phi值會改變呢?
可能問的問題很基本,懇請大家見諒,謝謝!
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