圖示梁的EI=常數(shù),l=8m,已知中點(diǎn)C點(diǎn)受集中力P引起之豎向位移CD=6cm?,F(xiàn)欲使D點(diǎn)回到C點(diǎn),需使支座A沿逆時(shí)針方向轉(zhuǎn)動之角度值為()
A.0.02rad B.0.04rad C.0.05rad D.0.075rad