0g=I(q28)2-(2/3)(q2/8)/2/EI=qP48EI() 或:0g={(q82(/3)1-(2/3)(qP2/8)/2}EI -qF3/48EI() 8 A M=1 B B A M=1,4B B M=1B = [(ql2 /8)l/2-(2/3) (ql2 /8) /2]/EI=-ql3 /48EI () 或： B = {[(ql2 /8)l/2](1/3)1-(2/3) (ql2 /8) /2}/EI =-ql3 /48EI ()