TIUIITm-cIIIIN Q图(kN)1 5 X1=121 20 M图(kNm)24 12×(16-12) 8-12 3m tgp =-0.5 4)(16-x) 16 8 =-26.5sing=-0447cos90=0894g M=M-Hy=20-6×3=2kNm H=6kN QD=QDco9-Hsin9=-1×0.894-6×(0447)=1.79kN N b=- Qp sin gp-Hcos9=-(-1)×(-0447)-6×0.894=-5.81N QD= Op cOS9-Hsin=-5×0.8946×(-0.447)=-1.79N Nb=- Qp sin-Hcos=-(-5)×(-0.447)6×0.894=-76kN 重复上述步骤,可求出各等分截面的内力,作出内力图。77 = −(−5)×(−0.447)−6×0.894=−7.6kN = −5×0.894−6×(−0.447)=−1.79kN = −(−1)×(−0.447)−6×0.894=−5.81kN = −1×0.894−6×(−0.447)=1.79kN N D QD sin H cos 0 =− − 右 右 QD QD cos H sin 0 = − 右 右 N D QD sin H cos 0 =− − 左 左 QD QD cos H sin 0 = − 左 左 7 1 5 Q°图(kN) + - M°图(kN.m) 20 24 D D 5 1 M M Hy 20 6 3 2kN.m 0 = − = − × = m 16 y 3 12×(16 12) = − = 26.5 sin = −0.447 cos =0.894 0 = − tg 0.5 8 8 12 = − − = xD=12m 重复上述步骤,可求出各等分截面的内力,作出内力图。 8 8 16 (16 ) ( ) x tg x x y x − = − = H=6kN