折减抗弯刚度 q=625N/m 0.85E/3.6465×104Nm2 小小小小↓↓↓ A B 200·2.2=220 2.2m 器0.8m 2 0.8=0.533 378 023 378·2.2=555 (2 0.8=-0.4 2 0.8 200.0.8=53.3 0.8=0.6 DC 0.85EI (O1y1+02y2+03y3) (220533550.4+5330.6)=-2×103m=-0.2cm 3.6465折减抗弯刚度 0.85EI=3.6465 ×104Nm2 200 378 P=1 0.8 MP M ↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓ q=625N/m 2.2m 0.8m A B C ω1 y1 ω3 (220 0.533 555 0.4 53.3 0.6) 2 10 m 0.2cm 3.6465 1 3 =  −  +  =−  =− − y3 ω2 y2 200 2.2 220 2 1 w1 =  = 0.8 0.533 3 2 y1 = = ( ) 0.85 1 1 1 2 2 3 3 y y y EI DC = w +w +w 378 2.2 555 3 2 w2 =  = 0.8 0.4 2 1 y2 = − = − 200 0.8 53.3 3 1 w3 =  = 0.8 0.6 4 3 y3 = =