53614(4) (c)4r==E 0 AcD (f)o=m(上侧受拉)4=2x(→) 648EI 7.44y=248mm 3E(→) 1080a 4y=180a+(c) CY = EI 53.67q ( ) (d) AB = 0 EI ql AB 3 7 3 = ( ) (e) EI ql CD 60 4 = (f) AF = EI 19.1 (上侧受拉) EI q BF 123 = ( → ) 5. EI pl f 648 23 3 max = ( ) 6. CY = 2EI 5 ( ) 7. AY = 24.8mm 8. EI EX 3 520 = ( → ) 9. CY = 180 h 1080 + ( ) 10. CY = tl ( )