... bản( ) ( )( ) 1 3 1 3.4,48.9,05 1 0 ,14 9.0,398 14 ,02 ;8 (1 ) 8 1 0 ,14 9dp H ktR kNk+ += = =+ + 1 4 14 ,02.3,36 10 , 515 ;4,48hdR pR kNp= = = 14 ,02 10 , 515 19 ,679 21, 117 65,3 31 .gR kN= ... BTCT. .16 4,05 ,11 . 01, 06,0275 ,13 . 01, 05,0 01, 0 01, 05,0min=−−=−−=boRhlδ. 417 ,0 )16 4,0; 417 ,0max( )16 4,0;600250max();max(min====δδheoe→. 313 , 01, 0 1 417 ,0 1, 0 11 ,0=++=S78,727000 210 000===bsEEαLực ... = 13 ,6 21 + 4,02 = 17 ,641cm2.Is = (As + As’)(0,5h – a)2 = 17 ,6 41. (0,5.40 - 4)2 = 4 516 ,096cm4Tính ϕl theo công thức:.54 ,1 4,0.5,0 .17 ,5 817 8 ,10 24,0.5,0 .17 ,5 811 5,2 1 5,05,01...