... = - 2,34 Ni lc ti cỏc tit din: MI = 0; My = - 2,34ì0,759 = -1 ,776 Tm MII = MIII = - 2,34ì0,58 = -1 ,357 Tm MIV - 2,34x (-0 ,641)= 1,5 Tm NI = NII =NIII = NIV = QIV = 0,292x (- 2,34) = -0 ,683 T IV-IV ... TON KHUNG NGANG NH I- La chn kớch thc cu kin : 1- Kt cu mang lc mỏi 2- Chn dm cu trc 3- Xỏc nh kớch thc chiu cao nh 4- Xỏc nh kớch thc ct II- Xỏc nh ti trng tỏc dng : III- Xỏc nh ni lc : 1- Cỏc ... 2,673 -1 ,11 = 1,563 Tm MIV = 2,673 -0 ,308x10,45 = -0 ,546 Tm N1 = NII =0T NIII = NIV = 5,94 T QIV = -0 ,308 T IV-IV R Gd ed R=0,308T Gd=5,94T 1,563 II-II III-III 5,94 -1 ,11 + M b) Ct trc B: I-I ...