... EngineeringE-mail: tpnt20 02@ yahoo.com20(31)Chapter 9®¹i häcVí dụ 9.2Hệ sốđộng :22 222 4141dKαωω=⎛⎞ΩΩ−+⎜⎟⎝ 22 222 411, 5 28 3,73 4.1,5 .83 ,7311 42, 88 1 42, 88 dK⇒= =⎛⎞−+⎜⎟⎝⎠Ứng suất động trong dầmkhimôtơlàm việcQL /2 ... chạm.kQLLQL/2Mmaxmax 223 26txM QL QLbhWbhσ== =22 max23.0 ,2. 1,5.100,0 78( / )8. 12tkN cmσ==2max max. 25 ,3.0,0 78 1,97( / )ddtK kN cmσσ== =2max1,97( / )dkN cmσ=Tran Minh Tu – University of Civil EngineeringE-mail: ... 9®¹i häcVí dụ 9 .22 22max2 ,25 .3.10 0,5.3.101, 52. 0,76( / )4 .29 5,6 4 .29 5,6dkN cmσ=+ =2max0,76( / )dkN cmσ=Tran Minh Tu University of Civil EngineeringE-mail: tpnt20 02@ yahoo.com 22( 31)Chapter 9đại...