... D1 =( 1 ,25 ữ 1,5) .d t 12 tTTFtVKKbg).(. 2 ).(max 2 21=+ 2 2max 2 21001888,0)30 120 (6,1.50 .2 25,0). 621 249() (2 )(mTTVKKFbg=+=+=0001888,0 .23 ,0.14,3 2 14,30 2 22 =+=+DDFDlDgChọn ... 9,8 m/s 2 Zt = 0,3 m/s 6,0=µ K = 28 13 ,3 Nm/s l15 22 0,3 2 vtPfgZFKµγ=KgZFftPv 2 2 0,3µγ= 22 2 327 2 0,35005,03 ,28 13.6,0.8,9 .2 3,0.)14,3.0188,0.(10.9 2 mmmKgZFftPv====−µγ ... võng tĩnh f t tô tải : fđ = 1.0 ft3 2, 11=TTtTsff)(5,9 92 21985 2 11KGGZaT===TTfZC=)(5,1757 2 3515 2 2 2 KGGZaT===- Câu trỡc fđt = 1,0 . 120 = 120 mm- Câu sau...