7/24/2019 Thuyet Minh Tinh Toan Khung Zamil-2

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zamil Yu cu : Thit k khung ngang ca nh my dt mt tng mt nhp, nhp nh

L(m), chi u ca! ct "(m), #$%c ca khung &' m, *t +iu + p + t-n, nh ./y d0ng 2ng gi3 c3 4tc (56nh 7h8c)9 Th p + +!;i c3 >?7a @A BC kt cDu

ca khung + ct +in kt kh%p %i m3ng +in kt ngm %i E$Fng ngang, ngang c3 B dGc mi i 9

L(m) "(m) &(m) Hi3 i

=I ,J 56nh 7h8c 1>K

A. thit k x g mIi. tI trng :

19 T6nh t i :MhNn @A # tE$%c . gC M1=, kh! ng cch giOa cc . gC thP! mQt #Rng n

=m9

Tn *t +iu mi SAn T i tENng tiu chu n " @G $ t t i T i tENng tUnh

T-n + p mi VHWm= 1> 191 11

X gC mi M1= VHWm= 1>,I 1,>J 1>, =

=9 "!;t t i :

7 tc ' Z> kHWm=, n ' 1,Z 7 tt ' Z>91,Z ' Z kHWm=9[T i tENng tc d\ng +n . gC :

4tc ' (1>9 >],Jc!@= ^ 1>,I) ^ Z>9 >],Jc!@

= ' >,_ (kgWm)9

4tt ' (119 >],Jc!@= ^ 1>, =) ^ Z 9 >],Jc!@

= ' 111,I= (kgWm)

ii. Tnh ton x g :

X t t i tENng tc d\ng +n . gC thP! h tE\c tNa B `.y c3tE\c !. t;! %i ph$Ang ngang mt g3c i ' J,]> (t c i'1>K)9

4. tc ' 4 tc9bin ' >,_9binJ,]> ' ,>1_ (kHWm)

4ytc ' 4 tc9M!@ ' >,_9M!@J,]> ' >,ZJ1 (kHWm)

4. tt ' 4 tt9bin ' 111,I=9binJ,] > ' 11,> (kHWm)

4ytt ' 4 tt9M!@ ' 111,I=9M!@J,]> ' 11>,_ (kHWm)

7/24/2019 Thuyet Minh Tinh Toan Khung Zamil-2

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19 Vi m tEa Bi u kin # n ca . gC :

tB ' . ^ y ' + 9