158666216-dimenzionisanje-krova
TRANSCRIPT
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8/18/2019 158666216-Dimenzionisanje-Krova
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PRORAČUN KROVNE KONSTRUKCIJE
krovni pokrivač : FALCOVANI CREP 30.000.65 0.5000.70 0.8660.50
usv. 35!"
# ana$i%a op&'r'('n)a pokrivač 0.56*a+čana op$a&a L$'&v' 0.,-
sop. &'. 0.,0 a = 0.70 m g = 0.78 krova
#sn'/ s = 0.70 osnov' L = 3.50 m#v'&ar w = 0.-5 krova gr = 5.00#kon!.si$a P = ,.00 kN
s&a&ički u&i!a)i
,.s$uča) op&'r'('n)a : -.08 kNm-.s$uča) op&'r'('n)a : ,.8 kNm
*i"'n%ionisan)'
/ra1a : č'&inari -. k$as' 2 ,.,5u/i4 : dop f = L / 200 = ,.75 cm
b = ,0.00 cm I = ,0.00
d d = ,-.00 cm W = -0.00
b 0.86 ,.,5,.38 cm < ,.75 cm
usv. RO 10/12
-.60 m
a = 0.80 m Lx = -.60 mb = ,.80 m Ly = 3.0 m
a b a
# ana$i%a op&'r'('n)a Lx
o* krovno/ pokrivača 0.0 osnov'
sop.&'. ron)ač' 0.0 osnov'sn'/ s = 0.70 osnov'
v'&ar 0.75 ron)ač'.6 kN/m-., kN/m
s&a&ički u&i!a)i
3.77 kNm
3.0 kNm
*i"'n%ionisan)' /ra1a : č'&inari -. k$as' 2 ,.,5u/i4 : dop f = L / 200 = ,.30 cm
na/i4 krova : α 2
&'. pokrivača g 2 kN / m2 sin α =
sn'/ S 2 kN / m2 cos α =
v'&ar W 2 kN / m2
1 . ROVNE LEVE
2 . ROOVI
g*cosα = kN / m2
kN / m2
b*d*g r /a*cosα = kN / m2
kN / m2
kN / m2
kN / m2 kN / m3
M= g*a*cosα ! s*a*cos2α ! w*a "*L/cosα "2 / # =
M= g*a*cosα *L/cosα "2 / # ! P*cosα * L/cosα "/$ =
σ md
= %&%' * %&0 = kN / cm2
cm4
cm3
σ m
= M / W = kN/cm2 < kN / cm2
f= '/(#$*)*L$ / I =
3 . RO9NA;E pripa*. +irina a 2
g = g roga
/ cos α = kN/m2
g r =
b * d * g r / a = kN/m2
kN/m2
w = wr * a / cos α = kN/m+
) x
= g!g r !s"*a*cosα !w =
) y
= g!g r !s"*a*sinα =
M x
= ) x* L
x2 / # =
M y
= ) y* L
y2 / # =
σ md
= %&%' * %&0 = kN / cm2
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8/18/2019 158666216-Dimenzionisanje-Krova
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b = ,.00 cm 778.67
d d = ,6.00 cm 57.33
3658.67
b 5--.67
,.-- ,.,5,.,6 cm < ,.30 cm
usv. RO9NA;A 14/16
# ana$i%a op&'r'('n)a
o* ron)ač' ,,.5 kN
*i"'n%ionisan)' /ra1a : č'&inari -. k$as' 2 77.50 P
b = ,.00 cmd d = ,.00 cm
, = ,6.00 cm
b 3-0,.33 Li = s)r- I / , " = .0 cm
5.78,.-0
7,.0- 3.0 m,.60 m,.85 m
usv. 14/14
usv. ,0,-
usv. ,-,0
usv. -?6,6
usv. ,0,-
usv. ,,6
I x = cm4
W x = cm3
I y = cm4
W y = cm3
σ m = M x / W x ! M y / W y = kN/cm2 < kN / cm2
f= '/(#$/*s)r-.) x*L
x$ / I
x "2! )
y*L
y$ / I
y "2 =
4 .
P = ) x *a =
σ cII d = %&%' * #'00 = N / cm2
I x = cm4
= Li / I =