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ID number:206431
 
Author:
Evaluation:
Published: 17.09.2009.
Language: Latvian
Level: College/University
Literature: n/a
References: Not used
Extract

4.GALVENĀS SIJAS APRĒĶINS
Galvenās sijas aprē inu veic kā nepārtrauktai 2 laidumu sijai, kas slogota ar koncentrētiem spēkiem - klājsiju
balstreakcijām. Klājsijas var tikt noslogotas dažādās kombinācijās ar vienmērīgi izkliedētu pastāvīgo un mainīgo
slodzi uz laukuma 5*2.5m2 .
a) koncentrētais spēks G no pastāvīgās slodzes, ievērojot sijas pašsvaru
dots: qp := 2.69 kPa bps := 0.17 m l2 := 5 γ n = 0.95 bgs := 0.25 m hpl := 0.06 m
m
γ bet = 25 kN/m3 hps := 0.4 m lf := 2.5 γ f = 1.1 hgs := 0.5 m
m
• plātnes un jumta konstrukcijas pasšsvars
Gpl := qp ⋅ γ n ⋅ l2 ⋅ lf Gpl = 31.944 kN
• palīgsijas balstreakcija no sijas pašsvara (kā vienlaiduma sijai)
( )
Gb := bps ⋅ hps − hpl ⋅ l2 ⋅ γ bet ⋅ γ f ⋅ γ n Gb = 7.55 kN
• galvenās sijas pasšsvars (2m garš posms)
Gg := bgs ⋅ hgs ⋅ lf ⋅ γ bet ⋅ γ f ⋅ γ n Gg = 8.164 kN
• G := Gpl + Gb + Gg G = 47.658
nosaka G kN
qpag := 1.12 kPa
b) pilnā mezgla slodze no pagaidu slodzes
P := qpag ⋅ l2 ⋅ lf P = 14 kN

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