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4. vaja: DIMENZIONIRANJE BETONSKIH ELEMENTOV S ...

4. vaja: DIMENZIONIRANJE BETONSKIH ELEMENTOV S ...

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<strong>4.</strong> <strong>vaja</strong>: <strong>DIMENZIONIRANJE</strong> <strong>BETONSKIH</strong> <strong>ELEMENTOV</strong> S POMOČJO MODELOV Z RAZPORAMI IN VEZMI0,414 ma1N s = 254 kNN c = 754 kNa0θ 2 θ 3a12C12dC13da13Slika 10 Vozlišče 1.Geometrija omenjenega vozlišča je določena z naslednjimi merami( a cosθsinθ, a cosθsin ) 0,101cm,a0 = max1 2 2 1 3θ3=a 1= 0,206 cm,pri čemer dobimo vrednost a 1 = x iz analize prečnega prereza stebra,θ 2 = 50,4°, θ 3 = 67,1°,⎛ tanθ⎞2a12= a1⋅⎜⋅sin2+0⋅ cos2= 0,118 m,tan2tan⎟ θ a θ⎝ θ + θ3⎠⎛ tanθ⎞3a13 = a1⋅⎜⋅sin3+0⋅ cos3= 0,165 m.tan2tan⎟ θ a θ⎝ θ + θ3⎠Privzamemo, da je širina vozlišča enaka širini stebra b = 0,30 m. Tlačne napetosti soσσσ=N754 kN== 12,21MPa > f0,30 m ⋅ 0,206 mc1cdcs,effb ⋅ a1=C219,9 kN== 6,21MPa < f0,30 m ⋅ 0,118 m12d12cdcs,effb ⋅ a12C=+ C360,6 kN + 274,3 kN=0,30 m ⋅ 0,165 m= 12,82 MPa = f13d13' d13cdcs,effb ⋅ a13,,.~ 9 ~

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