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poinconnement


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Bonsoir,

Je suis entrain de faire une verification sur le poinconnement du ballast de structure photovoltaique sur une dalle pleine de 10cm.

La reaction descendante defavorable sur le support (ballast en beton) de la structure metallique photovoltaique est 5KN.

ballast dimensions: (0.5x0.2)
Uo=2 (c1 +c2)= 2(0.5+0.2)=1.4m

(vEd 0) at the face of the column:

vEd 0 = β VEd /(u0d)=1 x 5/ (1.4*0.09)=40KN/m2
Design value of the maximum punching shear resistance (vRd.max)
vRd.max = 0.5 v fcd
Where
v = 0.6(1 – (fck / 250)) hence vRd.max = 0.3 fcd (1 – (fck / 250))=0.3*251.5.(1-25250)=4500KN/m2 >>40KN/m2

 

Est ce que c'est juste le calcul?

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