Vu = 1.5 ∑ Ai qi = ⋅ 1.5 * (B/2 − b/2 − d ) * L * ∑ qi = 1.5 * (1.9/2 − 0.4/2 − 0.33) * 1 * (60.71) = 38.25ton 38.25ton = 6.82ton/m2 = 0.068MPa 17m * 0.33m
u
=
u
= 0.068 MPa ≤
Ÿ
fc 0.85 21MPa = = 0.65 MPa OK! 6 6
Cortante Unidireccional en la dovela más esforzada:
[
]
Vu = 1.5 [q1 (Bdovela /2 − b/2 − d)]Ldovela = 1.5 9.78 ton/m 2 (1.9/2 − 0.2 − 0.33) ⋅ 1 m2 = 6.16 ton Vu 6.16 ton = = 18.67 ton/m2 = 0.19 MPa Ld 1 m × 0.33 m
u
=
u
= 0.19 MPa ≤
Ÿ
fc 0.85 21MPa = = 0.65 MPa 6 6
OK!
Cortante Unidireccional en B:
Del
diagrama
de
cortante,
se
tiene
que
la
cortante
máxima
es:
27.94 ton = 279400 N
Vu = 1.5 x 279400 N = 419100 N Vu 419100 N = = 0.66 MPa Bd 1900 mm × 330 mm
u
=
u
= 0.66 MPa ≤
fc 0.85 21MPa = = 0.65 MPa (NO!), La cercanía de valores 6 6
no amerita rediseñar. Ÿ
Momento en L (Acero transversal):
175