1. Carga de Viento (Prediseño)

CARGAS POR VIENTO  A) VELOCIDAD INSTANTÁNEA INSTANTÁNEA MÁXIMA DEL VIENTO La e#c"dad de d"se9# hasa 10 m de ara ser& adecada a a e#c"dad m&:"ma $ara a ,#(a de "cac";( de a ed"'"cac";(< $er# (# ser& me(#r a 21 m/s +5 km/hV = 22.2 m/s = 80 km / h  B) VELOCIDAD CORREGIDA CORREGIDA DEL VIENTO La e#c"dad "(sa(&(ea de "e(# se m"$"car& $#r ( c#e'"c"e(e de c#rrecc";(  >e de$e(de de a ara ? de as caracer!s"cas #$#%r&'"cas #$#%r&'"cas ?/# de ed"'"cac";( de e(#r(# +("e de e:$#s"c";( a "e(#-< de acerd# c#( a s"%"e(e aa. Las caracer!s"cas #$#%r&'"cas se re$are( e( 3 cae%#r!as) *Cae%#r!a A +s"( #srcc";(-) Ed"'"c"#s 're(e a mar< ,#(as rraes # es$ac"#s a"er#s s"( #s&c#s #$#%r&'"c#s. *Cae%#r!a @ +#srcc";( aa-) Ed"'"c"#s e( ,#(as sra(as c#( ed"'"cac";( de aa ara<  $r#med"# hasa hasa 10 m *Cae%#r!a C +,#(a ed"'"cada-) #(as ra(as c#( ed"'"c"#s de ara. Taa 1) C#e'"c"e(e de c#rrecc";(  S"( #srcc";( Osrcc";( aa #(a ed"'"cada Ara +m+Cae%#r!a A+Cae%#r!a @+Cae%#r!a C 0.1 0.84 0.8 10 1 0. 0.8 20 1.04 0.5 0.88 60 1.16 1.03 0.4 80 1.21 1.16 1.04 10 1.28 1.22 1.1 V = V :  =

1.8 m/s

C) CÁLCULO DE LA PRESIÓN DEL VIENTO Se c#(s"dera >e a acc";( de "e(# acBa c#m# $res";( s#re #s eeme(#s de 'achada. Para deerm"ar a res"se(c"a de eeme(# a em$e de "e(#< se esaece (a $res";( de c&c## P< c?# a#r se deerm"(ar& med"a(e a s"%"e(e e:$res";() P = +1/2- :  : V D 2 : Ce : C'  7#(de)

1 de 3

CARGAS POR VIENTO P) Pres";( de c&c# e:$resada e( Pa +N/mD2) 7e(s"dad de a"re e:$resada e( k%/m3 +e( %e(era se $ede ad#$ 1.2 k%/m3ce) C#e'"c"e(e de e(#r(# / ara Taa 2) C#e'"c"e(e de e(#r(# / ara Ce Ara eeme(# s#re ("e de se# e:er"#r +mE(#r(# de ed"'"c"# 3  10 20 30 0 Ce(r# de %ra(des c"dades 1.43 1.43 1.43 1.43 1.48 2.1 #(as ra(as 1.43 1.43 1.43 1.4 2.32 2.82 #(as rraes 1.43 1.43 1.8 2.62 2.5 3.20 Terre(# a"er# c#( #s&c#s 1.46 1.3 2.3 2.81 3.0 3.65 ce =

1.8

c') C#e'"c"e(e de '#rma Taa 3) 7eerm"(ac";( de 'ac#r de '#rma C'  C#(srcc";(

@ar#e(#

S$er'"c"es er"caes de ed"'"c"#s

S#ae(#

0.80

A((c"#s< mr#s a"sad#s< eeme(#s c#( (a d"me(s";( c#ra e( e se("d# de "e(# Ta(>es de a%a< ch"me(eas ? #r#s de secc";( c"rcar # e!$"ca Ta(>es de a%a< ch"me(eas ? #r#s de secc";( cadrada # reca(%ar  Arc#s ? c"eras c"!(dr"cas c#( ( &(%# de "(c"(ac";( >e (# e:ceda #s 6 S$er'"c"es "(c"(adasa 1 # me(#s S$er'"c"es "(c"(adasa e(re 1 a 40 S$er'"c"es "(c"(adasa e(re 40 ? a er"ca * E s"%(# +F- "(d"ca $res";( * E s"%(# +*- "(d"ca scc";( P = +1/2- :  : V D 2 : Ce : C' = 651.4 N/m2

c' =

1.0 0.50 2.00 0.80

*0.0

0<3 a 0

*0.40

0<3 a 0<5

*0.40

0.80

*0.40

@ar#e(# S#ae(# 0.80 *0.0

CLCHLO 7E LA PRESIN 7EL VIENTO SO@RE SECCIONES EJPHESTAS A(ch# @ar#e(# S#ae(# Eeme(# P +k%/m2- C##$. +m- P +k% / m- +k% / m- +k% / mV"%a Pr"(c"$a 68.05 1.20 5.486 64.1 *28.86 Car%as s#re a esrcra) 2 de 3

CARGAS POR VIENTO Car%as Perma(e(es Pes# de a Esrcra = Eer(" F C"e# ra,# =

Car%a V"a de K#(ae = 1 3 0

k%/m2 k%/m2 k%/m2

7= L=

3 de 3

40 86

k%/m k%/m

50

k%/m2