131371827 concreto pretensado y postensado

8/17/2019 131371827 Concreto Pretensado y Postensado

1/17

CONCRETO PRETENSA

POSTENSUNIVERSIDAD NACIONAL AUTONOMA DFACULTAD DE ARQUITECTU RA – SISTEM AS EST RUCT

BARCENAS FLORES


2/17

CONCRETO PRETENSADO.-

◦El horm!"# $r%&%#'()o %' *# m+&o)o )% ,o#'&r*,,",*(l lo' %l%m%#&o' %'&r*,&*r(l%' 'o# 'o#&%#,o#()(m%#&% ( %'*%ro' )% ,om$r%'"# $r%/$*%'&( %# '%r/,o0 %'&o ,o# %l 1# )% '*$%r(r l( )#(&*r(l )%l horm!"# r%#&% ( %'*%ro' )% &r(,,"#. C

%# ($l,(r %'*%ro' m%)(#&% ,(2l%' )% (,%ro 3&%#'()o' 4 '*5%&()o' (l horm!"#0 E'&( &+,#,( *% $($or E*!6#% Fr%4''#%& %# 789:.

◦Como m%#,o#(mo' (#&%rorm%#&% %l o25%&/o %' %l ()% l( r%''&%#,( ( &r(,,"# )%l ,o#,r%&o0 #&ro)*,%

%'*%ro )% ,om$r%'"# #&%r#o 3*% ,o#&r(rr%'&% %#


3/17

CONCRETO PRETENSADO.- DATOS ;ENERALES<

◦ P(&%#&()o %# 789: $or E*!6#% Fr%4''#%&

◦ M(4or C($(,)() )% ,(r!( )%2)o ( '* m+&o)o ,o#'&r*,&/o

◦ A*m%#&o )% r%''&%#,( )% &r(,,"# m%)(#&% l(#&ro)*,,"# )% *# %'*%ro ,om$r%'or #&%r#o

◦ S% %l(2or( %# =$l(#&('> %'$%,(l%'

◦ ;%#%r(lm%#&% %' *&l()o %# =$%('> o =2lo3*%'> 3*% '%mo#&(# %# '&o


4/17

CONCRETO PRETENSADO.- FABRICACION<

S* ,o#'&r*,,"# '% ll%/( ( ,(2o %# &(ll%' $(r(%l(2or(r $%('0 %'&% m+&o)o0 &%#% l( /%#&(5( )%3*% l(' $%(' $*%)%# $ro)*,r'% ,o# m*,hom(4or ,*)()o 4 *#orm)()0 ()%m?'0 %'%,o#"m,(m%#&% m(' (/or(2l% 3*% '*,o#'&r*,,"# %# %l '&o.

S%#)o m(' ?,l &(m2+# l( ,olo,(,"# )% %'&('$%(' %# l( ,o#'&r*,,"#0 ,o# *# m@#mo )%(#)(m(5%. Por %'&( r("# h( )o,o#')%r(2l%m%#&% %# (*m%#&o %# lo' l&mo'(o' l( *&l(,"# )% l(' $%(' $r% (2r,()(' )%horm!"#0 4 'o2r% &o)o %# l( ,o#'&r*,,"# )%%)1,o'.


5/17


COMPORTAMIENTO ESTRUCTURAL<

◦El orm!"# $r%&%#'()o *&l( l(,*(l)() )% %l ,o#,r%&o $(r( r%''&r*%r(' )% ,om$r%'"# '# %m2(r!o

%l ,o#,r%&o #o r%''&% *%r(' )%&%#'"# m*4 !r(#)%'0 %' $or %llo3*% '% l% (!r%!( %l (,%ro $(r( 3*%'o$or&% %'&% &$o )% %'*%ro'


6/17


TIPOS Y FORMAS DE USOS<

◦ El orm!"# $r%&%#'()o '% h( !%#%r(l()o %# ,(' &o)o' lo' ,(m$o' )%,o#'&r*,,"# ,o# %l m(4or +&o )%')% %l $*#&o )% /'&( &+,#,o 4 %,o#",%#&r( m(' )%&(ll()(m%#&% %# l( r%(l(,"# )% l(' $l(,(' 4 /!(' $r%(2'* *&l(,"# $(r( l( ,o#'&r*,,"# )% &%,ho'0 )#&%l%' )% $*%r&('0 /%#&(&%5()o'0 !(r(5%'0 ,%r,h('0 $o'&%' )% (l*m2r()o $*2l,o0 &orr%' $(r( ,(2l

&%#'"# 4 o&r(' ($l,(,o#%' 'ml(r%'.

◦ U&l()(' &(m2+# %# ,o#'&r*,,"# )% $*%#&%'0 %)1,o'0 ,(rr%&%r('0 ,o#h)r?*l,('0 &*2%r@(' )% horm!"# &r(/%'(' )% %rro,(rrl 4 $lo&%'


7/17


TIPOS Y FORMAS DE USOS<

Co#'&r*,,"# )%P*%#&%'

L(' &r(/%'(' )%l m%&ro )% l(l@#%( 79

Dr%#(5% Pro*


8/17


VENTAJAS<

◦ S% $*%)% %m$l%(r l( '%,,"# ,om$l%&()% horm!"#0 '% r%)*,% %l $%'o )% l(%'&r*,&*r(0 r%)*,,"# o %lm#(,"# )%l( 1'*r(,"#0 lo 3*% m%5or( l(m$%rm%(2l)() 4 )*r(2l)()0r%)*,,"# )%l m(#&%#m%#&o0r%)*,,"# )% l(' )%%o#%' &o&(l%'0m(4or r%''&%#,( ( l( (&!( 4 (lm$(,&o.

DESVENTAJAS<

◦ M(4or ,o'&o )% m(#o )%#,or()o'0 m(&%r(lm(4or ,(l)()0 '% r%3,o#&rol m?' %'&r,&o %#$l(#&(0 %'&%# $+r)%'*%ro )% &%'()o $or mo&/o'0 '% )%2%# /%r1%'&()o' )% )'%o0 '% r)'$o'&/o' %'$%,(l(#,l(5%.


9/17


EJEMPLOS<


10/17

CONCRETO POSTENSADO.-

◦El $r%%'*%ro o $o'&%#'()o %' *# %'&()o %'$%,(l )% %)%orm(,o#%' 3*% %' #)*,)o $(r( m%5or(r %l ,om$%'&r*,&*r(l )% *# %l%m%#&o.

◦Por m%)o )%l $r%%'*%ro '% (*m%#&( l( ,($(,)() )% ,

)'m#*4% l( '%,,"# )%l %l%m%#&o. S% I#)*,%# *%r(' o$*%'&($ro)*,%# l(' ,(r!(' )% &r(2(5o m%)(#&% ,(2l% )% (,%ro )% (l&( (l '%r &%#'()o ,o#&r( '*' (#,l('.

◦L( ($l,(,"# )% %'&(' *%r(' '% r%(l( )%'$*+' )%l r(!*()o,(2l%' )% (,%ro %#)*,&()o' $(r( %/&(r '* ()h%r%#,( ,o# %l ,o#


11/17

CONCRETO POSTENSADO.- DATOS ;ENERALES<

◦ S% )%#om#( horm!"# $o'&%#'()o o $o'&%'()o ( (3*%l horm!"# (l 3*% '% 'om)%l /%r&)o 4 r(!*()o0 ( %'*%ro' )% ,om$r%'"# $or m%)o )% (rm()*r(' (,&/(,%roH mo#&()(' )%#&ro )% /(#('.

◦ A )%r%#,( )%l horm!"# $r%&%#'()o0 %# %l 3*% l(' (rm()*r(' '% &%#'(horm!o#()o0 %# %l $o'&%#'()o l(' (rm()*r(' '% &%#'(# *#( /% 3*% %l

()3*r)o '* r%''&%#,( ,(r(,&%r@'&,(.

◦ L( /%#&(5( )%l $o'&%#'()o ,o#''&% %# ,om$rmr %l horm!"# (#&%' )% '* $*%'&)% mo)o 3*% l(' &r(,,o#%' 3*% ($(r%,%# (l )o2l(r l( $%( '% &r()*,%# %# *#( ,om$r%'"# $r%/(0 %/&(#)o %# m(4or o m%#or m%))( 3*% %l horm!"# &r(2(%'*%ro $(r( %l 3*% #o %' *# m(&%r(l ()%,*()o.


12/17

CONCRETO POSTENSADO.- FABRICACION<

◦ ;%#%r(lm%#&% '% ,olo,(# %# lo' mol)%' )% l(' /!(')*,&o' h*%,o' 3*% ,o#&%#%# ( lo' &%#)o#%' #o%'or()o'0 4 3*% '!*%# %l r*m2o )%'%()o0 (#&%' )%/(,(r %l ,o#,r%&o. Lo' &%#)o#%' $*%)%# '%r (l(m2r%'$(r(l%lo' (&()o' %# h(,%'0 ,(2l%' &or,)o' %# &oro#%'0 o/(rll(' )% (,%ro. El )*,&o '% (m(rr( ,o# (l(m2r%' (lr%*%ro (*l(r )% l( /!( G%'&r2o' '# r%or(rH $(r($r%/%#r '* )%'$l((m%#&o (,,)%#&(l0 4 l*%!o '% /(,@( %l,o#,r%&o. C*(#)o +'&% h( ()3*r)o '*1,%#&% r%''&%#,(0'% *'( l( /!( )% ,o#,r%&o m'm( $(r( $ro$or,o#(r l(r%(,,"# $(r( %l !(&o )% %'or()o.

S% *&l(# orm!o#%' )% (l&( r%''&%#,(0 %# !%#%r(l , K: MP( o '*$%ror0 3*% ()%m?' $o'%%# *# m")*lo )%%l('&,)() m(4or 3*% lo' horm!o#%' *'*(lm%#&%%m$l%()o' %# horm!"# (rm()o0 $or lo 3*% l(')%orm(,o#%' '%r?# m%#or%'.


13/17

CONCRETO POSTENSADO.- COMPORTAMIENTO ESTRUCTURAL<

L( &%#,o# '% %/(l( m)%#)o &(#&o l($r%'"# )%l !(&o ,omo l( %lo#!(,"# )%l(,%ro. lo' &%#)o#%' '% &%#'(##orm(lm%#&% &o)o' ( l( /% " 2%#*&l(#)o %l !(&o mo#o&or"#. Norm(lm%#&%'% r%ll%#%# )% mor&%ro lo' )*,&o' )% lo'&%#)o#%' )%'$*+' )% 3*% +'&o' h(# ')o

%'or()o'. S% or( %l mor&%ro (l #&%ror)%l )*,&o %# *#o )% lo' %&r%mo'0 ( (l&($r%'"#0 4 '% ,o#&#*( %l 2om2%o h('&( 3*%l( $('&( ($(r%,% %# %l o&ro %&r%mo )%l&*2o. C*(#)o '% %#)*r%,%0 l( $('&( *#% (l&%#)"# ,o# l( $(r%) #&%ror )%l )*,&o.


14/17

CONCRETO POSTENSADO.- TIPOS Y FORMAS DE USO<

◦ C%#&ro' Com%r,(l%'. - Com2#(,"# %1,%#&% )% $'o' )% %'&(,o#(m%#&o ,o# $'o' ,om%r,'(l(' )% ,#%.

- I#,l*'"# )% m%(##%' '# '(,r1,(r (l&*r(' !r(,(' ( l( %'2%l&% )%%#&r%$'o'.

◦ A*l(' $(r( E',*%l(' 4 U#/%r')()%'.

◦ A$ro/%,h(m%#&o )% (l&( %,o#om@( 3*% $%rm&% !r(#)%' ,l(ro'.

◦ A*)&oro' 4 C%#&ro' Com%r,(l%'.

◦ T%,h*m2r%' l!%r(' )% !r(#)%' ,l(ro' *&l(#)o ,*2%r&(' m%&?l,('


15/17

CONCRETO POSTENSADO.- VENTAJAS<

◦ R($)% %# l( ,o#'&r*,,"#

◦ R%)*,,"# )% lo' m(&%r(l%' )% ,o#'&r*,,"# h('&(*# :)% horm!"# 4 *# )% (,%ro

◦ R%#&(2l)() $or r%#)m%#&o %# l( o2r(

◦ E1,%#,( %# l( *&l(,"# )%l ,o#,r%&o.

◦ R%)*,,"# )% (,%ro )% r%*%ro ( ,(#&)()%'m@#m('.

◦ Al!%r(m%#&o )% l( %'&r*,&*r(

◦ M%#or $%'o )% %'&r*,&*r(.◦ M%#o' $%'o )% ,m%#&o'.

◦ D'm#*4% lo' %%,&o' )% ''mo.

◦ Pr%,'"# %# )'%o *&l(#)o %l =M+&o)o )%El%m%#&o F#&o

◦ Dm%#'o#(r l(' *%r(' r%(,&/(' )%l $r%'*%ro,o# !r(# $r%,'"#.

DESVENTAJAS<

◦ Co'&o

Precauciones:

Por '%r *# $ro,%'o r%(l()o %#m$or&(#&% $r%/%r l( (l&( )%

,oor)#(,"# %# %l &r(#'$or&% )%l%m%#&o'0 $*%)% %#,(r%,%r %S% )%2% $l(#%(r 4 mo#&or%(r,*)()o'(m%#&% %l $ro,%'o,o#'&r*,&/o0 'o2r% &o)o %# l(')%'mo#&(5% 4 ,ol()o' %# '&o.


16/17

CONCRETO POSTENSADO.- EJEMPLOS<


17/17

B2lo!r(1(<◦h&&$

131371827 concreto pretensado y postensado

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