ST
IG
Augu August st
Gome Gome an Juli Juli Appl Applet eton on
Depa Depart rtme ment nt of Civi Civi Engi Engine neer erin ing, g, IST, IST, Tech Techni nica ca Univ Univer ersi sity ty of Lisb Lisbon on Lisb Lisbon on PORT PORTUG UGAL AL
ABSTRACT
This This pape pape pr sent sent
synt synthe he is of he stre streng ng heni hening ng de ig of rein reinfo forc rc
on re deta detail il fo this this type type of stre streng ngth then enin in
pr
ar also also pres presen ente ted. d.
oncr oncr te beam beam an nt d.
on
KEYWORDS
Stre Streng ngth then enin ing, g, rein reinfo forc rced ed conc concre rete te beam beams, s, desi design, gn, bend bendin ing, g, shea shear. r. INTRODUCTION
ru of th ch ra teri teri tics tics of th
ater ater al
alon alon he im ng that that incr increa ease se th acti action ons, s, such such as th seis seismi mi acti action on
on nd he ampl ampl fi atio atio
on of he oa capa capa it
Th desi design gn me hods hods nd ri er fo th bend bend ng nd sh ar stre streng ngth th ning ning of rein reinfo forc rc beam beam by exte extern rnal al rein reinfo forc rcem emen ents ts addi additi tion on ar pres presen ente te in this this pape paper. r. Th stru stru ture ture stre streng ng heni hening ng desi design gn must must be proc proc de by ru pi fo bj
he
he
elem elemen ents ts intr introd oduc ucti tion on or th stre streng ngth then enin in Th conc conc pt on
us be base base
stre streng ng
va
conc concre re
ss ss en of he exis existe tent nt he bu on
of th exis existe tent nt elem elemen ents ts
on th stru struct ctur ur
ss ssme ssment nt an
57
he obje obje tive tive
ch ev
ha
658
STRENGTHENIN
DESIGN CRITERIA
S(F):O;Rd load ri
effects,
th
ra
YIll
subscript
adequate.
I I I I I I I I I I I
M~I" 2M
(I)
=Y".R
-M -M 13/2
ross sections
659
monolithic
Yn.
Yn.
coefficient,
I.
. . . . . . . . . .
DESCRIPTIO
th
OF TH
Linear elasti
STRENGTHENIN
element.
co
J.
analysis(LEA
TECHENIQUE
ro
he tr ct es
ri
stre then ng
t,
exec ti
t s: O : 1 20 10 1
:0:40101
201m
t g : 0: 20 1 bs~SO
0101
bs
80 0101
epoxy_ plate
-= -
a) Withou
metallic anchor
steel plate
"I'"
b) With metallic anchor
Steel late epoxy resin :O:8
:O:3mm
mm
0 : mm
t g 0 : mm
t,
t,
a) Withou metallic anchor
b) With metalli anchor
lOoC, J.
conven en
ap lica on
66 steps: Concrete
surfac
poxy resi
BEAM
preparation;
inje tion
STRENGTHENIN
DESIGN
Bending
M,d, ,d 'Yn,M
'Yn,Y
0,9.
a)
£0
£'
d'
e'
If
rd
eq rd
eq
r:syd
f'syd
:Yd' (2)
cq
r;Yd
rd
yd
cq
r. syd
re
d'
d'
.<
fi
ll
-A'f'
d -
',d
(4)
d'
d -
min( t.m;",2
d~
(5)
MPa)
(7)
L/2
Ll2
U2 Gome
J.
(199 ).
J.
A.
a)
Shear
sd
r;ax
(8)
"2 rd
(10) wd
=Yn.vl·
~w
syd+;
9d
;w
r: SYd)
(11)
----------~4i~~~--
a)
lateral vie
b)
l a t er a l v i e w
bottom view
Fi re
COLUMN
STRENGTHENIN
fi
Sh
DESIGN
le
Yn,MN
665
(12)
me
re
DO gu
metallic
10
b)
c)
St
collar
(angle)
metallic
(angle)
collar
T r a ns v er s a
bea
Figure
It
.ii,
i' s tr en gt he ni n
metallic
s te e
p lJ t
collar
(angle)
metallic
<, ~.
steel
anchor
1,,/
CONCLUSIONS
detail
were presented.
REFERENCES C. Rodrigue Institut
(1993)
IT
Comportament
da ligaciio aco-resina-betii
em elemento
estruturais, Msc Dissertation,
Superior Tecnico, 1993
u ro co d
( 1 9 5) ,
ir
i st a EN
J . A lf ai at e ( 1 8 6) , Institut Superior Tecnico, 1986 J .A pp le to n A . G om e R e i st a P or t g ue s
Ms
( 1 9 7) , R ef or c s t r ut ur a d e b et d r ma d O I a di ci i n ge a a ri a d e s tr ut ur as , n ° 4 1 p g 1 5- 20 , J an ei r 1 9 7 . Strengthenin
y m o si u
reinforcement,
a o F ra nc is c
P re t r i
Strengthenin
an
1998-1-4 1995
U SA , A go st .
M ar c
99
1 99 5
d e a rm ad ur a
Dissertation,
e xt er io re s
of reinforced concrete beam by external reinforcement,
IABSE
c.
