Lat. Am. j. solids struct. vol.11 número6

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Intermediate flexural crack

IC debonding propagation

FRP reinforcement

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

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

Cross-section CFRP plates

tf = 1.4 mm t

240 mm mm f = 0.32%

CFRP plates

tf = 1.4 mm

480 mm mm f = 0.63%

380 500 500 500 500 500 500 500 500 380 CFRP plates Strain gauge 120 m Bottom view Elevation view 2000 mm 2000 mm LVDT 100

4800 mm 150 mm

150 100 mm Strain gauge

@ 500 mm

CFRP plates

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B-0.3-0.5 B-0.6-0.3

B-0.6-0.5

B-0.6-0.9

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   0 50 100 150 200 250 300

0 20 40 60 80 100 120 140 160 180 200

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

 



 

  

 

 

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

  

   

B-0.6-1 R

B-0.3-0

B-0.3-0.5 B-0.6-0.5

B-0.6-0.9 B-0.6-0

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0 50 100 150 200 250 300

0,0 1,0 2,0 3,0 4,0 5,0

A

p

lie

d

m

o

m

e

n

t

(kN

.m

)

Crack width (mm)

B-0.6-0.3 B-0.6-0

B-0.6-0.5

B-0.3-0 B-0.6-0.9

B-0.3-0.5

C B-0.6-1R

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0 1000 2000 3000 4000 5000 6000 7000

0 500 1000 1500 2000 2500

S train in CFR P rein fo rcem e n t (  )

Length along beam (mm) 0.1Mu 0.2Mu 0.3Mu 0.4Mu 0.5Mu 0.6Mu 0.7Mu 0.8Mu 0.9Mu Mu 0 1000 2000 3000 4000 5000 6000 7000

0 500 1000 1500 2000 2500

S train in CFR P rein fo rcem e n t (  )

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fu f f c fd t nE f _

 0.41 0.9

'   ' c f      0 50 100 150 200 250 300

0 2000 4000 6000 8000

A p p lie d m o m e n t (kN .m )

CFRP strain ()

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) ( ' ' ' d c β f A c β h ε A ψ c β d f A

M_u _s _s _f _f _fd  _s _s 

               2 2 2 1 1 1 ' s A ' s

f d'

      f f ct b c fd t nE f k k c α

ε  1

           max , max , b b b b f f ct b c fd l l l l t nE f k k c α

ε ₁ 2

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







  



  



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

 

f f

f fd

t nE

G

2 



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'

s

A

' d

'

c

f

'

s

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