1

Experimental investigation on the shear transfer between

concrete interfaces of Slab-and-Beam Bridge Deck Structures

. 1, . 2

: , , , , ,

: - . 11 . - ( ) . . , CEB, 2 DIN-Fachbericht 102. ABSTRACT : In the present study the shear transfer between concrete interfaces of slab-and-beam bridge deck structures is investigated. The shear resistance of these concrete interfaces results as the resultant of the concrete-to concrete friction and the dowels action. The study includes the experimental investigation of 11 specimens under cyclic load. The experimental shear resistance of the studied concrete interfaces is compared with the shear resistance as it is calculated according to the equations which provide CEB, Eurocode 2 and DIN-Fachbericht 102.

1 ..., MSc., email: stegou@civil.auth.gr 2 , , , , email: itegos@metesysm.gr

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2

. , , , . , , , 10 12. . , . , , . , ( . ., 2008), . , (Choi D.U. et al., 1999), (Jlio E. et al., 2004). , (Mattock ., 1969), (Loov R.E. and Patnaik K.A., 1994). - , 1. . . . . , CEB, (CEB-FIB, 1991), 2, (CEN, 2003) DIN-Fachbericht 102, (Deutsches Institut fr Normung, 2003).

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3

b=3,00m

1.

, , 2. s , w, ( .) . . , c, ( ). , , , c c . , , , . , , ( , ). , , , 3, 1. 1 . , (Loov R.E. and Patnaik K.A., 1994) .

16 , , , 21-23/10/ 2009, ,

4

hV QvI b= (1)

: vh , V , Q , I , b .

2.

vh

3.

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5

Din Fachbericht DIN 1045-1 DIN-Fachbericht 102 . 2. ( )

,

1/310,042Rd ct ct ck dv f b = (2)

: 1= 1,0 , ct ( ) , 1. ct=0, , 1, Nd (Nd

6

3.

( ), cot cot sin Rd sy s yd Ndv f b = + (3)

: s (cm2/m), , 45

7

45

8

, 6:

fRd ctd = (6) . . 4 , (CEB-FIB, 1991).

Rd (N/mm )2

1

2

1,0

2,0

3,0

4,0

min1 2 3 4

C20:f ctd=1,5/1,5=1,0

fcd=20/1,5=13,3 N/mm

f yk=500 N/mmf yd=500/1,15=435 N/mm

2

22

f yd (N/mm )2

4.

. : (1) (2) (, , ). , 4, , 200mm x 200mm x 200mm, 5(), . , 7,5%, 2,5%, 0,5% . . 1/3 .

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1mm. 5mm, , . , 5(). . (.. ). - .., 5(). 1cm . , . . 1 20 kN, . , , 5(), , (. ). - . , 6, 7, 8 =2,5%. . D Fachbericht 102, (Deutsches Institut fr Normung, 2003), 2,(CEN, 2003) CEB, (CEB-FIB, 1991), 0,3mm, (, 2000).

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4.

1 (=7,5%) 1 (=7,5%) - 2 (=2,5%) 2 (=2,5%) 2 (=2,5%) 3 (=0,5%) 3 (=0,5%) 3 (=0,5%) 4 (=0,0%) 4 (=0,0%) 4 (=0,0%)

() ()

5. () ()

0

200

400

600

800

1000

1200

0.00 0.75 1.50 2.25 3.00 3.75 4.50

P (k

N)

s(mm)

A CEB

A EC 2

A DIN-FACHBERICHT=2,5%

0

200

400

600

800

1000

1200

0 0.1 0.2 0.3 0.4

P (k

N)

w (mm)

=2,5%

A CEB

A EC 2

A DIN-FACHBERICHT=2,5%

() ()

1 - 1 - 2 -

2 - 3 - 3 -

4 - 4 - 5 -

0,3mm

6. =2,5% : () () .

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11

0

200

400

600

800

1000

1200

0.00 0.50 1.00 1.50 2.00

P (k

N)

s(mm)

A CEB

A EC 2

A DIN-FACHBERICHT=2,5%

0

200

400

600

800

1000

1200

0.00 0.05 0.10 0.15

P (k

N)

w (mm)

A CEB

A EC 2

A DIN-FACHBERICHT=2,5%

() ()

1 - 1 - 2 -

2 - 3 - 0,3mm

7. =2,5% : () () .

0

200

400

600

800

1000

1200

0.00 1.00 2.00 3.00 4.00 5.00

P (k

N)

s(mm)

A EC 2

A DIN-FACHBERICHT

=2,5%

0

200

400

600

800

1000

1200

0 0.4 0.8 1.2 1.6 2 2.4 2.8

P (k

N)

w (mm)

A EC 2

A DIN-FACHBERICHT

=2,5%

() ()

1 - 1 - 2 -

2 - 3 - 0,3mm

8. =2,5% : () () .

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0 7,5%. wk=0,3mm. . , 2, DIN Fachbericht CEB. :

. 2 CEB,

VRd2, . DIN Fachbericht , .

0,3 mm, . . , . , ..

, VRd2, , VRd2.

CEB-FIB,Model Code 1990, Final Draft, CEB Bulletin No 204, (1991). CEN [Comit Europen de Normalisation] (2003), Eurocode 2: Design of

concrete structures - Part 1-1: General rules and rules for buildings, (2003).

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Choi D.U., Jirsa J.O. and Fowler D.W., Shear Transfer across Interface between New and Existing Concretes Using Large Powder-Driven Nails, ACI Structural Journal, Vol. 96, Issue 2, (1999).

DIN Deutsches Institut fr Normung e.V.: DIN-Fachbericht 101 - Einwirkungen auf Brcken. Berlin: Beuth Verlag GmbH (2003).

DIN Deutsches Institut fr Normung e.V.: DIN-Fachbericht 102 - Betonbrcken. Berlin: Beuth Verlag GmbH (2003).

Jlio E., Branco F. and Silva V., Concrete-to-concrete bond strength. Influence of the roughness of the substrate surface, Construction and Building Materials, Vol. 18, Issue 9, (2004) 675-681.

Loov R. E. Patnaik K.A., Horizontal Shear Strength of Composite Concrete Beams with a rough interface, PCI JOURNAL, Vol.39, No 1 January-February (1994), 48-65.

Mattock, A. H., Shear Transfer in Reinforced Concrete, ACI Journal, February (1969) 17-42.

Menkulasi, F., Horizontal shear connectors for precast prestressed bridge decks., Thesis submitted for the degree of Master of Science in Civil Engineering, Virginia Polytechnic Institute, Blacksburk, Virginia, (2002).

(2000), (....).

., . ., , 3o & , , (2008).

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