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Shear Capacity of Prestressed FRC Beams with Sparse Stirrup Spacing

Kálmán KORIS

Kálmán KORIS

Faculty of Civil Engineering, Budapest University of Technology and EconomicsBudapest, Hungary
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KORIS, Kálmán
 et 
István BÓDI

István BÓDI

Faculty of Civil Engineering, Budapest University of Technology and EconomicsBudapest, Hungary
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BÓDI, István
  
01 avr. 2019
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Publié en ligne: 01 avr. 2019
Pages: 81 - 88
Reçu: 25 juin 2017
Accepté: 05 janv. 2018
DOI: https://doi.org/10.21307/acee-2018-008
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© 2018 Kálmán Koris et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Side view and cross-section of tested beams
Side view and cross-section of tested beams

Figure 2.

Shear loading arrangement of beam T90 and picture of the T90 beam on the test stand
Shear loading arrangement of beam T90 and picture of the T90 beam on the test stand

Figure 3.

Measured and numerically calculated shear force – displacement diagrams
Measured and numerically calculated shear force – displacement diagrams

Figure 4.

Shear strength utilization of beam T70 in case of different fibre contents
Shear strength utilization of beam T70 in case of different fibre contents

Figure 5.

Shear force – deflection and shear crack width diagrams of beam T90 in case of different fibre volumes
Shear force – deflection and shear crack width diagrams of beam T90 in case of different fibre volumes

Values of centric tensile strength in case of the tested beams

Beam type Concrete grade Fibre volume fraction [kg/m3] Performance class (L2) [N/mm2] Centric tensile strengh [N/mm2]
C25/30 Actual concrete
T70 C40/50 20 0.488 0.631 0.233
R70 C40/50 20 0.488 0.631 0.233
T90 C50/60 30 1.007 1.564 0.579
T140 C50/60 20 0.488 0.736 0.272

Dimensions, material grades and longitudinal reinforcement of tested beams

Type of beam
T70 R70 T90 T140
Total length L [m] 11.96 14.36 19.00 24.67
Heigh (at midspan) h [m] 0.70 0.70 0.90 1.40
Concrete grade (prefabricated girder) C40/50 C40/50 C50/60 C50/60
Dramix fibre volume [kg/m3] 20 20 30 20
Longitudnial reinforcement Bottom 2φ16 + 2×3Fp93-1860 3×4Fp93-1860 6×2Fp93-1860 4×4Fp93-1860
Top 2φ16 + 2×Fp52-1860 4×Fp52-1860 4×Fp52-1860 2×Fp52-1860
Design load pd [kN/m] 25.34 38.28 18.9 32.92
Langue:
Anglais
Périodicité:
4 fois par an
Sujets de la revue:
Architecture et design, Architecture, Architectes, bâtiments
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