## Abstract

Elaborated formulas to calculate the shear resistance for hybrid composite-concrete beams do not exist.

This paper returns to the basic principles of shear transfer in steel reinforced concrete beams and modifies

these formulas into predictive calculations for the theoretical shear capacity of hybrid compositeconcrete

beams. These calculations are based on the theoretical shear mechanisms – uncracked concrete

zone, aggregate interlock and dowel action. For the investigated hybrid beams, approximately half of the

shear force is taken by the uncracked concrete zone and aggregate interlock of the concrete and the

remaining half by dowel action. This theoretical approach is validated by the experimental shear failure

of eight hybrid beams with four different cross-sections. The calculation method clearly quantifies the

differences in shear behaviour of the investigated beam cross-sections and approaches the ultimate shear

capacity of all beam types relatively well, which proves this a valuable approach also for other hybrid

beam types.

This paper returns to the basic principles of shear transfer in steel reinforced concrete beams and modifies

these formulas into predictive calculations for the theoretical shear capacity of hybrid compositeconcrete

beams. These calculations are based on the theoretical shear mechanisms – uncracked concrete

zone, aggregate interlock and dowel action. For the investigated hybrid beams, approximately half of the

shear force is taken by the uncracked concrete zone and aggregate interlock of the concrete and the

remaining half by dowel action. This theoretical approach is validated by the experimental shear failure

of eight hybrid beams with four different cross-sections. The calculation method clearly quantifies the

differences in shear behaviour of the investigated beam cross-sections and approaches the ultimate shear

capacity of all beam types relatively well, which proves this a valuable approach also for other hybrid

beam types.

Original language | English |
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Pages (from-to) | 592 |

Number of pages | 8 |

Journal | Composite Structures |

Volume | 152 |

DOIs | |

Publication status | Published - 24 May 2016 |