### Abstract

In many structural applications, prestressed hollow core
slabs need to be provided with different types of end
notch. The frequently used types of notch and cut-out,
and their effect on the failure mechanisms and shear
capacity of the hollow core units are discussed. The
theoretical principles and procedures for determining the
shear capacity of notched hollow core members are
presented. A reduction factor to be applied to the shear
capacity of corresponding unnotched slabs is introduced.
Methods of analysis, solutions and iteration procedures
for the different failure mechanisms and for the
evaluation of the shear capacities of both notched and
unnotched slabs are proposed. The principles and
procedures are applied to prestressed hollow core slabs
with circular voids and curved end notches and the
reduction factors are evaluated by using the finite
element method. The stab thickness, notch depth, and
amount of prestressing reinforcement are varied. It is
concluded that: (i) the shear capacity is determined by
shear tension failure of the web and is not reduced if
the relative depth of notch is less than 40%; (ii) the
shear capacity is governed by flexural cracking of the
bottom edge of the slab and is considerably reduced if
the relative depth of notch is more than 40%; and (iii)
the amount of prestressing reinforcement has a minor
effect on the reduction factor (<l5%). A tentative design
recommendation for the reduction factor is also given.

Original language | English |
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Pages (from-to) | 63-74 |

Journal | Structural Engineering Review |

Volume | 7 |

Issue number | 2 |

Publication status | Published - 1995 |

MoE publication type | B1 Article in a scientific magazine |

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## Cite this

Girhammar, U. A., & Pajari, M. (1995). Shear capacity of notched prestressed hollow core slabs with circular voids.

*Structural Engineering Review*,*7*(2), 63-74.