Punching resistance of flat slabs strengthened with an added layer of UHPFRC
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Bibliographic Details
| Author(s): |
Maléna Bastien-Masse
(INGPHI SA, Lausanne, Switzerland)
Jürgen Einpaul (Department of Civil and Environmental Engineering, Imperial College, London, UK) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Symposium: Engineering the Future, Vancouver, Canada, 21-23 September 2017 | ||||
| Published in: | IABSE Symposium Vancouver 2017 | ||||
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| Page(s): | 2699-2706 | ||||
| Total no. of pages: | 8 | ||||
| Year: | 2017 | ||||
| DOI: | 10.2749/vancouver.2017.2699 | ||||
| Abstract: |
Existing Reinforced Concrete (RC) slabs often show insufficient punching shear resistance when verified for updated loads. A simple and fast method to strengthen these slabs is casting a layer of Ultra-High Performance Fiber Reinforced cement-based Composite (UHPFRC), with or without reinforcing bars, on its top surface. This method has been shown to be very efficient, as the layer of UHPFRC does not only increase the flexural resistance of the slab but it also carries part of the shear. This paper presents a recently developed model to predict the punching shear resistance of composite slabs strengthened with an added layer of UHPFRC. In this model, the contribution of the RC section is estimated with a new punching resistance model based on plasticity and fracture mechanics. A method is proposed to calculate the contribution of the UHPFRC layer to the punching resistance. |
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| Keywords: |
strengthening flat slabs compression zone plasticity composite slabs punching resistance Ultra-High Performance Fiber Reinforced cement-based Composite (UHPFRC) near interface cracking triaxial stress state
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