Flat slabs and foundations

New punching shear reinforcement systems

The structural design of flat slab systems is usually governed by the punching shear resistance of the slab. To achieve a sufficient punching shear resistance at reasonable slab thickness, shear reinforcement often cannot be avoided. The upper bound of the punching shear resistance is characterised by a concrete crushing located directly at the column face. To strengthen the highly stressed portion of the slab around the column, pre-cast fibre-reinforced Ultra High Performance Concrete (UHPC) units were installed in the compression zone, replacing the normal strength concrete (NSC). Punching...

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Punching shear reinforcement with increased bond resistance

Flat slabs with lattice girders as semi-precast construction system feature horizontal composite joints between the semi-precast concrete slabs and the in-situ concrete topping. Both the punching...

Issue 02/2014 New design tools for practice

Punching shear –

While DIN EN 1992-1-1 and the national annex of Germany treat punching shear design for in-situ concrete slabs and centrically loaded footings in great detail [1, 2], joints between semi precast...

Issue 02/2021

Punching shear behavior of steel fiber reinforced flat slabs in combination with punching shear reinforcement

The guideline “Steel Fibre Reinforced Concrete” published by the German Committee for Reinforced Concrete (DAfStb) in 2012 regulates the punching shear design of steel fiber reinforced flat slabs...

Issue 06/2022

Experimental investigations on punching shear of flat slabs made of carbon-reinforced concrete

So far, European standards do not stipulate generally applicable verification rules for the punching shear of slabs made of carbon-reinforced concrete. In addition, regulations on the structural...

Issue 11/2021 Monday, 15th November → Innovation workshop (6)

New European Assesment for punching shear reinforcement

Flat slabs made of reinforced concrete are supported directly on columns. The total height of the slab construction is reduced and the formwork effort is simplified because beams are done away with....