Zur maximalen Durchstanztragfähigkeit von Flachdecken.

Abstract

Maximum Punching Capacity of Flat SlabesEurocode 2 assesses the maximum punching shear resistance by limiting the nominal shear stress at the periphery of the load to a value equal to the web-crushing limit of beams with shear reinforcement. However, experimental investigations revealed that in most cases the failure occurs at a lower load level once the compression zone at the column face crushes. Furthermore, Eurocode 2 overestimates the maximum shear punching capacity for slabs including stirrups compared to the capacity of slabs including double-headed studs according to construction approvals. To verify the maximum punching shear capacity according to Eurocode 2, at the Institute of Structural Concrete, RWTH Aachen University a punching test on a slab including stirrups as shear reinforcement was conducted and, in addition, tests from literature were evaluated.

Experimental investigations on the punching behaviour of reinforced concrete footings with structural dimensions

“…At failure load, the concrete contribution is much reduced and the highly stressed compression strut to the column is critical for the punching shear failure. Similar observations were made in punching tests on flat slabs (see [15, 16]).…”

Durchstanztragverhalten von Flachdecken mit variierenden Durchstanzbewehrungsgraden

“…In diesem Fall wurde die einwirkende Zugkraft der Abspannungen über den Stützenfuß der Platte sowie ein Stahlauflager wieder in den Hallenboden ( h = 800 mm) eingeleitet. Eine genauere Beschreibung dieses Versuchsstands ist in zu finden. Die aufgebrachte Kraft wurde grundsätzlich manuell hydraulisch geregelt.…”

“… Versuchsaufbau für Flachdeckenausschnitte mit einem Lasteinleitungsumfang von Ø LE = 2,40 m nach Test setup for flat slabs with a load perimeter at Ø LE = 2.40 m according to …”

Punching shear design of footings: critical review of different code provisions

“…For Eurocode 2 in Germany [1, 2], the level of safety was reviewed by test evaluations and parametric calculations [11, 12, 13, 14, 15, 16]; in particular, the design concept for the punching shear design of footings and ground slabs applicable in Germany was adapted. The modifications are summarized in the National Annex, including the A1‐modification (abbreviated to NA(D) [1, 2]).…”