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Ramos, Ap
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document
MATERIAL AND GEOMETRICAL PARAMETERS AFFECTING PUNCHING OF REINFORCED CONCRETE FLAT SLABS WITH ORTHOGONAL REINFORCEMENT
Abstract
The influence of various parameters on punching behaviour is still in discussion and contradictory conclusions were drawn by several authors. In order to contribute with new information, a parametric analysis regarding geometrical and material parameters affecting punching behaviour of flat slabs with orthogonal reinforcement and square columns was run in a previously verified 3D nonlinear finite element analysis. It was found that compressive strength, fracture energy and reinforcement ratio are the most important parameters, contrary to tensile strength and modulus of elasticity, regarding punching load. It was shown that the concept of structural brittleness is appropriate to be used in punching load provisions by codes, turning possible its use in a broad range of concrete types.