The national standards referring to ph floors indicates that in case deformable supports are used, when shear resistance of slab is verified and when values of tensile principal stresses are calculated additional shear stresses acting in transverse direction to floor span should be considered. Experimental tests conducted in VTT in Espoo and numerical analyses showed that size of non-rigid supports influence is dependent on several factors for example: depth of concrete filled cores, structural topping presence or element type support and geometry. This paper presents the computational scheme verifying shear resistance supported on non-rigid elements with consequences of missing this effect.

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