Structures made of a material with a very high standard deviation, as fibre reinforced concrete, show a too safe prediction of the maximum bearing capacity when derived from characteristic values identified by means of small specimens. This is emphasized when the structures are characterized by a large redundancy. To this regards full-scale slabs on ground having a high grade of redundancy are considered as reference test. Italian Standard and more recently Model Code 2010 have introduced a coefficient (structural redistribution factor) able to take into account the reduced variability of the mechanical strength when associated to a large volume involved in the failure process or when the structure is able to significantly redistribute stresses favouring the average strength rather than the minimum one. A numerical procedure taking into account the real heterogeneity of the mechanical characteristics in the structure, is for the first time introduced for the redistribution factor evaluation.

A numerical approach for the evaluation of the structural redistribution coefficient KRd

DI PRISCO, MARCO;MARTINELLI, PAOLO
2014

Abstract

Structures made of a material with a very high standard deviation, as fibre reinforced concrete, show a too safe prediction of the maximum bearing capacity when derived from characteristic values identified by means of small specimens. This is emphasized when the structures are characterized by a large redundancy. To this regards full-scale slabs on ground having a high grade of redundancy are considered as reference test. Italian Standard and more recently Model Code 2010 have introduced a coefficient (structural redistribution factor) able to take into account the reduced variability of the mechanical strength when associated to a large volume involved in the failure process or when the structure is able to significantly redistribute stresses favouring the average strength rather than the minimum one. A numerical procedure taking into account the real heterogeneity of the mechanical characteristics in the structure, is for the first time introduced for the redistribution factor evaluation.
Computational Modelling of Concrete Structures
9781138001459
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/881622
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