Shear strength evaluation of RC bridge deck slabs according to CSCT with multi – layered shell elements and PARC_CL Crack Model
The shear resistance of RC slabs without shear reinforcement subjected to concentrated loads near linear support is usually calibrated on the base of tests on one – way slabs with rectangular cross section. However, the actual behavior of slabs subjected to concentrated loads is described properly by a two-way slab response. The aim of this paper consists in the evaluation of the shear resistance of bridge deck slabs using analytical formulations and Nonlinear Finite Element Analyses (NLFEA). The obtained numerical results are consequently compared with experimental observations from two test campaigns. The case studies were analysed by NLFE analyses carried out using the constitutive Crack Model PARC_CL (Physical Approach for Reinforced Concrete under Cycling Loading) implemented in the user subroutine UMAT.for in Abaqus Code. In order to predict properly global and local failure modes through a NLFE model, a multi – layered shell modelling has been used. As shell element modelling is not able to detect out – of – plane shear failures, the ultimate shear resistance of these slabs is evaluated by means of a post – processing method according to the Critical Shear Crack Theory (CSCT).
Keywords: analyse non linéaire ; armature ; béton ; charge de trafic ; charge variable ; chargement monotone ; dalle ; dimensionnement ; effort tranchant ; essai dynamique ; essai statique ; fissuration ; méthode des éléments finis ; pont routier ; résistance à l'effort tranchant ; théorie de la fissure critique ; non linear analysis ; reinforcement ; concrete ; traffic load ; variable load ; monotonic loading ; slab ; design ; shear force ; dynamic test ; static test ; crack growth ; finite element method ; road bridge ; shear strength ; critical crack theory
Record created on 2015-09-29, modified on 2016-08-09