Title: Constitutive Model for Aggregate Interlock in FEM Analyses of Concrete Interfaces with Embedded Steel Bars

Author(s): Diogo Figueira, Carlos Sousa and Afonso Serra Neves

Publication: IJCSM

Volume: 14

Issue:

Appears on pages(s):

Keywords: aggregate interlock, finite element analysis, reinforced concrete, shear

DOI: 10.1186/s40069-019-0390-8

Date: 3/31/2020

Abstract:
A nonlinear finite element model (FEM) is developed to assess the behaviour of a cracked concrete interface, rein‑ forced with embedded steel bars and subjected to monotonic loading. A dowel action finite element modelling approach is conceived for that purpose. The bond between the steel bars and the surrounding concrete is also con‑ sidered in the model and an interface finite element is included to simulate aggregate interlock. Then, the compari‑ son of the model results with experimental values allowed the calibration of aggregate interlock constitutive relations for cracks in monolithic concrete restrained by embedded steel bars. New constitutive relations are also proposed for shear transfer by aggregate interlock in a concrete joint.