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Simulation of the multiaxial loading behavior of fiber reinforced concrete



Title: Simulation of the multiaxial loading behavior of fiber reinforced concrete
Author(s): E.A. Schauffert and G. Cusatis
Paper category : conference
Book title: 2nd International RILEM Conference on Strain Hardening Cementitious Composites (SHCC2-Rio)
Editor(s): R.D. Toledo Filho, F.A. Silva, E.A.B. Koenders and E.M.R. Fairbairn
ISBN: 978-2-35158-120-9
e-ISBN: 978-2-35158-121-6
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 243 - 250
Total Pages: 8
Nb references: 20
Language: English


Abstract: The Lattice Discrete Particle Model (LDPM) is a mesoscale model for heterogeneous materials. Coarse aggregate particles and their surrounding mortar are modeled as rigid polyhedral cells. A tetrahedralization of the particle centers generates a lattice framework where each member is associated with a triangular-shaped plane of contact (facet) between two cells. Behavior is governed by a vectorial constitutive law imposed at the facets. A natural extension for this discrete model is to include the effect of fibers as discrete entities within the mesostructure. Typically, recent modeling advancements account for the contribution of fibers through enhanced constitutive laws, or statistical representations of a micromechanical pullout model. In order to maintain its discrete nature, LDPM incorporates fiber effect by modeling individual fibers, randomly placed within the framework according to a given volume fraction. The number and orientation of fibers crossing each facet is computed, and the contribution of each fiber to the facet response is formulated on the basis of a previously established micromechanical model for fiber-matrix interaction. The theory for the developed model, entitled LDPM-F, is summarized. Calibration and validation is performed through the simulation of structural testing results, including direct tension and confined and unconfined compression.


Online publication: 2012-01-25
Publication type : full_text
Public price (Euros): 0.00