Volume 13, Issue 3 And A (Transaction A: Civil Engineering, September 2015)
IJCE 2015, 13(3 And A): 245-254 |
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Abbasnia R, Aslami M. Numerical simulation of concrete fracture under compression by explicit discrete element method. IJCE 2015; 13 (3) :245-254
URL: http://ijce.iust.ac.ir/article-1-837-en.html
URL: http://ijce.iust.ac.ir/article-1-837-en.html
Abstract: (6963 Views)
A new model is proposed for two-dimensional simulation of the concrete fracture in compression. The model generated by
using the Voronoi diagram method and with considering random shape and distribution of full graded aggregates at the
mesoscopic level. The aggregates modeled by combining irregular polygons, which then is placed into the concrete with no
intersection between them. By this new modeling approach, the simulation of high-strength concretes with possible aggregates
fracture is also feasible. After generation of the geometrical model, a coupled explicit discrete element method and a modified
rigid body spring model have been used for solution. In this method, all the neighboring elements are connected by springs.
The mortar springs have Elasto-plastic behavior and considering normal concrete, the aggregate springs behave only
elastically without any fracture. The proposed model can accurately predict the mechanical behavior of concrete under
compression for small and large deformations both descriptively and quantitatively
Keywords: Concrete fracture, Numerical simulation, Explicit discrete element method, Voronoi diagram, Mesoscale simulation
Type of Study: Research Paper |
Subject:
Structure- Concrete
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