Title: Simulating Tensile and Compressive Failure Process of Concrete with a User-defined Bonded-Particle Model

Author(s): Jinhui Ren , Zhenghong Tian, Jingwu Bu

Publication: IJCSM

Volume: 12

Issue:

Appears on pages(s):

Keywords: three-dimensional simulation, failure process, concrete, user-defined bonded-particle model, PFC3D

DOI: https://doi.org/10.1186/s40069-018-0292-1

Date: 9/30/2018

Abstract:
A user-defined bonded-particle model (UBM) which is based on the modified parallel bond was established in this paper to investigate the tensile and compressive failure mechanism of concrete on the three-dimensional (3D) level. The contact constitutive relation and the failure criterion of the UBM can be added to the commercial discrete ele-ment software PFC3D by compiling them as a dynamic link library file and loading it into PFC3D whenever needed. In addition, the aggregate particles can be generated according to the volume fraction and the shape of each aggre-gate is irregular. Then, by comparing the results of numerical simulation with the results of laboratory tests, it is found that this bonded-particle model can simulate the tensile and compressive failure process of concrete well to a certain extent. Specifically, the two have basically similar failure patterns and stress–strain responses no matter under tension or compression loading condition. All results indicate that this UBM is a promising tool in understanding and predict-ing the tensile and compressive failure process of concrete.