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Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 292801, 8 pages
http://dx.doi.org/10.1155/2013/292801
Research Article

Application of Base Force Element Method to Mesomechanics Analysis for Recycled Aggregate Concrete

1Key Lab of Urban Security & Disaster Engineering, Department of Civil Engineering, Beijing University of Technology, Beijing 100124, China
2AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

Received 18 July 2013; Accepted 23 August 2013

Academic Editor: Song Cen

Copyright © 2013 Yijiang Peng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The base force element method (BFEM) on potential energy principle is used to analyze recycled aggregate concrete (RAC) on mesolevel. The model of BFEM with triangular element is derived. The recycled aggregate concrete is taken as five-phase composites consisting of natural coarse aggregate, new mortar, new interfacial transition zone (ITZ), old mortar, and old ITZ on meso-level. The random aggregate model is used to simulate the mesostructure of recycled aggregate concrete. The mechanics properties of uniaxial compression and tension tests for RAC are simulated using the BFEM, respectively. The simulation results agree with the test results. This research method is a new way for investigating fracture mechanism and numerical simulation of mechanics properties for recycled aggregate concrete.