Abstract
The effects of specimen size, area fraction of coarse aggregates and porosity on the nominal tensile strength of concrete are investigated by uniaxial tensile simulations based on the Monte Carlo random aggregate model. First, a four-phase random aggregate model, consisting of cement mortar matrix, coarse aggregate, cohesive band and the initial defect, is presented. The numerical simulation is carried out by considering specimen size, area fraction of coarse aggregate and porosity on the nominal tensile strength of concrete, and corresponding fitting formulas are proposed. Next, the relationships of the combined effects on the nominal tensile strength of concrete are shown using the multiplicative form of power exponential function. The proposed formula for the multi-factor combined effect shows good precision.
Original language | English (US) |
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Pages (from-to) | 585-595 |
Number of pages | 11 |
Journal | Construction and Building Materials |
Volume | 165 |
DOIs | |
State | Published - Mar 20 2018 |
Funding
The authors would like to acknowledge the financial support by the National Natural Science Foundation of China ( 51408489 , 51248007 , 51308448 and 11572249 ), the China Scholarship Council ( 201606295016 ), the Shaanxi National Science Foundation of China ( 2017JM5077 ), and the Top International University Visiting Program for Outstanding Young Scholars of Northwestern Polytechnical University .
Keywords
- Meso-scale simulation
- Multi-factor effect
- Nominal tensile strength
- Random aggregate model
- Size effect
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- General Materials Science