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Design of concrete mix used to make tested cylindrical specimens_
| No. | Constituent | Mass |
|---|---|---|
| [kg/m3] | ||
| 1 | Cement CEM I 42.5R | 365.0 |
| 2 | Aggregate 2–8 mm | 650.0 |
| 3 | Aggregate 8–16 mm | 560.0 |
| 4 | Sand 0–2 mm | 650.0 |
| 5 | Water | 175.0 |
| 6 | Superplasticizer (1.2% of cement mass) | 4.5 |
Comparison of beam deflections for constant and variable Young's modulus of concrete_
| No. | Load | Bending effort of the element | Constant Young's modulus | Variable Young's modulus | Relative increment in deflection |
|---|---|---|---|---|---|
| α | α’ | ||||
| [kN/m] | [%] | [mm] | [mm] | [%] | |
| 1 | 40 | 58 | 10.20 | 10.26 | 0.59 |
| 2 | 45 | 66 | 11.69 | 11.84 | 1.28 |
| 3 | 50 | 73 | 13.16 | 13.44 | 2.13 |
| 4 | 55 | 80 | 14.61 | 15.08 | 3.22 |
| 5 | 60 | 88 | 16.05 | 16.75 | 4.36 |
| 6 | 65 | 95 | 17.49 | 18.48 | 5.66 |
Comparison of deflections for bar model and FEM model_
| No. | Bar model | FE model | Relative difference between α〉 and αCDP | ||
|---|---|---|---|---|---|
| Load | Constant Young's modulus | Variable Young's modulus | ABAQUS - CDP | ||
| α | α’ | αCDP | |||
| [kN/m] | [mm] | [mm] | [mm] | [%] | |
| 1 | 40 | 10.20 | 10.26 | 9.90 | 3.51 |
| 2 | 45 | 11.69 | 11.84 | 12.09 | 2.11 |
| 3 | 50 | 13.16 | 13.44 | 14.31 | 6.47 |
| 4 | 55 | 14.61 | 15.08 | 16.57 | 9.88 |
| 5 | 60 | 16.05 | 16.75 | 18.88 | 12.72 |
| 6 | 65 | 17.49 | 18.48 | 21.23 | 14.88 |