4.4 Results and Analysis
91
Fig. 4.10 Definition of toughness in terms of different multiples of first-crack deflection (Farnam
et al. 2010)
listed in Table 4.3. Here, the lowest value of R cr 0 = 0.123 MPa for the specimen TC12 is adopted. “—” denotes that the maximum strain of the experimental deviatoric
stress-axial strain curve could not reach the correspondingly specified strain. As can
be seen in Table 4.3, the maximum triaxial toughness indices of UHPCC can reach
the 82.52 times of the uniaxial toughness indices of UHPCC within elastic stage,
Table 4.3 Toughness indices of UHPCC under triaxial compression
No
σ 3 (MPa)
First-crack strain ε cr
TI 1
TI 3
TI 5
TI 7
TC1-1
0
0.0040
1.05
5.89
—
—
TC1-2
0
0.0039
1.00
6.50
—
—
TC1-3
10
0.0045
1.40
10.27
19.05
—
TC1-4
20
0.0044
1.60
11.70
23.80
33.49
TC1-5
30
0.0053
2.13
15.95
32.75
49.31
TC1-6
40
0.0043
1.35
11.60
24.90
36.56
TC1-7
60
0.0047
1.24
12.10
26.63
41.94
TC1-8
80
0.0056
2.83
21.39
45.24
69.25
TC2-1
0
0.0053
1.62
7.29
—
—
TC2-2
0
0.0049
1.87
8.24
—
—
TC2-3
10
0.0057
3.22
15.94
23.74
30.56
TC2-4
20
0.0058
3.54
20.14
32.71
—
TC2-5
30
0.0057
3.07
23.15
43.08
59.07
TC2-6
40
0.0057
3.30
23.34
40.84
—
TC2-7
60
0.0058
3.28
19.46
49.71
71.94
TC2-8
80
0.0058
2.50
25.63
55.10
82.52
TC2-9
100
0.0058
1.78
22.88
51.92
75.81
91
Fig. 4.10 Definition of toughness in terms of different multiples of first-crack deflection (Farnam
et al. 2010)
listed in Table 4.3. Here, the lowest value of R cr 0 = 0.123 MPa for the specimen TC12 is adopted. “—” denotes that the maximum strain of the experimental deviatoric
stress-axial strain curve could not reach the correspondingly specified strain. As can
be seen in Table 4.3, the maximum triaxial toughness indices of UHPCC can reach
the 82.52 times of the uniaxial toughness indices of UHPCC within elastic stage,
Table 4.3 Toughness indices of UHPCC under triaxial compression
No
σ 3 (MPa)
First-crack strain ε cr
TI 1
TI 3
TI 5
TI 7
TC1-1
0
0.0040
1.05
5.89
—
—
TC1-2
0
0.0039
1.00
6.50
—
—
TC1-3
10
0.0045
1.40
10.27
19.05
—
TC1-4
20
0.0044
1.60
11.70
23.80
33.49
TC1-5
30
0.0053
2.13
15.95
32.75
49.31
TC1-6
40
0.0043
1.35
11.60
24.90
36.56
TC1-7
60
0.0047
1.24
12.10
26.63
41.94
TC1-8
80
0.0056
2.83
21.39
45.24
69.25
TC2-1
0
0.0053
1.62
7.29
—
—
TC2-2
0
0.0049
1.87
8.24
—
—
TC2-3
10
0.0057
3.22
15.94
23.74
30.56
TC2-4
20
0.0058
3.54
20.14
32.71
—
TC2-5
30
0.0057
3.07
23.15
43.08
59.07
TC2-6
40
0.0057
3.30
23.34
40.84
—
TC2-7
60
0.0058
3.28
19.46
49.71
71.94
TC2-8
80
0.0058
2.50
25.63
55.10
82.52
TC2-9
100
0.0058
1.78
22.88
51.92
75.81