310
9 Dynamic Responses of Reinforced UHPCC Members Under …
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0
10
20
30
40
50
60
LVDT1 of FE (Wei et al. 2019)
LVDT2 of FE (Wei et al. 2019)
LVDT1 of FE in this study
LVDT2 of FE in this study
LVDT1 of test (Wei et al. 2019)
LVDT2 of test (Wei et al. 2019)
Deflection (mm)
Time (s)
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0
10
20
30
40
50
60
Deflection (mm)
Time (s)
LVDT1 of FE in this study
LVDT2 of FE in this study
LVDT1 of FE (Wei et al. 2019)
LVDT2 of FE (Wei et al. 2019)
LVDT1 of test (Wei et al. 2019)
LVDT2 of test (Wei et al. 2019)
0.00
0.01
0.02
0.03
0.04
0.05
0
10
20
30
40
50
Deflection (mm)
Time (s)
LVDT1 of FE in this study
LVDT2 of FE in this study
LVDT1 of FE (Wei et al. 2019)
LVDT2 of FE (Wei et al. 2019)
LVDT1 of test (Wei et al. 2019)
LVDT2 of test (Wei et al. 2019)
(a)
(b)
(c)
Fig. 9.38 Deflection-time histories for specimen a U-C-1.5 b U-C-1.75 c U-S-1
Fig. 9.39 Damage contour of specimen a U-C-1.5 b U-C-1.75 c U-S-1
9.38 and 9.39 show the comparisons between the experimental and numerical simulated impact force- and deflection-time histories, as well as the damage contour of
UHPC columns, respectively. As can be seen obviously that, the predicted instantaneous impact forces are consistent fairly well with the experimental data, which is
also better than the numerical results of Wei et al. (2019), especially for the impact
time durations. It should be pointed out that, the present final damage level of specimens is not reproduced well than that of Wei et al. (2019), which is caused by the
larger element size, i.e., 10 mm mesh, adopted in this study.
9.5.2 UHPC-FST Members
9.5.2.1 Wu et al. (2019) Test
The effect of impact energy on the dynamic response of simply supported UHPCFST beams with circular cross-section was studied according to the drop weight
test on the middle span of specimens with different release heights, i.e., 5, 8 and
11 m (Wu et al. 2019). As shown in Fig. 9.40, the length and net span of specimen
are 2000 and 1600 mm, the outer diameter of cross-section is 203 mm, and outer
steel tube thickness is 6 mm. respectively. The compressive strength, elastic modulus
and Poisson’s ratio of UHPC were 141.5 MPa, 43.8 GPa and 0.23, respectively. The
yield strength and elastic modulus of steel were 318.5 MPa and 206 GPa, respectively.
The mass of drop hammer is 530 kg, and its indenter diameter of flat head type drop
9 Dynamic Responses of Reinforced UHPCC Members Under …
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0
10
20
30
40
50
60
LVDT1 of FE (Wei et al. 2019)
LVDT2 of FE (Wei et al. 2019)
LVDT1 of FE in this study
LVDT2 of FE in this study
LVDT1 of test (Wei et al. 2019)
LVDT2 of test (Wei et al. 2019)
Deflection (mm)
Time (s)
0.00
0.01
0.02
0.03
0.04
0.05
0.06
0
10
20
30
40
50
60
Deflection (mm)
Time (s)
LVDT1 of FE in this study
LVDT2 of FE in this study
LVDT1 of FE (Wei et al. 2019)
LVDT2 of FE (Wei et al. 2019)
LVDT1 of test (Wei et al. 2019)
LVDT2 of test (Wei et al. 2019)
0.00
0.01
0.02
0.03
0.04
0.05
0
10
20
30
40
50
Deflection (mm)
Time (s)
LVDT1 of FE in this study
LVDT2 of FE in this study
LVDT1 of FE (Wei et al. 2019)
LVDT2 of FE (Wei et al. 2019)
LVDT1 of test (Wei et al. 2019)
LVDT2 of test (Wei et al. 2019)
(a)
(b)
(c)
Fig. 9.38 Deflection-time histories for specimen a U-C-1.5 b U-C-1.75 c U-S-1
Fig. 9.39 Damage contour of specimen a U-C-1.5 b U-C-1.75 c U-S-1
9.38 and 9.39 show the comparisons between the experimental and numerical simulated impact force- and deflection-time histories, as well as the damage contour of
UHPC columns, respectively. As can be seen obviously that, the predicted instantaneous impact forces are consistent fairly well with the experimental data, which is
also better than the numerical results of Wei et al. (2019), especially for the impact
time durations. It should be pointed out that, the present final damage level of specimens is not reproduced well than that of Wei et al. (2019), which is caused by the
larger element size, i.e., 10 mm mesh, adopted in this study.
9.5.2 UHPC-FST Members
9.5.2.1 Wu et al. (2019) Test
The effect of impact energy on the dynamic response of simply supported UHPCFST beams with circular cross-section was studied according to the drop weight
test on the middle span of specimens with different release heights, i.e., 5, 8 and
11 m (Wu et al. 2019). As shown in Fig. 9.40, the length and net span of specimen
are 2000 and 1600 mm, the outer diameter of cross-section is 203 mm, and outer
steel tube thickness is 6 mm. respectively. The compressive strength, elastic modulus
and Poisson’s ratio of UHPC were 141.5 MPa, 43.8 GPa and 0.23, respectively. The
yield strength and elastic modulus of steel were 318.5 MPa and 206 GPa, respectively.
The mass of drop hammer is 530 kg, and its indenter diameter of flat head type drop