TY - JOUR
T1 - Residual load bearing capacity and failure mechanism of impacted high-strength reinforced concrete shear beams
AU - Dok, Gokhan
AU - Caglar, Naci
AU - Ilki, Alper
AU - Yilmaz, Cemal
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/3
Y1 - 2021/3
N2 - An experimental study was performed to determine the dynamic structural response of high-strength reinforced concrete (RC) beams exposed to impacts of various energies. The residual load-bearing capacities of the impacted beams were measured by static loading tests after their dynamic impact responses had been assessed. Considering the shear behavior of the RC beams, their cross-sectional dimensions and length of were set as 250 mm × 400 mm and 2800 mm, respectively. Dropping masses of 240, 360, and 480 kg from a height of 3 m were used in the impact tests. The dynamic strength, acceleration, and deformation mode depending on the effect of the impact were investigated. After the impact tests, quasi-static bending tests of the impact-damaged beams were performed, and the results were compared with those of an undamaged reference RC beam. The residual strength, stiffness and the failure mechanism were selected as comparison criteria to evaluate the experimental results of the static tests. The dynamic test results depended on the applied impact energy and the damage intensity of the specimens. The residual strength and stiffness of the impact-damaged beams were lower than those of the reference specimen, particularly for the beam subjected to the largest impact. In addition, a significant reduction in energy dissipation capacity of the impact-damaged beams was observed during the static tests.
AB - An experimental study was performed to determine the dynamic structural response of high-strength reinforced concrete (RC) beams exposed to impacts of various energies. The residual load-bearing capacities of the impacted beams were measured by static loading tests after their dynamic impact responses had been assessed. Considering the shear behavior of the RC beams, their cross-sectional dimensions and length of were set as 250 mm × 400 mm and 2800 mm, respectively. Dropping masses of 240, 360, and 480 kg from a height of 3 m were used in the impact tests. The dynamic strength, acceleration, and deformation mode depending on the effect of the impact were investigated. After the impact tests, quasi-static bending tests of the impact-damaged beams were performed, and the results were compared with those of an undamaged reference RC beam. The residual strength, stiffness and the failure mechanism were selected as comparison criteria to evaluate the experimental results of the static tests. The dynamic test results depended on the applied impact energy and the damage intensity of the specimens. The residual strength and stiffness of the impact-damaged beams were lower than those of the reference specimen, particularly for the beam subjected to the largest impact. In addition, a significant reduction in energy dissipation capacity of the impact-damaged beams was observed during the static tests.
KW - High-strength concrete
KW - Impact
KW - Reinforced concrete beam
KW - Residual capacity
KW - Shear
UR - http://www.scopus.com/inward/record.url?scp=85098709934&partnerID=8YFLogxK
U2 - 10.1016/j.engfailanal.2020.105185
DO - 10.1016/j.engfailanal.2020.105185
M3 - Article
AN - SCOPUS:85098709934
SN - 1350-6307
VL - 121
JO - Engineering Failure Analysis
JF - Engineering Failure Analysis
M1 - 105185
ER -