TY - GEN
T1 - Investigation of bond damaged RC beams with various shear-span to depth ratios
AU - Li, R.
AU - Ni, H.
AU - Aboutaha, R. S.
N1 - Publisher Copyright:
© 2023 selection and editorial matter, Khaled M. Mahmoud; individual chapters, the contributors.
PY - 2023
Y1 - 2023
N2 - Corrosion of steel bars is considered as one of the most critical durability issues for bridge pier cap beams, during its service lives. The shear-span to depth ratio (av=d) also affect the failure mode, and durability of reinforced concrete (RC) beams. A limited models have been developed for estimating the effects of loss of bond on ultimate strength of beams, particularly those with different shear-span to depth ratios. This study investigates the role of unbonded rebar length Lub (0%L, 15%L, 30%L and 45%L) on ultimate strength of RC beams, having shear-span to depth ratio (av=d) of (2.0, 4.0 and 6.0), respectively. The results suggest that the unbonded rebar length have significant effect on the performance of RC beams with various shear-span to depth ratios. As the unbonded rebar length increases, the failure mode of some RC beams turned from shear failure to flexural failure. Additionally, the ultimate strength, stiffness, and ductility decrease under the same failure mode.
AB - Corrosion of steel bars is considered as one of the most critical durability issues for bridge pier cap beams, during its service lives. The shear-span to depth ratio (av=d) also affect the failure mode, and durability of reinforced concrete (RC) beams. A limited models have been developed for estimating the effects of loss of bond on ultimate strength of beams, particularly those with different shear-span to depth ratios. This study investigates the role of unbonded rebar length Lub (0%L, 15%L, 30%L and 45%L) on ultimate strength of RC beams, having shear-span to depth ratio (av=d) of (2.0, 4.0 and 6.0), respectively. The results suggest that the unbonded rebar length have significant effect on the performance of RC beams with various shear-span to depth ratios. As the unbonded rebar length increases, the failure mode of some RC beams turned from shear failure to flexural failure. Additionally, the ultimate strength, stiffness, and ductility decrease under the same failure mode.
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U2 - 10.1201/9781032638294-25
DO - 10.1201/9781032638294-25
M3 - Conference contribution
AN - SCOPUS:85185550288
SN - 9781032638232
T3 - Risk-Based Strategies for Bridge Maintenance
SP - 279
EP - 286
BT - Risk-Based Strategies for Bridge Maintenance
A2 - Mahmoud, Khaled M.
PB - CRC Press/Balkema
T2 - 11th New York City Bridge Conference, 2023
Y2 - 21 August 2023 through 22 August 2023
ER -