Investigation of bond damaged RC beams with various shear-span to depth ratios

R. Li, H. Ni, R. S. Aboutaha

Research output: Chapter in Book/Entry/PoemConference contribution


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.

Original languageEnglish (US)
Title of host publicationRisk-Based Strategies for Bridge Maintenance
EditorsKhaled M. Mahmoud
PublisherCRC Press/Balkema
Number of pages8
ISBN (Print)9781032638232
StatePublished - 2023
Event11th New York City Bridge Conference, 2023 - New York City, United States
Duration: Aug 21 2023Aug 22 2023

Publication series

NameRisk-Based Strategies for Bridge Maintenance


Conference11th New York City Bridge Conference, 2023
Country/TerritoryUnited States
CityNew York City

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction


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