Anchorage behavior of Fe-SMA rebars Post-Installed into concrete
نویسندگان
چکیده
The unique self-prestressing behavior exhibited by Iron-based shape memory alloys (Fe-SMAs) coupled with the ease of application makes them suitable for numerous structural applications requiring post-installed reinforcement. However, practical realization Fe-SMA rebars as reinforcement systems entails an understanding their bond concrete to ensure use adequate anchorage length prestress transfer and prevention premature failure. cast-in-place near-surface mounted has been investigated in detail a few recent studies. no study so far into concrete. To address this important knowledge gap, paper presents extensive experimental campaign aimed at evaluating comprised 23 specimens, variable parameters including length, state rebar (non-activated or activated), drill-hole size, strength adjacent concrete, type (plain, threaded, deformed), loading history (monotonic cyclic). results showed that lengths ≥ 5db, ribbed primarily fail pull-out failure mode exhibit large inelastic strains load capacity is concluded comparison predictions conventional design models current testing campaign. demonstrates recommendations existing standards are generally conservative rebars.
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ژورنال
عنوان ژورنال: Engineering Structures
سال: 2022
ISSN: ['0141-0296', '1873-7323']
DOI: https://doi.org/10.1016/j.engstruct.2022.114960