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Structural Monitoring and Maintenance
  Volume 6, Number 4, December 2019, pages 269-289
open access

Behavior of reinforced concrete segmental hollow core slabs ‎under monotonic and repeated loadings
Ibrahim N. Najm, Raid A. Daud and Adel A. Al-Azzawi

    This study investigated experimentally the response of thick reinforced concrete specimens having hollow cores with ‎critical parameters. The investigation includes testing of twelve specimens that are solid and hollow-core slab models. ‎Each specimen consists of two pieces, the piece dimensions are (1.2 m) length, (0.3 m) width and (20 cm) thickness tested ‎under both monotonic and repeated loading. The test program is carried out to study the effects of load type, core ‎diameters, core shape, number of cores, and steel fiber existence. Load versus deflection at mid span, failure modes, and ‎crack patterns were obtained during the test. The test results showed that core shape and core number has remarkable ‎influenced on cracking pattern, ultimate load, and failure mode. Also, when considering repeated loading protocol, the ‎ultimate load capacity, load at yielding, and ductility is reduced.
Key Words
    monotonic load; repeated load; reinforced concrete; hollow-core slab
Ibrahim N. Najm, Raid A. Daud and Adel A. Al-Azzawi: Civil Engineering Department, College of Engineering, Al-Nahrain University, Baghdad

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