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Behavior of reinforced concrete segmental hollow core slabs under monotonic and repeated loadings

  • Najm, Ibrahim N. (Civil Engineering Department, College of Engineering, Al-Nahrain University) ;
  • Daud, Raid A. (Civil Engineering Department, College of Engineering, Al-Nahrain University) ;
  • Al-Azzawi, Adel A. (Civil Engineering Department, College of Engineering, Al-Nahrain University)
  • Received : 2019.07.09
  • Accepted : 2019.12.02
  • Published : 2019.12.25
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Abstract

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.

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