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

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.