Flexural behaviors assessment of Hidden boundary Rib precast concrete Slab (HRS) with bi-tensional prestress: Experiments, analyses, and formulations

This study presents overviews of a first proposed Hidden boundary one-way Rib precast concrete Slab, so-called HRS. In order to investigate bending behaviors of the novel structural system, three specimens manufactured in factory are tested by corresponding static loading protocol experiments. Four-points bending tests in both cases of the presence and absence of topping concrete slabs are performed. Results of the experiment scrutinize how each structural component such as rebars, topping concretes, strand wires can affect the bending behavior of HRS. As regards the main originality of this paper, approximate equations showing flexural strengths for a partially prestressed concrete flagged section, like HRS, are proposed in accordance with several current global and local design standards such as ACI 318, EN: Eurocode 2, PCI, AASHTO 2002, KCI 2012 and CSA A.23. Moreover, this study provides another predicting approach using finite element analysis of MIDAS FEA for analytical performances of specimens. Through these experimental and analytical results, the general characteristic of HRS may be observed and studied for realization in the field of prestressed precast concrete industries for construction.