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Push-over bending and shear behavior assessments of hidden boundary void precast concrete slab with bi-tensional prestress

  • Received : 2019.08.20
  • Accepted : 2021.02.18
  • Published : 2021.06.25
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Abstract

This paper presents a first proposed real-sized Hidden boundary Void precast concrete Slab, a so-called HVS. In order to assess and investigate push-over behaviors of the novel structural system, five types of real size specimens manufactured in factory are tested by corresponding static loading protocol experiments. Bending tests along with shear tests in both cases of presence and absence of topping concrete slabs are performed. Besides, composite slabs, which are two half-unit products connected by steel plates and U-bolts in the long edges, are surveyed to assess uniform characteristics of slab systems. Simultaneously, estimating calculations are proposed for the structural bearing capacity of partially prestressed concrete flagged sections. Proposed equations are developed according to provisions of several current global and local design standards. Moreover, this study provides another predicting approach using finite element analysis of MIDAS FEA for analytical performances of specimens. Thanks to these experimental and analytical results, the general characteristic of HVS may be observed, and then studied for realization in the field of prestressed precast concrete industries for construction.

Keywords

Acknowledgement

This research is sincerely supported by IS Dongseo research project and a grant (NRF-2017R1A4A1015660) of NRF in South Korea in 2018. Sincerely we appreciate for the support.

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