Behaviour of reinforced-concrete flat slabs with stirrups under reversed horizontal cyclic loading

Abstract

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Deformation capacity evaluation for flat slab seismic design

“…One of the first works was conducted by Farhey et al (1993), who carried out experimental tests for cyclic loading on slab column connections, and subsequent tests on specimens repaired using steel plates (Farhey et al 1995). Later, several tests were carried out in Portugal to study slab-column connections with and without shear reinforcement (Almeida et al 2016(Almeida et al , 2020aIsufi et al 2019) and various longitudinal reinforcement ratios (Isufi et al 2021). Drakatos et al (2016) tested internal slab-column connections in full scale under monotonic and cyclic imposed rotations, investigating the drift capacity for different types of loading, gravity shear ratios and reinforcement ratios.…”

Behavior of RC flat slabs with shear bolts under reversed horizontal cyclic loading

“…This paper has the purpose of showing the efficiency of postinstalled bolts for shear strengthening of existing flat slabs in order to improve the seismic behavior of the structure. This is the continuation of the experimental works by the research team to study the seismic behavior of flat slab structures. All the tests conducted by the research team were performed in identical specimens under the same conditions.…”

Slab–column connection punching and ductility improvement methods for seismic response of buildings with flat slabs

“…Almeida et al 28 , 17 tested four specimens reinforced with stirrups around the column. Two shear reinforcement ratios were tested: one was achieved by using 16 vertical legs of diameter 4.5 mm per perimeter and a higher ratio was achieved by using eight legs of diameter 6 mm plus eight legs of diameter 8 mm.…”

“…The first tests were conducted on specimens without punching shear reinforcement, with varying gravity load. 26 Subsequently, tests on specimens reinforced with headed studs, 27 stirrups, 28 HSC, 29 FRC, 30 and strengthening with postinstalled bolts 17 were conducted. All these specimens had similar geometry, flexural reinforcement detailing, and quantity as well as a comparable ratio between the applied gravity load and the concentric punching shear resistance (gravity shear ratio [GSR]).…”