Shear tests of reinforced concrete slabs and slab strips under concentrated loads

Abstract:

In slabs subjected to concentrated loads, the shear strength checks are conducted for two limit states: 1) shear over an effective width, and 2) punching shear on a perimeter around the point Joad. In current practice, the shear strength at the supports is determined with models that do not consider the transverse bkp_redistribution of Joad that occurs in slabs, which results in underpbkp_redictions for the actual slab shear capacity. Currently, an experimental program is being conducted at Delft University of Technology to determine the shear capacity of slabs under point loads near to the support. This paper presents the results of the tests conducted in continuous slabs and slab strips. In addition to studying the influence of the slab width, the specimens are tested with two types of reinforcement (ribbed and plain bars). The results of the experiments are compared to strength pbkp_redictions from current design models. Also, recommendations for the support effective width and an enhancement factor for considering the effect of transverse load bkp_redistribution are given.

Año de publicación:

2012

Keywords:

Fuente:

scopus