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

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

Lantsoght, E.O.L.

Civil Engineering and Geosciences

Structural Engineering

2012-05-24

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 load. In current practice, the shear strength at the supports is determined with models that do not consider the transverse redistribution of load that occurs in slabs, which results in underpredictions 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 predictions from current design models. Also, recommendations for the support effective width and an enhancement factor for considering the effect of transverse load redistribution are given.

http://resolver.tudelft.nl/uuid:be5bac46-fcbb-4e0b-86be-0f22a2b6c87d

KIT Scientific Publishing

978-3-386644-858-2

Proceedings of the 9th fib International PhD symposium in Civil Engineering, Karlsruhe, Germany, 22-25 July 2012

Institutional Repository

conference paper

(c) 2012 (c) 2012 Creative Commons BY NC ND