Modified bond model for shear in slabs under concentrated loads

Modified bond model for shear in slabs under concentrated loads

Lantsoght, E.O.L.
Van der Veen, C.
De Boer, A.

Civil Engineering and Geosciences

Structural Engineering

2015-05-18

Slabs subjected to concentrated loads close to supports, as occurring for truck loads on slab bridges, are less studied than beams in shear or slab-column connections in punching. To predict the shear capacity for this case, the Bond Model for concentric punching shear was studied initially. Modifications to this model resulted in the Modified Bond Model, which takes into account the enhanced capacity from the direct transfer of the load to the support, is able to deal with moment sign changes as occurring near continuous supports, and can take into account the reduction in capacity, resulting from the geometry when the load is placed close to the edge. The model is then compared to the results of experiments on slabs subjected to concentrated loads close to supports. As compared to the Eurocode and the ACI code, the Modified Bond Model leads to a significantly better prediction of the experimental results. The Modified Bond Model is one of the few models available to describe the shear capacity of slabs subjected to concentrated loads close to supports and can be used for design and assessment.

bridge engineering
concentrated loads
design
punching
shear
slabs

http://resolver.tudelft.nl/uuid:f1153242-f22b-472a-8c62-7bdda9433126

fib Symposium 2015: Concrete - Innovation and Design, Copenhagen, Denmark, 18-20 May 2015

Institutional Repository

conference paper

(c) 2015 The Author(s)