<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The bearing capacity of RC overhangs under concentrated loads can be dependent on the width of the slab. The goal of this paper is to investigate the effect of different widths using tests from the literature and non-linear FE-simulations as a reference. Shear force redistributions along the loading process and the shear concrete capacity are analysed. The shear effective width and the influence of an edge beam are also addressed. The results show that the bearing capacity of RC overhangs increase with the width until a transition area is reached and the increase flattens. An increased shear distribution sideways and posterior redistributions under the loading process are enabled. The shear capacity of concrete increases with the width and for loads close to the root an arch effect is observed. The edge beam contributes to a further increase of the ultimate capacity for wide enough overhangs. The effect of the width and the edge beam is not only quantitative but also qualitative since the failure mode and the critical section are influenced. Existing formulation for shear effective widths should be revisited. Experimental tests used for this purpose should consider wide enough specimens to capture the real behaviour of a bridge overhang slab.</p></abstract>

The bearing capacity of RC overhangs under concentrated loads can be dependent on the width of the slab. The goal of this paper is to investigate the effect of different widths using tests from the literature and non-linear FE-simulations as a reference. Shear force redistributions along the loading process and the shear concrete capacity are analysed. The shear effective width and the influence of an edge beam are also addressed. The results show that the bearing capacity of RC overhangs increase with the width until a transition area is reached and the increase flattens. An increased shear distribution sideways and posterior redistributions under the loading process are enabled. The shear capacity of concrete increases with the width and for loads close to the root an arch effect is observed. The edge beam contributes to a further increase of the ultimate capacity for wide enough overhangs. The effect of the width and the edge beam is not only quantitative but also qualitative since the failure mode and the critical section are influenced. Existing formulation for shear effective widths should be revisited. Experimental tests used for this purpose should consider wide enough specimens to capture the real behaviour of a bridge overhang slab.

Width and Edge Beam Effects on the Ultimate Behaviour of RC Bridge Overhangs

Division of Structural Engineering and Bridges, KTH Royal Institute of Technology

Nordic Concrete Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Width and Edge Beam Effects on the Ultimate Behaviour of RC Bridge Overhangs"}

The bearing capacity of RC overhangs under concentrated loads can be dependent on the width of the slab. The goal of this paper is to investigate the effect of...

Width and Edge Beam Effects on the Ultimate Behaviour of RC Bridge Overhangs

Published Online: Dec 31, 2019

Page range: 131 - 152

Received: Sep 15, 2019

Accepted: Dec 20, 2019

DOI: https://doi.org/10.2478/ncr-2019-0015

Keywords
Overhang slab, Bearing capacity, Width, Edge beam, Shear force, FE-modelling

© 2019 José Javier Veganzones et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Width and Edge Beam Effects on the Ultimate Behaviour of RC Bridge Overhangs

Published Online: Dec 31, 2019

Page range: 131 - 152

Received: Sep 15, 2019

Accepted: Dec 20, 2019

DOI: https://doi.org/10.2478/ncr-2019-0015

KeywordsOverhang slab, Bearing capacity, Width, Edge beam, Shear force, FE-modelling

© 2019 José Javier Veganzones et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Overhang slab, Bearing capacity, Width, Edge beam, Shear force, FE-modelling