Searched for: subject%3A%22punching%22
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Amir, S. (author), Van der Veen, C. (author), Walraven, J.C. (author)
In the Netherlands, there is a need to determine the capacity of bridge decks as a large number of them were built back in the 60’s and 70’s. Since then, not only a lot of additional safety requirements have been incorporated into the modern codes but the traffic flow has also increased drastically. The current research deals with this question...
conference paper 2012
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Stanier, S.A. (author), Hu, P. (author), Cassidy, M.J. (author)
This paper demonstrates the use of a geotechnical drum centrifuge in the calibration of a model to predict the peak punch-through penetration (qpeak) resistance of a spudcan on sand overlying clay. A series of loose sand overlying clay tests was performed and combined with an existing database of tests performed on dense sand overlying clay. The...
conference paper 2012
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Lantsoght, E.O.L. (author), Van der Veen, C. (author), De Boer, A. (author)
The shear problem is typically studied by testing small, heavily reinforced, slender beams subjected to concentrated loads, resulting in a beam shear failure, or by testing slab-column connections, resulting in a punching shear failure. Slabs subjected to concentrated loads close to supports, as occurring when truck loads are placed on slab...
conference paper 2014
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Lantsoght, E.O.L. (author), Van der Veen, C. (author), De Boer, A. (author)
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...
conference paper 2015
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Lantsoght, E.O.L. (author), Van der Veen, C. (author), Walraven, J.C. (author)
Existing solid slab bridges under a combination of wheel loads and distributed traffic loads sometimes do not fulfil the code requirements for shear. However, reinforced concrete slabs loaded close to the support are subjected to shear stresses which might result in a failure mode of combined punching and shear. This behaviour is studied in a...
conference paper 2013
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Van Hemert, P.H.A. (author), Fennis-Huijben, S.A.A.M. (author), Hordijk, D.A. (author)
A large number of concrete structures, that is built in the sixties and seventies of the twentieth century, need to be re-evaluated. It should be judged whether their capacity is still sufficient for the increased traffic loads. Acoustic emission (AE) is a non-destructive technique that can possibly be used to get a better insight in the...
conference paper 2014
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Amir, S. (author), Van der Veen, C. (author), Walraven, J.C. (author), De Boer, A. (author)
In the Netherlands, most of the bridges were built more than 50 years ago and it is essential for designers to find out if these bridges are safe for modern traffic especially in shear since that was not considered in design recommendations before 1976. Detailed experiments have been carried out in the laboratory to investigate punching shear...
conference paper 2014
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Lantsoght, E.O.L. (author), van der Veen, C. (author), de Boer, A. (author)
Most methods for the design and analysis of reinforced concrete slabs for punching are based on experiments on slab-column connections, reflecting the situation in building slabs. Slab-column connections with unbalanced<br/>moments have also been studied in the past. Experiments indicate that the accuracy of models for asymmetrically loaded...
conference paper 2017
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Lantsoght, E.O.L. (author), van der Veen, C. (author), Koekkoek, Rutger (author), Sliedrecht, Henk (author)
In The Netherlands, existing slab-between-girder bridges with prestressed girders and thin transversely prestressed concrete decks require assessment. The punching capacity was studied in a previous series of experiments, showing a higher capacity thanks to compressive membrane action in the deck. Then, concerns were raised with regard to...
conference paper 2021
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Amir, Sana (author), van der Veen, C. (author), Walraven, J.C. (author), de Boer, Ane (author)
A large number of bridges in the Netherlands have transversely post tensioned deck slabs cast in-situ between flanges of precast girders and were found to be critical in shear when evaluated by Eurocode 2. To investigate the bearing (punching shear) capacity of such bridges, a 1:2 scale bridge model was constructed in the laboratory and...
conference paper 2023
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de Sousa, Alex M.D. (author), Lantsoght, E.O.L. (author), Setiawan, Andri (author), El Debs, Mounir K. (author)
One-way slabs under concentrated loads may fail by one-way shear, punching, flexure or a mixed-mode between them. This study examines the benefits of using Linear Elastic Finite Element Analyses (LEFEA) combined with analytical expressions to predict the shear and punching capacities of such slabs. Besides, the determination of the most...
conference paper 2023
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Lantsoght, E.O.L. (author), Ospina, Carlos E. (author), Alexander, Scott D.B. (author)
In design, the sectional depth of reinforced concrete spread footings is usually governed by design code provisions for punching shear, which are derived primarily from experiments on slab-column connections. Previous experiments have shown that the punching behavior of concentrically loaded spread footings differs from that of slab-column...
conference paper 2023
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Alexander, S (author), Lantsoght, E.O.L. (author)
The arched strut is an addition to the strut-and-tie (STM) tool kit. It models the combination of disturbed behavior in one direction with slender behavior in the perpendicular direction. Common applications for the arched strut are in the design of connections between a reinforced concrete slab and its supporting columns or punching of bridge...
conference paper 2018
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Carrera, Bernardo (author), Lantsoght, E.O.L. (author), Alexander, Scott D.B. (author)
The strip model describes a load path prior to failure that can be tailored to a wide range of slabs under concentrated loads, both concentric and eccentric. Eccentric punching shear can occur in concrete slab-column connections subjected to shear and unbalanced moment, such as edge and corner columns. This paper shows how the strip model is...
conference paper 2022
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de Sousa, Alex Micael Dantas (author), Lantsoght, E.O.L. (author), Debs, Mounir Khalil El (author)
Reinforced concrete one-way slabs under concentrated loads can develop different shear failure mechanisms: as wide beams in one-way shear, punching shear around the load or a mixed mode between them. Until now, most publications presented recommendations to assess the shear capacity considering only the one-way shear failure mechanism. This...
journal article 2023
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Vargas, Daniel (author), Lantsoght, E.O.L. (author), Genikomsou, Aikaterini S. (author)
Eccentric punching shear can occur in concrete slab–column connections when the connection is subjected to shear and unbalanced moments. Unbalanced moments occur in all floor slabs at the edge and corner columns. As such, this problem is of practical relevance. However, most punching experiments in the literature deal with concentric punching...
journal article 2022
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Dantas de Sousaa, Alex Micael (author), Lantsoght, E.O.L. (author), de Lima Araújo, Daniel (author), Pereira Pradoe, Lisiane (author), Debs, Mounir Khalil El (author)
This study describes a set of recommendations to improve the precision of shear and punching shear capacity predictions for one-way slabs under concentrated loads, regardless of the governing failure mechanism, using the ABNT NBR 6118:2014 code provisions. For this purpose, a database of 143 test results was developed, including one-way slabs...
journal article 2023
document
de Sousa, Alex M.D. (author), Lantsoght, E.O.L. (author), El Debs, Mounir K. (author)
One-way slabs under concentrated loads may fail by one-way shear, two-way shear, flexure, or a combination of these modes. This paper reviews shear and punching shear-failure mechanisms of one-way slabs under concentrated loads tested from the literature and investigates the accuracy of different approaches to predict the ultimate capacity...
journal article 2023
document
de Sousa, Alex M.D. (author), Lantsoght, E.O.L. (author), El Debs, Mounir K. (author)
One-way slabs under concentrated loads may fail by one-way shear such as wide beams, punching shear, flexure, or by combining two or more of these mechanisms. Nevertheless, most publications have only addressed shear and punching failures without flexural reinforcement yielding. This study investigates the ultimate shear capacity of one-way...
journal article 2023
document
de Sousa, Alex M.D. (author), Lantsoght, E.O.L. (author), Genikomsou, Aikaterini S. (author), Prado, Lisiane P. (author), El Debs, Mounir K. (author)
Several studies investigated the precision of non-linear finite element analyses (NLFEA) to predict the shear capacity of beams or the punching capacity of slab-column connections. However, in the literature, there is little discussion regarding the results of NLFEA to predict the ultimate capacity and failure mechanism of slabs susceptible...
journal article 2023
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