Punching shear in prestressed concrete deck slabs: a comprehensive study

Sana Amir, Cor van der Veen, Joost C. Walraven, Ane de Boer

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

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 static tests were performed by varying the transverse prestressing level (TPL). A 3D solid, 1:2 scale model of the real bridge, similar to the experimental model, was developed in the finite element software DIANA and several nonlinear analyses were carried out. It was observed that the experimental and numerical ultimate load carrying capacity was much higher than predicted by the governing codes due to lack of consideration of compressive membrane action (CMA). In order to incorporate CMA in the Model Code 2010 (fib 2012) punching shear provisions for prestressed slabs, numerical and theoretical approaches were combined. As a result, sufficient factor of safety was observed when the real bridge design capacity was compared with the design wheel load of Eurocode 1. It was concluded that the existing bridges still had sufficient residual bearing capacity with no problems of serviceability and structural safety.

Original languageEnglish
Title of host publicationPunching Shear of Concrete Slabs
Subtitle of host publicationInsights from New Materials, Tests, and Analysis Methods
EditorsAikaterini Genikomsou, Trevor Hrynyk, Eva Lantsoght
PublisherAmerican Concrete Institute
Pages160-186
Number of pages27
ISBN (Electronic)9781641952125
DOIs
Publication statusPublished - 2023
EventPunching Shear of Concrete Slabs: Insights from New Materials, Tests, and Analysis Methods at the ACI Spring Convention 2023 - San Francisco, United States
Duration: 2 Apr 20236 Apr 2023

Publication series

NameAmerican Concrete Institute, ACI Special Publication
VolumeSP-357
ISSN (Print)0193-2527

Conference

ConferencePunching Shear of Concrete Slabs: Insights from New Materials, Tests, and Analysis Methods at the ACI Spring Convention 2023
Country/TerritoryUnited States
CitySan Francisco
Period2/04/236/04/23

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Compressive Membrane Action
  • Concrete
  • Deck slab
  • Punching shear
  • Transverse prestressing
  • Wheel loads

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