Experimental and numerical investigation of the effect of size in post-Tensioned concrete deck slabs

Sana Amir, Cor Van Der Veen, Ane De Boer

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

Abstract

It is widely known that as the structure of the size increases, its nominal strength decreases. In this paper, the effect of size on punching shear has been quantified for transversely post-Tensioned deck slabs cast between flanges of precast concrete girders. A 1:2 scaled model of the bridge was constructed in the laboratory, and experimental and numerical analyses were carried out. However, in order to apply these results on a real bridge, simply using the geometrical scale factors is not sufficient and a structural size effect has to be taken into account. Since a full-scale experimental study was not possible due to the costs involved, a numerical approach using finite element analysis software package TNO DIANA was used to model both the prototype and the real bridge, and a comparison was made to estimate the effect of size on the bearing capacity. It was found that increasing the transverse prestressing level had a positive effect on the punching shear strength of the deck slab. Furthermore, a lower size effect was observed with higher transverse prestressing levels. It is concluded that if a suitable size factor is used, either numerical or small-scale experimental studies can be reasonably used to investigate existing structures.

Original languageEnglish
Title of host publicationProceedings of International Structural Engineering and Construction
Subtitle of host publicationHolistic Overview of Structural Design and Construction
EditorsY. Vacanas, C. Danezis, A. Singh, S. Yazdani
PublisherISEC Press
Number of pages6
Volume7
DOIs
Publication statusPublished - 2020
Event3rd European and Mediterranean Structural Engineering and Construction Conference 2020, Euro-Med-Sec 2020 - Limassol, Cyprus
Duration: 3 Aug 20208 Aug 2020

Publication series

NameProceedings of International Structural Engineering and Construction
Number1
Volume7
ISSN (Print)2644-108X

Conference

Conference3rd European and Mediterranean Structural Engineering and Construction Conference 2020, Euro-Med-Sec 2020
CountryCyprus
CityLimassol
Period3/08/208/08/20

Keywords

  • Bearing capacity
  • Numerical modeling
  • Punching shear
  • Scale factor
  • TNO DIANA
  • Transverse prestressing level

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