Transition from one-way to two-way shear by coupling lefea and the csct models

Alex de Sousa, Eva Lantsoght, Andri Setiawan, Mounir El Debs

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Bridge deck slabs without shear reinforcement under concentrated loads close to line supports may develop different shear failure modes: (i) one-way shear by shear-compression or flexure-shear failure mechanisms and (ii) two-way shear or punching shear under asymmetrical loading conditions. Notably, most publications concentrate on one of the failure modes and do not delve into the transition between these failure modes. This study proposes to discuss the level of precision of the Critical Shear Crack Theory (CSCT) to predict the shear capacity of slabs subjected to transitional failure modes in shear due to asymmetrical load or support conditions. For this purpose, the CSCT models of one-way shear and two-way shear are coupled with Linear Elastic Finite Element Analyses (LEFEA) to evaluate the non-uniform distribution of shear forces and bending moments around the loaded area and on the control sections used. The use of LEFEA aids in understanding the change of failure modes according to parameters such as the member width to effective depth ratio and the shear span. The results indicate that the CSCT coupled with LEFEA allows for accurate predictions of the shear and punching shear capacity of slabs according to the governing failure mode of the tests.

Original languageEnglish
Title of host publicationConcrete Structures
Subtitle of host publicationNew Trends for Eco-Efficiency and Performance - Proceedings of the fib Symposium 2021
EditorsEduardo Julio, Jonatas Valenca, Ana Sofia Louro
Publisherfib. The International Federation for Structural Concrete
Pages1710-1719
Number of pages10
ISBN (Electronic)9782940643080
StatePublished - 2021
Event2021 fib Symposium of Concrete Structures: New Trends for Eco-Efficiency and Performance - Virtual, Lisbon, Portugal
Duration: 14 Jun 202116 Jun 2021

Publication series

Namefib Symposium
Volume2021-June
ISSN (Print)2617-4820

Conference

Conference2021 fib Symposium of Concrete Structures: New Trends for Eco-Efficiency and Performance
Country/TerritoryPortugal
CityVirtual, Lisbon
Period14/06/2116/06/21

Keywords

  • Critical Shear Crack Theory (CSCT)
  • Linear Elastic Finite Element Analyses (LEFEA)
  • One-way shear
  • Transitional failure mode
  • Two-way shear

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