Transition from One-way to Two-way Shear by Coupling LEFEA and the CSCT Models

Alex Sousa, E.O.L. Lantsoght, Andri D. Setiawan, Mounir K. El Debs

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


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 nonuniform 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: New Trends for Eco-Efficiency and Performance
PublisherInternation Federation for Structural Concrete (fib)
Number of pages10
Publication statusPublished - 2021
Event FIB symposium 2021 Concrete Structures: New Trends for Eco-Efficiency and Performance - Vitrual event
Duration: 14 Jun 202116 Jun 2021


Conference FIB symposium 2021 Concrete Structures
Internet address


  • Critical Shear Crack Theory (CSCT)
  • Linear Elastic Finite Element Analyses (LEFEA)
  • one-way shear
  • two-way shear
  • transitional failure mode


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