Crack Propagation for Concrete Flat Plates Using XFEM Method

Rwayda Al Hamd, Martin Gillie, Yong Wang, Asad Albostami

    Research output: Contribution to conferencePaperpeer-review

    Abstract

    Flat plate concrete structures are easy to construct and cheap to build. However, they are susceptible to a type of brittle failure known as
    “punching

    shear”,
    where columns punch through the floor leading to progressive collapse. This is a particularly dangerous type of failure as it occurs suddenly and without warning. A finite element model was developed and validated based on the
    author’s
    previous tests for a square slab with a single column stub. This arrangement simulates the type of column to slab arrangement found in many office buildings. The failure mechanics were examined and the model gave a good agreement with the experimental results identifying the correct crack pattern and the failure loads. A 2-d axisymmetric model was then developed representing a circular column to model the punching crack propagation in detail. This was done using the extended finite element method (XFEM). The XFEM results showed the good agreement between crack location and areas of highest principal strain and were able to capture crack propagation and the effect this has on the stress state under punching failure. It is concluded that explicit modelling of fracture is beneficial in order to capture the full response of the slab and that continuum models are insufficient to do this
    Original languageEnglish
    Pages1-7
    Number of pages7
    DOIs
    Publication statusPublished - 2016
    Event9th International Conference on Fracture Mechanics of Concrete and Concrete Structures FraMCoS-9 - Berkeley, United States
    Duration: 29 May 20161 Jun 2016

    Conference

    Conference9th International Conference on Fracture Mechanics of Concrete and Concrete Structures FraMCoS-9
    Country/TerritoryUnited States
    Period29/05/161/06/16

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