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Computers and Concrete
  Volume 12, Number 4, October 2013, pages 413-429
DOI: http://dx.doi.org/10.12989/cac.2013.12.4.413
 


Nonlinear finite element modeling of FRP-wrapped UHPC columns
Soner Guler and Alperen Çopur and Metin Aydogan

 
Abstract
    The primary aim of this study is to develop a three dimensional finite element (FE) model to predict the axial stress-strain relationship and ultimate strength of the FRP-wrapped UHPC columns by comparing experimental results. The reliability of four selected confinement models and three design codes such as ACI-440, CSA-S806-02, and ISIS CANADA is also evaluated in terms of agreement with the experimental results. Totally 6 unconfined and 36 different types of the FRP-wrapped UHPC columns are tested under monotonic axial compression. The values of ultimate strengths of FRP-wrapped UHPC columns obtained from the experimental results are compared and verified with finite element (FE) analysis results and the design codes mentioned above. The concrete damage plasticity model (CDPM) in Abaqus is utilized to represent the confined behavior of the UHPC. The results indicate that agreement between the test results and the non-linear FE analysis results is highly satisfactory. The CSA-S806-02 design code is considered more reliable than the ACI-440 and the ISIS CANADA design codes to calculate the ultimate strength of the FRP-wrapped UHPC columns. None of the selected confinement models that are developed for FRP-wrapped low and normal strength concrete columns can safely predict the ultimate strength of FRP-wrapped UHPC columns.
 
Key Words
    ultra-high performance concrete; fiber reinforced polymer; finite element analysis; ultimate strength; design codes
 
Address
Soner Guler and Alperen Çopur and Metin Aydogan: Faculty of Civil Engineering, Istanbul Technical University, 34469, Istanbul, Turkey
 

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