Simulation of crack spacing using a reinforced concrete model with an internal length parameter |
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| Authors: | J Pamin R de Borst |
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| Institution: | (1) Faculty of Civil Engineering, Cracow University of Technology, Warszawska 24, PL-31-115 Kraków, Poland, PL;(2) Koiter Institute Delft/Faculty of Civil Engineering, Delft University of Technology, P.O. Box 5048, NL-2600 GA Delft, The Netherlands, NL |
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| Abstract: | Summary A gradient-enhanced smeared crack model and bond-slip interface elements are utilized in finite element simulations of reinforced
concrete. The crack model is rooted in an enhanced plasticity theory. It uses the Rankine failure surface dependent on an
equivalent inelastic strain measure as well as on its Laplacian. As a result, finitely sized fracture process zones and realistic
crack spacings are obtained. A reinforced concrete bar in uniaxial tension is analyzed to demonstrate the regularizing influence
of the internal length parameter in the model and to evaluate the influence of the model parameters on the energy dissipation
in multiple cracks. A comparison of numerical simulations with experimental results for a beam without shear reinforcement
in four-point bending concludes the analysis.
Received 4 November 1997; accepted for publication 23 April 1998 |
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| Keywords: | higher-order continuum finite element analysis fracture localization reinforced concrete crack spacing |
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