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Coupled Systems Mechanics Volume 4, Number 4, December 2015 , pages 337-364 DOI: https://doi.org/10.12989/csm.2015.4.4.337 |
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Plasticity-damage model parameters identification for structural connections |
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Ismar Imamovic, Adnan Ibrahimbegovic, Catherine Knopf-Lenoir and Esad Mesic
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| Abstract | ||
| In this paper we present methodology for parameters identification of constitutive model which is able to present behavior of a connection between two members in a structure. Such a constitutive model for frame connections can be cast in the most general form of the Timoshenko beam, which can present three failure modes. The first failure mode pertains to the bending in connection, which is defined as coupled plasticity-damage model with nonlinear softening. The second failure mode is seeking to capture the shearing of connection, which is defined as plasticity with linear hardening and nonlinear softening. The third failure mode pertains to the diffuse failure in the members; excluding it leads to linear elastic constitutive law. Theoretical formulation of this Timoshenko beam model and its finite element implementation are presented in the second section. The parameter identification procedure that will allow us to define eighteen unknown parameters is given in Section 3. The proposed methodology splits identification in three phases, with all details presented in Section 4 through three different examples. We also present the real experimental results. The conclusions are stated in the last section of the paper. | ||
| Key Words | ||
| identification; connection; coupled plasticity-damage; Euler-Bernoulli and Timoshenko beam | ||
| Address | ||
| Ismar Imamovic: Laboratoire Roberval, Université de Technologie de Compiègne / Sorbonne Universités, France; Faculty of Civil Engineering, University Sarajevo, Sarajevo, Bosnia and Herzegovina Adnan Ibrahimbegovic and Catherine Knopf-Lenoir: Laboratoire Roberval, Université de Technologie de Compiègne / Sorbonne Universités, France Esad Mesic: Faculty of Civil Engineering, University Sarajevo, Sarajevo, Bosnia and Herzegovina | ||
