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Hdr Année : 2016

CONTRIBUTION TO STRUCTURAL VULNERABILITY QUANTIFICATION

Résumé

This memoir is the synthesis of research activities I have conducted over the past decade aiming at improving the numerical description of some dissipative mechanisms at the material scale and quantifying the vulnerability of reinforced concrete structures. The main objectives of the research presented in this dissertation are: (i) to improve both the predictive capabilities and the numerical robustness of the time integration strategies of the continuous constitutive model when dealing with the cyclic behavior of quasi-brittle materials subjected to either long-term or short-term loadings, (ii) to improve numerical techniques capable of describing the discontinuous nature of cracking and related local dissipative phenomena, and (iii) to contribute to the definition of large-scale experimental campaigns and to organize international workshops aiming to better understand the complex behavior of reinforced concrete structures when subjected to extreme loadings, such as earthquakes. In the first part, we focus on the development and validation of a continuous constitutive model to describe the mechanical behavior of quasi-brittle materials subjected to cyclic loadings. Simplified strategies are also derived from full three-dimensional approaches to serve probabilistic techniques aiming at taking into account uncertainties and updating mechanical models. In the second part, some light is shed on some developments aiming at better quantifying the cracking features. Then, the results of experiments designed to assess the dynamic response of strongly asymmetric reinforced concrete structures are presented. The experimental data have led to numerical studies shared with the international scientific community. The lessons learned from this research is then employed to design research projects we plan to work on over the next few years.
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Dates et versions

tel-01403733 , version 1 (27-11-2016)

Identifiants

  • HAL Id : tel-01403733 , version 1

Citer

Benjamin Richard. CONTRIBUTION TO STRUCTURAL VULNERABILITY QUANTIFICATION: FROM THE REPRESENTATIVE VOLUME ELEMENT TO THE MEMBER SCALE. Mechanics of materials [physics.class-ph]. Université Paris Saclay, 2016. ⟨tel-01403733⟩
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