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Theses

Behavior of structures subjected to differential settlements: Taking uncertainties into consideration

Abstract : The objective of this thesis is to study the behavior of structures subjected to differential settlement, taking into consideration different sources of uncertainties. Ground movements may have different “sources” (origins), such as the influence of nearby excavations (tunnels), and the presence of underground voids (mining subsidence, sinkhole, etc.). These sources will induce the settlement of soil and its displacement. The soil settlement produced by the ground movements will affect the nearby structure, which will cause the structure movement and its possible damage. This thesis, presented in “papers’ form” has the intention of evaluating the influence of uncertainties based on analytical, numerical and experimental approaches. At first, this study starts by developing an analytical model to study the effect of some important variabilities/uncertainties (soil profile deformation form, soil behavior (elastic/elastoplastic), variability of building stiffness, etc.). Then, a numerical model is developed in order to confirm some particular results given by the analytical model. Finally, an experimental model is dedicated to characterize one important uncertainty in particular, the variability of the structure stiffness, and to study its influence on the transmission of the ground movement. The main results are the evaluation of confidence intervals that consider the effect of these uncertainties on the structure response affecting the soil-structure interaction (SSI) phenomenon, and the development of a methodology to quantify the impact of uncertainties on the estimation of the deflection transmission rate.
Document type :
Theses
File URL :
http://docnum.univ-lorraine.fr/ulprive/DDOC_T_2020_0007_EL_KAHI.pdf
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https://hal.univ-lorraine.fr/tel-02559589
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Submitted on : Thursday, April 30, 2020 - 3:34:36 PM
Last modification on : Wednesday, November 4, 2020 - 1:56:03 PM

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  • HAL Id : tel-02559589, version 1

Citation

Elio El Kahi. Behavior of structures subjected to differential settlements: Taking uncertainties into consideration. Civil Engineering. Université de Lorraine; Université libanaise, 2020. English. ⟨NNT : 2020LORR0007⟩. ⟨tel-02559589⟩

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