Meta-Models For The Assessment Of Soil Stochastic Properties From Monitoring: Application To Harbour Structures
Résumé
Since several decades, quite a lot of structures have been monitored to analyze their displacement during the works or during the service-life. Generally only deterministic measurements of some locations in the structure or the soil are considered. In some cases, we can get more information: When several sensors are placed in similar sections of the structure; when the loading is deterministic and the short term condition of the soil can be measured during this loading. In both cases the probabilistic characterization of soil parameters can be performed once both the structural model and measurements is considered as sufficiently accurate. The paper considers the monitoring of wharves for illustrating the behaviour of complex wharves when loading and soil parameters are random; here tie-rods are instrumented. The modelling is performed though a meta-model fitted on a numerical database obtained from direct simulations on a complex finite element model under Plaxis software: a quadratic Response Surface Model (RSM). This first contribution allows developing an inverse analysis and identifying soil characteristics.
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