Stratégie d’instrumentation pour la gestion optimisée des ouvrages portuaires

Abstract

Résumé:Le suivi et la requalification des structures de génie civil suppose d'acquérir des informations sur leur comportement sous forme d'inspections, de mesures ou d'instrumentation. Cet article présente les enjeux d'une stratégie d'instrumentation efficace sur une partie d'un parc de structures portuaires. On montre en particulier les différents niveaux de redondances nécessaires et les technologies disponibles. Abstract :The survey and reassessment of existing structures is still a great challenge for the decision makers. Decision aid tools are available and are based mostly on the understanding of the in-service behaviour of structures. This paper focuses of the optimal monitoring strategy for wharf where uncertainties on the in-service behaviour are significant. Technologies selection and information redundancy are presented as major criteria for facilities management.

Polynomial Chaos Representation for Identification of Mechanical Characteristics of Instrumented Structures

“…A monitoring strategy has been achieved, which aims to: (1) follow the global behavior of the wharf within the next 5 years after the construction to set up models for the prediction of the behavior evolution in time; (2) base the maintenance policy on a better understanding of the in‐service behavior; (3) find the main variables that influence the behavior; and (4) perform reliability analysis during extreme events (storms) for in‐service structures (Yáñez‐Godoy et al, 2006). A complete description of this strategy and its application to four wharfs is available in Schoefs et al (2004).…”

“…Note that the first step is needed because of the lack of knowledge on the earth pressure loading (Schoefs et al, 2004; Yáñez‐Godoy et al, 2008b). The deterministic value of k d is assumed to be 61.9 MN/m: it is a reasonable mean value because it corresponds to the stiffness of a tie‐rod perfectly embedded in the anchoring plate without surrounding soil.…”

“…(2) base the maintenance policy on a better understanding of the in-service behavior; (3) find the main variables that influence the behavior; and (4) perform reliability analysis during extreme events (storms) for in-service structures (Yáñez-Godoy et al, 2006). A complete description of this strategy and its application to four wharfs is available in Schoefs et al (2004).…”

Technical management of French harbour structures - Part 1: Description of built assets

“…This figure illustrates the inventiveness of engineers confronted 6.8 : Revue Paralia -n° 2 (2009) with the challenges of designing maritime structures; however it also means that owners are faced with delicate management decisions with regards to the principles of mechanical functioning and multiple failure modes. A part of the answer is in the monitoring (survey) of structures and the instrumentation of the more recent ones (DELATTRE & MESPOULHE, 1999;GATTERMANN et al, 2001;SCHOEFS et al, 2004;YANEZ-GODOY & SCHOEFS, 2006;YANEZ-GODOY et al, 2008), especially to re-evaluate their reliability (YANEZ-GODOY et al, 2006). This double level of heterogeneity (concept and material) is one of the issues that the GEROM project wishes to address.…”