L’interculturalité au sein des acteurs culturels : Articulations entre culture scientifique et lecture publique: Etude sur la place des sciences en général et du livre scientifique en particulier au sein des bibliothèques

Rapport sur la place du livre de science et de la science dans les bibliothèques de lecture publique. L'étude conduite établit différents constats et propose des pistes d'évolution

Fiber optic civil structure monitoring system

A civil structure monitoring system based on fiber Bragg grating technology is presented. A complete set of new transducers, both for concrete and steel monitoring, is designed, fabricated, and successfully checked both in laboratory and in-field conditions

Interculturalité au sein des acteurs culturels : articulations entre culture scientifique et lecture publique - Rapport (L\u27)

Rapport sur la place du livre de science et de la science dans les bibliothèques de lecture publique. L\u27étude conduite établit différents constats et propose des pistes d\u27évolution

Stochastic wind-load model for building vibration estimation using large-eddy cfd simulation and random turbulenc flow generation algorithms

The application of computer fluid dynamics to the estimation of a stochastic wind loading model for vibration analysis of flexible buildings is studied in this paper. Large-Eddy-Simulation with random turbulence field as inflow boundary condition is used for estimating along the wind forces, across the wind forces and torsional moments along the height of the building. The stochastic turbulence of the inlet flow is modeled using techniques proposed in the literature and variations suggested by the authors, and along the wind and along the wind forces and torsional moments applied along the building height are estimated with sampled random processes resulting from the CFD analyses. The application of this numerical technique during the design stage of a concrete-wall 36-storey building with a parallelogram-shape plan is described. This structure is prone to high floor accelerations due to wind loading, compromising occupant comfort. The construction of random loading models for this building considering time and space correlation of forces and torsional moments is discussed and the use of the random loading to the design process of supplemental damping devices for the building is described.Publicado en: Mecánica Computacional vol. XXXV, no. 12Facultad de Ingenierí

Stochastic wind-load model for building vibration estimation using large-eddy cfd simulation and random turbulenc flow generation algorithms

The application of computer fluid dynamics to the estimation of a stochastic wind loading model for vibration analysis of flexible buildings is studied in this paper. Large-Eddy-Simulation with random turbulence field as inflow boundary condition is used for estimating along the wind forces, across the wind forces and torsional moments along the height of the building. The stochastic turbulence of the inlet flow is modeled using techniques proposed in the literature and variations suggested by the authors, and along the wind and along the wind forces and torsional moments applied along the building height are estimated with sampled random processes resulting from the CFD analyses. The application of this numerical technique during the design stage of a concrete-wall 36-storey building with a parallelogram-shape plan is described. This structure is prone to high floor accelerations due to wind loading, compromising occupant comfort. The construction of random loading models for this building considering time and space correlation of forces and torsional moments is discussed and the use of the random loading to the design process of supplemental damping devices for the building is described.Publicado en: Mecánica Computacional vol. XXXV, no. 12Facultad de Ingenierí

Stochastic wind-load model for building vibration estimation using large-eddy cfd simulation and random turbulenc flow generation algorithms

The application of computer fluid dynamics to the estimation of a stochastic wind loading model for vibration analysis of flexible buildings is studied in this paper. Large-Eddy-Simulation with random turbulence field as inflow boundary condition is used for estimating along the wind forces, across the wind forces and torsional moments along the height of the building. The stochastic turbulence of the inlet flow is modeled using techniques proposed in the literature and variations suggested by the authors, and along the wind and along the wind forces and torsional moments applied along the building height are estimated with sampled random processes resulting from the CFD analyses. The application of this numerical technique during the design stage of a concrete-wall 36-storey building with a parallelogram-shape plan is described. This structure is prone to high floor accelerations due to wind loading, compromising occupant comfort. The construction of random loading models for this building considering time and space correlation of forces and torsional moments is discussed and the use of the random loading to the design process of supplemental damping devices for the building is described.Publicado en: Mecánica Computacional vol. XXXV, no. 12Facultad de Ingenierí

Control activo de estructuras con aislamiento de base

En este artículo se propone un sistema de control activo como protección antisismica suplementaria para edificios con aislamiento de base y se analiza su viabilidad de forma numérica. Se considera una única fuerza de control actuando al nivel de la planta inferior. El algoritmo de control se basa en la estrategia de control predictivo, formulada para tener en cuenta el problema del tiempo de retardo en los actuadores. Los resultados obtenidos muestran que es posible lograr una reducción de las aceleraciones absolutas notablemente superior a la que se alcanza con el efecto pasivo del sistema de aislamiento de base. Ello puede ser útil en edificios que alberguen equipos especialmente sensibles.Peer Reviewe

Nonlinear viscous damping and tuned mass damper design for occupant comfort in flexible tall buildings subjected to wind loading

During wind events, tall buildings may exhibit floor accelerations levels that compromise occupant comfort. The use of energy dissipating devices to reduce peak floor accelerations is a sound strategy to improve building performance. The estimation of mean peak floor accelerations of a steel-frame building subjected to random wind forces and the design procedure of supplemental nonlinear viscous dampers to improve occupant comfort in one-year recurrence wind events are described in this paper. A stochastic wind load model is developed to estimate acceleration performance; drag, lift and torsional moments at each story are defined as random stationary processes by the definition of their cross-spectral density matrix. Wind tunnel results and computational fluid dynamic analyses are used to fine-tune the stochastic load models. Reduced-order structural models of the tower are developed to estimate the frequency response function from floor loadings to floor accelerations at corners points of the buildings. Statistical linearization is used to estimate the performance of the buildings with non-linear viscous dampers installed in different configurations. Floor acceleration reductions achieved with supplemental viscous dampers and a tuned mass damper are evaluated to comply with occupant performance standards.Publicado en: Mecánica Computacional vol. XXXV, no. 12Facultad de Ingenierí

Nonlinear viscous damping and tuned mass damper design for occupant comfort in flexible tall buildings subjected to wind loading

During wind events, tall buildings may exhibit floor accelerations levels that compromise occupant comfort. The use of energy dissipating devices to reduce peak floor accelerations is a sound strategy to improve building performance. The estimation of mean peak floor accelerations of a steel-frame building subjected to random wind forces and the design procedure of supplemental nonlinear viscous dampers to improve occupant comfort in one-year recurrence wind events are described in this paper. A stochastic wind load model is developed to estimate acceleration performance; drag, lift and torsional moments at each story are defined as random stationary processes by the definition of their cross-spectral density matrix. Wind tunnel results and computational fluid dynamic analyses are used to fine-tune the stochastic load models. Reduced-order structural models of the tower are developed to estimate the frequency response function from floor loadings to floor accelerations at corners points of the buildings. Statistical linearization is used to estimate the performance of the buildings with non-linear viscous dampers installed in different configurations. Floor acceleration reductions achieved with supplemental viscous dampers and a tuned mass damper are evaluated to comply with occupant performance standards.Publicado en: Mecánica Computacional vol. XXXV, no. 12Facultad de Ingenierí