Papers

This paper focuses on studying the dynamic behaviour of large dams over time, including identification of modal parameters (naturalfrequencies, modal damping ratios and mode shapes) and seismic response analysis, based on measured acceleration time histories.A comparison between experimental results obtained from continuous vibration monitoring data and numerical modelling results from 3DFE models is presented. The aim is to emphasize the interest of combining the use of recorded data from continuous dynamic monitoringsystems and of numerical modelling software for seismic and structural health monitoring of dams.

Neste artigo, que, de certa forma, antecipa a conclusão de uma ampla reflexão sobre o que se designou como o "Habitar e Viver Melhor", uma designação que, aliás, dá título a uma série editorial da Infohabitar, depois de uma introdução ao que podemos considerar como uma inovação coerente e consistente no espaço doméstico, aborda-se e comenta-se um amplo leque de características de originalidade doméstica e conclui-se a reflexão com um exercício idêntico sobre as características de apropriação e inovação domésticas.

Fluid-dynamic interference among cylindrical structures in arrays, frequently used in engineering, is of fundamental and practical interests since it may considerably change fluid-structure interactions and produce large fluctuating forces on structures that cause vibrations, lock-in and important motions. This paper aims to study the mutual interference between two circular cylinders in tandem arrangement, which is considered the simplest configuration of one array cylinders, elastically mounted in transversal direction and subject to a bi-dimensional uniform laminar flow at low Reynolds numbers. Both cylinders have the same diameter D and the center-to-center spacing is equal to L = 5.25D which corresponds to co-shedding regime. The academic numerical model Ifeinco, which is based on the finite element method and uses a partitioned scheme that considers two-way interaction of fluid flow and structure, has been employed to the analysis. Combinations of upstream and downstream stationary and elastically mounted cylinders are investigated for Reynolds number range from 90 to 140. Differences of flow behaviors drag and lift forces and resonance between single cylinder and cylinders in tandem arrangement were found. Mutual and respective influence of upstream cylinder motion on the downstream cylinder and vice-versa are analyzed. Results show that, in some engineering studies, the consideration of the flexibility of cylindrical structures in arrays is fundamental since it influences significantly the interference between cylinders, mainly the magnitude and direction of forces and characteristics of the resonance range, and, consequently, structural and dynamical behaviors.

Gullies are sewer inlets placed in pavements usually covered by bar grates. They are the most common linking-element used to drain a wide range of flows from surface runoff into the buried drainage system. Their hydraulic behavior and their overall hydraulic performance is dependent on the flow conditions, the gully dimension, geometry, and location of the outlet device. Herein a numerical research based on Volume Of Fluid (VOF) to detect the interface, and on the Shear Stress Transport SSTk-w turbulence model was conducted to study the importance of the outlet location and characterize flows through them in drainage conditions. Results provided detailed information about flow features, discharge coefficients, and efficiencies for different outlet locations. The authors identified three different regimes, R1, R2, and R3, and concluded that the outlet location influences the velocity field along the gully, the discharge coefficient, and the drainage efficiency. This allows for the estimation of uncertainty and its variation for different outlet positions.

Considerando-se, como base de reflexão, a ideia de uma habitação poderá ganhar muito em flexibilidade de uso e capacidade de apropriação se for constituída mais por

This paper describes a programme under the responsibility of the National Laboratory for Civil Engineering (LNEC), Portugal for the systematic observation and monitoring of maritime works, termed OSOM+, which has been applied to an extensive number of maritime structures on the Portuguese mainland coast and abroad. The OSOM+ programme comprises the following four main components for each structure: a) Periodic visual inspections by a trained technician; b) Periodic aerial inspections using a UAV/drone; c) The ANOSOM-GIS database, to store and/or query obtained information, as well as to diagnose present, evolution and risk conditions; and d) A mobile, portable, application, for real-time input and visualization of the ANOSOM-GIS database information.This recently updated methodology encompasses a number of tools whose functionalities are illustrated in this paper with an application to a case study: the Ericeira

O artigo desenvolve uma reflexão inicial sobre o que pode e deve ser uma habitação composta mais por um amplo leque de muitos sítios específicos do que por um conjunto limitado e já, tantas vezes, um pouco desatualizado de espaços ditos de/para atividades e funções domésticas. De certa forma avança-se numa

No artigo desenvolve-se a reflexão iniciada em artigo anterior e que visa o que pode e deve ser uma habitação composta mais por um amplo leque de muitos sítios específicos do que por um conjunto limitado e já, tantas vezes, um pouco desatualizado de espaços ditos de/para atividades e funções domésticas. De certa forma avança-se numa

No artigo parte-se do objetivo de se poder viver o espaço urbano com vagar, possibilidade esta diretamente associada ao adequado desenvolvimento dos usos pedonais, bem conjugados com os diversos tipos de tráfegos e, assim, tendencialmente estruturadores do bom funcionamento dos diversos níveis físicos citadinos; e tudo isto associado ao urgente desenvolvimento de um novo