62 documents found, page 1 of 7
Effects of Climate Change on Rendered Façades: Expected Degradation in a Progre...
Barrelas, Joana; Silva, Ana; de Brito, Jorge; Tadeu, AntónioClimate change could have a significant impact on buildings if its effects are not properly recognized. The consequences of climate action should be considered at the design and maintenance planning stage, with the objective of promoting the overall durability of constructions. Portugal, being part of the Mediterranean region, Southern Europe, and the Iberian Peninsula, and sometimes highlighted in projections ...
Theoretical and experimental analysis of the quasi-static and dynamic behaviour...
Tadeu, António; Fernández Romero, Antonio J.; Bandeira, Filipe; Pedro, Filipe; Dias, Sara; Serra, Miguel; Brett, Michael; Galvín, PedroThis work validates the simplified theoretical, analytical and numerical models used in the preliminary design stage of the 516 Arouca footbridge over the River Paiva (Portugal), the world's longest suspension footbridge. The models were used to define the configuration of the bridge under static loading and the eigenfrequencies excited under dynamic loading. The three-dimensional finite element model used in t...
Lightweight cement composites containing end-of-life treated wood – Leaching, h...
Dias, Sara; Almeida, João; Santos, Bruna; Humbert, Pedro; Tadeu, António; António, Julieta; Brito, Jorge de; Pinhão, PedroA huge amount of treated wood waste containing hazardous substances is produced every year all over Europe that simply ends up in landfills. In this study, the authors investigate the practical feasibility of using end-of-life treated wood for producing innovative lightweight cement composites. For this purpose, wood waste from four different sources was characterised to assess the presence of leaching substanc...
Thermal and Mechanical Characterisation of Sandwich Core Materials for Climatic...
Dias, Sara; Tadeu, António; Ramalho, Amilcar; Brett, Michael; Pedro, FilipeClimatic chamber testing conditions are becoming more demanding. A wide range of temperatures is used to check the quality of products and materials, since they are constantly being improved. However, there is no literature on how the components of the climatic chamber panels react under high temperatures. The present work therefore sets out to perform a thermal and mechanical characterisation of four core mate...
Design of new modular metal pallets: Experimental validation and life cycle ana...
Zacchei, Enrico; Tadeu, António; Almeida, João; Esteves, Miguel Alberto Pereira; Santos, Maria Inês; Silva, SamuelGiven the huge number of products transported worldwide every day, it would be advantageous to use lightweight pallets made of readily recyclable materials that are easy to clean, durable, and cheap to maintain. However, the design process for new metal pallets does not follow any specific code, which makes the transition to products with improved characteristics more challenging. This paper describes the devel...
Unsteady Coupled Moisture and Heat Energy Transport through an Exterior Wall Co...
Škerget, Leopold; Tadeu, António; Almeida, JoãoA mathematical model that governs unsteady coupled moisture and heat energy transport through an exterior wall covered with vegetation is described. The unknown temperature and moisture content of the plants and canopy air are represented by a system of nonlinear ordinary differential equations (ODEs). The transport of moisture and heat through the support structure, which includes insulation and soil layers, i...
Impact of Environmental Exposure on the Service Life of Façade Claddings—A Stat...
Barrelas, Joana; Dias, Ilídio S.; Silva, Ana; Brito, Jorge de; Flores-Colen, Inês; Tadeu, AntónioFaçade claddings, as the outer protection layer of the building’s envelope, are directly exposed to environmental degradation agents. The façades’ orientation and their distance from the sea, among other location and protection-related factors, influence their vulnerability to climate loads, in particular wind and air humidity. These loads, as well as exposure to air pollution, affect the degradation process of...
Evaluation of the Thermofluidic Performance of Climatic Chambers: Numerical and...
Ramezani, Bahareh; Tadeu, António; Jesus, Tiago; Brett, Michael; Mendes, JoelClimatic chambers are highly important in research and industrial applications and are used to examine manufactured samples, specimens, or components in controlled environment conditions. Despite the growing industrial demand for climatic chambers, only a few published studies have specifically concentrated on performance analysis and functional improvements through numerical and experimental studies. In this s...
Environmental Life-Cycle Assessment of an Innovative Multifunctional Toilet
Rodrigues, Carla; Almeida, João; Santos, Maria Inês; Costa, Andreia; Além, Sandra; Rufo, Emanuel; Tadeu, António; Freire, FaustoInnovative toilets can save resources, but have higher embodied impacts associated with materials and electronic components. This article presents an environmental life-cycle assessment (LCA) of an innovative multifunctional toilet (WashOne) for two alternative configurations (with or without washlet), comparing its performance with those of conventional systems (toilet and bidet). Additionally, two scenario an...
3D Dynamic Simulation of Heat Conduction through a Building Corner Using a BEM ...
Simões, Nuno; Prata, Joana; Tadeu, AntónioThis paper sets out a three-dimensional (3D) boundary element method (BEM) formulation in the frequency domain to simulate heat transfer through a point thermal bridge (PTB) at a corner in a building envelope. The main purpose was to quantify the dynamic e ect of a geometrical PTB in terms of distribution of temperatures and heat fluxes, which is useful for evaluating moisture condensation risk. The numerical m...