Browsing by Issue Date, starting with "2017-04-15"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
- Characterisation of unidirectional fibre reinforced grout as a strengthening material for RC structuresPublication . Gião, Rita; Lucio, Valter; Chastre, CarlosThe main goal of the present research work is to characterise a unidirectional fibre reinforced grout (UFRG), developed as an alternative material to strengthen RC structures using small thickness jacketing. A high performance cementitious grout reinforced with continuous and unidirectional non-woven steel fibre mat has been developed for this purpose. It was expected that the optimization of the percentage and alignment of the steel fibres would yield a more efficient fibre grout. In fact, the composite should attain higher tensile strength with continuous fibres since the fibre embedment length is enough to prevent fibre pull-out. An experimental programme was carried out to characterise the UFRG’s mechanical properties. Compressive tests were conducted on small thickness tubular specimens to enable the determination of the compressive strength and the static modulus of elasticity. The tensile strength was obtained from splitting tests performed on cubic specimens (DIN 1048-5). Semi-empirical equations, based on the experimental results, are proposed to estimate UFRG’s modulus of elasticity, compressive strength and tensile strength. Two strengthening solutions for RC structures using small thickness CFRP jacketing are presented.
- Services enabler architecture for smart grid and smart living services providers under industry 4.0Publication . Batista, Nelson; Melício, Rui; Mendes, VictorFor an industry 4.0 environment, the management and offering of services, falls over the construction of a stable and reliable sensor and actuator infrastructure. Industry 4.0 is undergoing increase advancement, infrastructure availability and public acceptance, mainly boosted by the Interconnected Things. The public acceptance drives an increase on investments, carrying an insurgence of companies competing with each other to gain market. Although lessening costs, this insurgence has brought heterogeneous infrastructures and solutions availability, challenging services providers. Among the challenges the security and different technology solutions support are of the most importance. The scattering of solutions and software code have to be conveniently gathered to avoid weak-points, eventually, a menace to be explored by hackers. This paper is a contribution in order to embraces those challenges in a new architecture framework able of supporting the creation of solutions for Smart Grid and Smart Living services providers under the industry 4.0 paradigm. The architecture framework design offers security, simplicity of implementation and maintenance, and is resilient to failures or attacks and technologically independent. Field tests are reported in order to evaluate key aspects of the proposed architecture.