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Filippo Ubertini   Professor  Other 
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Filippo Ubertini published an article in October 2018.
Research Keywords & Expertise
0 A
0 Carbon Nanotubes
0 Reinforced Concrete
0 Resistance
0 Sensors
0 Structural Health Monitoring
Top co-authors See all
C. Gentile

177 shared publications

Department ABC, Politecnico di Milano, Milan, Italy

Franco Cotana

130 shared publications

Department of Engineering, University of Perugia, Via G. Duranti 67, 06125 Perugia, Italy

Fabio Orlandi

92 shared publications

ISIS Facility; Rutherford Appleton Laboratory; Harwell Oxford Didcot OX11 0QX UK

Anna Laura Pisello

87 shared publications

CIRIAF – Interuniversity Research Center on Pollution and Environment ‘Mauro Felli’, University of Perugia, Perugia, Italy

Annibale Luigi Materazzi

44 shared publications

Department of Civil and Environmental Engineering, University of Perugia, via G. Duranti 93, 06125 Perugia, Italy

143
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173
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Publication Record
Distribution of Articles published per year 
(1999 - 2017)
Total number of journals
published in
 
34
 
Publications See all
Article 0 Reads 0 Citations Crack detection and localization in RC beams through smart MWCNT/epoxy strip-like strain sensors Enrique García-Macías, Luis Rodríguez-Tembleque, Andres Saez... Published: 05 October 2018
Smart Materials and Structures, doi: 10.1088/1361-665x/aae668
DOI See at publisher website
Article 0 Reads 0 Citations Two-step hierarchical micromechanics model of partially saturated porous composites doped with ellipsoidal particles wit... Enrique García-Macías, Rafael Castro-Triguero, Filippo Ubert... Published: 01 September 2018
Composites Part B: Engineering, doi: 10.1016/j.compositesb.2018.04.037
DOI See at publisher website
Article 0 Reads 0 Citations Stainless Steel Microfibers for Strain-Sensing Smart Clay Bricks Antonella D’Alessandro, Andrea Meoni, Filippo Ubertini Published: 05 August 2018
Journal of Sensors, doi: 10.1155/2018/7431823
DOI See at publisher website ABS Show/hide abstract
Life cycle monitoring of structural health of civil constructions is crucial to guarantee users’ safety. An optimal structural health monitoring system allows to automatically detect, locate, and quantify any damage in structural elements, thus anticipating major risks of local or global failures. Critical issues affecting traditional monitoring systems are sensors’ placement, hardware durability, and long-term reliability of the measurements. Indeed, sensors’ deployment is crucial for an effective investigation of the static and dynamic characteristics of the structural system, whereby durability and long-term stability of sensing systems are necessary for long-term monitoring. A very attractive solution to some of these challenges is developing sensors made of the same, or similar, material of the structure being monitored, allowing a spatially distributed and long-term reliable monitoring system, by the use of self-sensing construction materials. Within this context, the authors have recently proposed new “smart clay bricks” that are strain-sensing clay bricks aimed at embedding intelligent monitoring capabilities within structural masonry buildings. While previous work focused on smart bricks doped with titanium dioxide and using embedded point electrodes, this work proposes an enhanced version of smart bricks based on the addition of conductive micro stainless steel fibers that possess higher electrical conductivity and a more suitable fiber-like aspect ratio for the intended application, as well as plate copper electrodes deployed on top and bottom surfaces of the bricks. The paper thus presents preparation and experimental characterization of the new smart bricks. The influence of different amounts of fibers is investigated, allowing the identification of their optimal content to maximize the gauge factor of the bricks. Both electrical and electromechanical experimental tests were performed. Overall, the presented results demonstrate that the new smart bricks proposed in this paper possess enhanced strain-sensing capabilities and could be effectively utilized as sensors within structural masonry buildings.
Article 0 Reads 0 Citations Effect of PCM on the Hydration Process of Cement-Based Mixtures: A Novel Thermo-Mechanical Investigation Claudia Fabiani, Antonella D’Alessandro, Filippo Ubertini, F... Published: 23 May 2018
Materials, doi: 10.3390/ma11060871
DOI See at publisher website ABS Show/hide abstract
The use of Phase Change Material (PCM) for improving building indoor thermal comfort and energy saving has been largely investigated in the literature in recent years, thus confirming PCM’s capability to reduce indoor thermal fluctuation in both summer and winter conditions, according to their melting temperature and operation boundaries. Further to that, the present paper aims at investigating an innovative use of PCM for absorbing heat released by cement during its curing process, which typically contributes to micro-cracking of massive concrete elements, therefore compromising their mechanical performance during their service life. The experiments carried out in this work showed how PCM, even in small quantities (i.e., up to 1% in weight of cement) plays a non-negligible benefit in reducing differential thermal increases between core and surface and therefore mechanical stresses originating from differential thermal expansion, as demonstrated by thermal monitoring of cement-based cubes. Both PCM types analyzed in the study (with melting temperatures at 18 and 25 ∘C) were properly dispersed in the mix and were shown to be able to reduce the internal temperature of the cement paste by several degrees, i.e., around 5 ∘C. Additionally, such small amount of PCM produced a reduction of the final density of the composite and an increase of the characteristic compressive strength with respect to the plain recipe.
Article 0 Reads 1 Citation An Experimental Study on Static and Dynamic Strain Sensitivity of Embeddable Smart Concrete Sensors Doped with Carbon Na... Andrea Meoni, Antonella D’Alessandro, Austin Downey, Enrique... Published: 09 March 2018
Sensors, doi: 10.3390/s18030831
DOI See at publisher website ABS Show/hide abstract
The availability of new self-sensing cement-based strain sensors allows the development of dense sensor networks for Structural Health Monitoring (SHM) of reinforced concrete structures. These sensors are fabricated by doping cement-matrix mterials with conductive fillers, such as Multi Walled Carbon Nanotubes (MWCNTs), and can be embedded into structural elements made of reinforced concrete prior to casting. The strain sensing principle is based on the multifunctional composites outputting a measurable change in their electrical properties when subjected to a deformation. Previous work by the authors was devoted to material fabrication, modeling and applications in SHM. In this paper, we investigate the behavior of several sensors fabricated with and without aggregates and with different MWCNT contents. The strain sensitivity of the sensors, in terms of fractional change in electrical resistivity for unit strain, as well as their linearity are investigated through experimental testing under both quasi-static and sine-sweep dynamic uni-axial compressive loadings. Moreover, the responses of the sensors when subjected to destructive compressive tests are evaluated. Overall, the presented results contribute to improving the scientific knowledge on the behavior of smart concrete sensors and to furthering their understanding for SHM applications.
Article 0 Reads 0 Citations Automated crack detection in conductive smart-concrete structures using a resistor mesh model Austin Downey, Antonella D’Alessandro, Filippo Ubertini, Sim... Published: 19 February 2018
Measurement Science and Technology, doi: 10.1088/1361-6501/aa9fb8
DOI See at publisher website
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