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Found 36 results.

Nov, 18 2022 (v1) Journal article Open Access

Moisture-Related Risks in Wood-Based Retrofit Solutions in a Mediterranean Climate: Design Recommendations

Urso Alessandra; Costanzo Vincenzo; Nocera Francesco; Evola Gianpiero;

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Nowadays, advanced hygrothermal simulation tools are available and they are widely used
to predict moisture-related risks in building components, such as mold growth and increased conductive
heat losses. This paper takes advantage of these capabilities to analyze moisture-related risks
in the innovative wood-based retrofit solutions, developed in the ongoing H2020 “e-SAFE” project.
In particular, simulations carried out through the Delphin software for the warm Mediterranean climate of Catania (Italy) allowed assessing the effectiveness of several insulating materials used in the wall assembly and the moisture-related performance determined by adopting either a waterproof membrane or a vapor barrier in convenient positions. The results show that the solutions with highly permeable and highly moisture-capacitive insulation (e.g., wood fiber) are mold free, but at the expense of increased heat losses by up to 12%, compared to dry materials). In some circumstances, foam glass or extruded polyurethane could be preferable, due to their high resistance to mold growth and their flat sorption curve. The vapor-open waterproof membrane applied to the outer side of the insulation is suggested, while a vapor barrier on the outer side of the existing wall worsens mold-related issues.

Nov, 01 2022 (v1) Journal article Open Access

Probabilistic friction model for aluminium–steel Asymmetric Friction Connections (AFC)

Aloisio, Angelo; Contento, Alessandro; Boggian, Francesco; Tomasi, Roberto;

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Multiple physical variables potentially affect the friction coefficient of Asymmetric Friction Connections (AFC). This paper discusses the cyclic response of a class of AFC subjected to repeated load protocols. Two phenomena are observed. First, the friction coefficient, initially higher due to wear phenomena and moment-axial force shear force interaction, stabilizes after multiple cycles. Second, the test repetitions on the same specimen show that the friction coefficient at the beginning of the loading protocol is higher than that observed at the end of the antecedent load protocol. The experimental data prove that the dissipated energy during the current load test, temperature, and the specimen’s history affect the friction coefficient. This paper presents two probabilistic friction models calibrated using a Bayesian approach. The first engineering-oriented model is dependent on the dissipated hysteretic energy. The second includes the measured temperature as a model regressor to estimate its possible role in the response. The proposed probabilistic models can be used to predict with satisfactory accuracy the friction coefficient in Coulomb-like hysteresis models of AFCs.

Aug, 23 2022 (v2) Report Open Access

Deliverable D4.4 - e-SAFE BEMS early version

Yümlü M. Serdar; Tosunoğlu Caner; Misafir Levent; Yantaç Berk; Güreken Cenk;

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This Deliverable corresponds to the first and early version of the e-BEMS (Building Energy Management System). The present document contains the collection of all the developments carried out in Task 4.3. It contains the definition of the BEMS as an ICT solution for monitoring purposes and for managing the energy systems.
The objective of this deliverable is to provide the first version of the e-BEMS system that will monitor and partly control the building's mechanical and electrical equipment within Task 4.3.

The document first analyzes the BEMS scope and provides some examples of BEMS frameworks that are suitable for the project purposes. e-BEMS is then analyzed from the end-user’s perspective through user stories, and functional and non-functional requirements within e-SAFE project are considered. Probes for indoor and outdoor comfort, energy production and consumption, and also thermal system probes, are presented in this first version.
Moreover, the first version of the e-BEMS is provided with its main features and components. Supported data communication and exchange protocols, the data model of the e-BEMS environment and user interfaces are provided as the base platforms.

Sep, 01 2022 (v1) Journal article Open Access

Experimental and analytical study of Friction Connection for seismic retrofit with Cross-Laminated Timber (CLT) panels

Boggian, Francesco; Aloisio, Angelo; Tomasi, Roberto;

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Within the European project e-SAFE (Energy and Seismic AFfordable rEnovation solutions), this paper presents the experimental tests and modeling attempts for a class of Asymmetric Friction Connections (AFCs) tested in the laboratories of the Norwegian University of Life Sciences. The AFCs are part of the seismic retrofitting solution, called e-CLT, based on installing Cross-Laminated Timber (CLT) panels in reinforced concrete structures using friction connections. The authors carried out experimental tests on AFCs fixed with screws to a CLT panel to observe the contribution of timber to the total dissipation performance. The investigation is based on 20 cyclic test data with two different setups. The main one includes a CLT panel and screw connection, while the second one isolates the friction behaviour to evaluate the influence of the screw connection. A modified LuGre hysteresis model for friction is developed to simulate the experimental cyclic response of the tested specimen. The model possesses a direct physical meaning, and it explicitly depends on the slip force and the pre-slip stiffness. The optimized model is used to assess the performance of the AFC by varying the pre-slip stiffness and the slip force.

Jul, 31 2022 (v1) Journal article Open Access

Energy performance of a prefabricated timber-based retrofit solution applied to a pilot building in Southern Europe

EVOLA Gianpiero; COSTANZO Vincenzo; URSO Alessandra; TARDO Carola; MARGANI Giuseppe;

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This paper advances the current knowledge on the use of prefabricated timber-based panels in building renovation by analyzing in detail the thermal performance achieved by two different renovation solutions developed in the framework of the ongoing e-SAFE H2020 project. In particular, these solutions apply to the external walls of a pilot building located in Catania (Italy) as a double-skin façade that increases also the seismic performance of the building. The dynamic energy simulations reveal that the proposed solutions allow reducing the energy need for space heating and space cooling by 66% and 25%, respectively. One further finding is that, although the proposed timber-based renovation solutions are not affected by mould growth and surface condensation risk, the
impact of thermal bridges cannot be neglected after renovation. Indeed, despite the strong reduction in the magnitude of heat losses due to thermal bridges (from 667 W⋅K-1 down to 213.1 W⋅K-1), they still account for about 21% of total heat losses after the renovation. This suggests that more complex and expensive technological solutions should be introduced to further reduce heat losses in some thermal bridges, but a cost-benefit analysis should justify their adoption. Finally, overlooking these thermal bridges in dynamic energy simulations can lead to an average underestimation of the heating and cooling energy demand after the renovation, by about 16% and 5% respectively. In this regard, the paper proposes a simplified yet reliable approach to include heat transfer
through thermal bridges in the post-processing stage of dynamic energy simulations under thermostatic control.

Aug, 24 2022 (v1) Report Open Access

Deliverable D5.2 - Report with the preliminary co-design outcome

D'URSO Sebastiano; NICOLOSI Grazia Maria; EVOLA Gianpiero; COSTANZO Vincenzo; TARDO Carola; SEMPRINI Giovanni; LIUZZO Mariangela;

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This document is the Deliverable “D5.2 – Report with the preliminary co-design outcome” of the e-SAFE project (Grant Agreement No. 893135), funded by the European Commission under its Horizon 2020 Research and Innovation Programme (H2020).

The document describes the preliminary co-design activities that led to the preliminary design of the pilot building in Via Acquicella Porto 27/H in Catania (Italy) within the e-SAFE project. The document also reports the outcomes of the co-design process regarding architectural, technological, structural issues, and the thermal systems. e-SAFE experts and local stakeholders have contributed to them, each one for their own skills and needs.

Aug, 24 2022 (v1) Presentation Open Access

Heat and mass transfer modelling for moisture related risks in walls retrofitted by timber materials.

Evola Gianpiero;

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This is the presentation given at the 5th IBPSA Italy Conference "Building Simulation Applications" (BSA 2022), regarding the hygrothermal behaviour of the e-CLT retrofit solution developed in the Horizon 2020 Project "e-SAFE". The presentation shows that in Milan (Northern Italy), a moderate mould growth risk occurs in the wood fibre, while no risk occurs in the CLT. The liquid water (LWC) kept inside the wooden materials increases the U value by around 10% if compared with dry materials. The presentation also discusses some issues regarding the reliability of the weather data and the hogrothermal properties of CLT.

Jul, 04 2022 (v1) Other Open Access

ENSURING SAFE AND ENERGY EFFICIENT BUILDINGS - How to integrate seismic-safety with energy renovations in the EPBD

Milne. Caroline; Taranu, Victoria;

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The EPBD recast can strategically support the uptake of seismic renovations alongside energy efficiency in the EU. This means ensuring a robust policy framework that prioritises renovation of worst-performing buildings in terms of both energy performance and seismic safety. This framework should be combined together with reliable and accessible technical and financial solutions.
This paper suggests practical ways that the EPBD recast can strategically support the uptake of seismic renovations alongside energy efficiency in the EU, in order to ensure concrete implementation of seismic safety measures where it is needed most.
This paper is presented by the e-SAFE H2020 consortium. e-SAFE aims to develop a new deep renovation system for non- historical reinforced concrete (RC) framed buildings, which combines energy efficiency and anti- seismic retrofitting actions with a series of further advantages including affordability, improved architectural image and reduced implementation time, costs and occupants’ disruption.
e-SAFE will also address strategies to activate new value chains to boost the deep renovation market throughout Europe, including financial and social aspects.

Mar, 31 2022 (v1) Proposal Open Access



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This is the call for expression of interest for virtual pilots, available in English, Romanian, Turkish, Bulgarian, Greek an Italian. e-SAFE is looking for multi-storey (at least three storeys) non historical buildings that are located in earthquake-prone areas in Europe and in need of renovation. Applications are open to building owners or building managers, public or private entities that administer social housing or public buildings, as well as real estate brokers.

May, 10 2022 (v1) Other Open Access

Application process open: EU-funded project offering free renovation advice and support for energy and seismic safety


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Press release issued on 10 May 2022 outlining the opportunity to apply for the selection of virtual pilots opened by the e-SAFE project.