Distribution of Articles published per year
Total number of journals
PROCEEDINGS-ARTICLE 0 Reads 0 Citations The impact of extensive green roofs on the improvement of thermal performance for urban areas in Mediterranean climate w... Published: 01 January 2018
AIP Conference Proceedings, doi: 10.1063/1.5039250
Buildings with dark surfaces, concrete and pavement, needed for the expansion of cities, absorb huge amounts of heat, increasing the mean radiant temperatures of urban areas and offer significant potential for urban heat island (UHI) effect. The purpose of this work is to investigate the impact of green roofs on the improvement of urban heat performance in Mediterranean climate. A field investigation is carried out using two large-scale modules built in the city of Jijel in the north of Algeria. The first is a bare reinforced concrete slab whereas the second is covered with ivy plants. The experimental site, the air and surface temperature parameters and the various measurement points at the level of the modules are chosen. Measurements are performed using thermo-hygrometer, surface sensors and data acquisition apparatus. The results show that green roofs can be a potential mean of improving the thermal performance of the surrounding microclimate and energy performance of buildings in an urban area. The green roof could be an encouraging strategy against urban heat island effect not only for Mediterranean cities but also for other areas.
Article 0 Reads 0 Citations Evaluation of environmental impacts of hotel buildings having different envelopes using a life cycle analysis approach Published: 05 January 2017
Indoor and Built Environment, doi: 10.1177/1420326x16683235
Article 0 Reads 1 Citation Thermal and mechanical analysis of thermal break with end-plate for attached steel structures Published: 01 January 2017
Engineering Structures, doi: 10.1016/j.engstruct.2016.10.049
Highlights•Solutions for Nearly Zero Energy steel Buildings.•Thermal break for attached steel structures with end-plate.•It reduces by 20–65% the thermal bridge at the attached steel structure.•Mechanical tests show good ultimate behaviour with sufficient ductility of the system.•The cyclic loading behaviour of the connection is quite similar to that obtained under monotonic loading. AbstractThe thermal and mechanical performances of a simple thermal break are analysed. This thermal break can be used with external steel structures such as balconies and passageways attached on a concrete facade with external thermal insulation. The thermal barrier effect is obtained by a PVC and an acoustic insulation plates inserted between the end-plates of the attached steel beams and the support (floor slab, concrete wall). The thermal performances of the selected solutions were evaluated by numerical simulation. It shows that this simple solution reduces by up to 65% the thermal bridge at the attached steel beams connections. Besides, a parametric analysis showed that the reduction ratio depends on the configuration of thermal break (with or without additional thermal insulation around the steel beams at the connection), the thickness of PVC plate, the material of fastening systems (carbon steel or stainless steel) and the thickness of the facade thermal insulation. As deformable layers are used under the end-plates, the thermal break can be considered as unconventional steel connection with mechanical performances to be investigated. Thus, experimental program including static and cyclic tests is performed on various configurations of connections with thermal breaks to evaluate their mechanical behaviour considering the stiffness and the resistance. The results show that the solution of simple thermal break is efficient mainly for connections with extended end-plates.