DED/NAICI - Comunicações a congressos e artigos de revistahttp://repositorio.lnec.pt:8080/jspui/handle/123456789/10077672026-04-04T21:10:31Z2026-04-04T21:10:31ZMethodology for assessing structural noise annoyance in buildings caused by rail traffic. Comparative analysis between Portugal and SpainAntunes S.Patricio, J.http://repositorio.lnec.pt:8080/jspui/handle/123456789/10189972025-11-27T12:25:53Z2025-06-23T00:00:00ZMethodology for assessing structural noise annoyance in buildings caused by rail traffic. Comparative analysis between Portugal and Spain
Antunes S.; Patricio, J.
In recent years, the development of new construction materials and the publication of standards associated with new construction processes and evaluations have made it possible to construct buildings with high acoustic comfort.
Alongside the construction of buildings with high sound insulation requirements, other aspects, such as structural noise, are becoming more important.
This paper presents the evolution of the vibration and structural noise (ground-borne noise) descriptors in
environmental impact studies derived from rail traffic in Portugal. However, these criteria are not regulated, but
good practice guidelines are implemented by the management entities in order to contribute to the reduction
of annoyance and, consequently, complaints from the nearby residents. In this context, a comparative analysis is carried out between the criteria used to assess lowfrequency noise annoyance in two neighboring countries
(Portugal and Spain), to encourage the drafting of possible Portuguese regulations in this area.
2025-06-23T00:00:00ZDaylight and solar radiation “in situ” evaluation in the scope of Naturelab projectSantos, A. J.http://repositorio.lnec.pt:8080/jspui/handle/123456789/10189952025-11-27T12:25:47Z2025-10-07T00:00:00ZDaylight and solar radiation “in situ” evaluation in the scope of Naturelab project
Santos, A. J.
Daylight and solar radiation are essential factors that influence the quality of life of all living beings.
In the scope of Naturelab project, the main objectives of the daylight and solar radiation (DSR) evaluations are the assessment of how both daylight and solar radiation can contribute to the health, comfort, and well-being of individuals in outdoor spaces. Additionally, the potential positive effects of those factors are also evaluated as part of therapeutic programs. For this purpose, a set of indices and indicators are proposed based on on-site evaluation of the luminous environment and also based on the statistical analysis of groups of individuals regarding the before mentioned outdoor luminous environment. This paper presents the main on-site procedures for the characterization of the daylight and solar radiation components of the outdoor environment. The preliminary results indicate the influence of natural light and solar radiation in improving the health, well-being, and comfort of individuals in leisure and healing contexts.
2025-10-07T00:00:00ZEvaluating comfort and well-being: A post-occupancy approach for improvements – Insights from 10 residential case studiesNeto, M.Silva, C.Pinto, A.http://repositorio.lnec.pt:8080/jspui/handle/123456789/10189912025-11-27T12:25:28Z2025-07-04T00:00:00ZEvaluating comfort and well-being: A post-occupancy approach for improvements – Insights from 10 residential case studies
Neto, M.; Silva, C.; Pinto, A.
Indoor building environments influence people’s comfort and well-being. These concepts are increasingly being
studied comprehensively, and various methods exist to assess them, such as post-occupancy evaluations. This
study aims to develop a methodology to identify comfort and well-being parameters that, according to the occupants, require improvement and to suggest improvement measures. The research was conducted in ten
dwellings in Portugal. Data collection involved a survey applied in winter and summer, along with indoor
temperature measurements over a year. After this data collection, a methodology was developed to categorise
comfort and well-being parameters into three priority classes. The results indicate that the proposed method can be applied to different case studies with varying characteristics and occupants. Based on occupant feedback, comfort and well-being parameters that require improvement were identified, allowing the proposal of measures to improve indoor environments. Some measures impact multiple comfort and well-being parameters while influencing energy consumption. Passive solutions or measures that minimise energy use and mitigate increases in energy costs were prioritised. Some of the proposed measures were not initially considered a priority by the occupants. Still, they were recommended as they address specific problems or sources of dissatisfaction identified during the study.
2025-07-04T00:00:00ZSolutions for Radon Prevention and Mitigation in BuildingsReal, L. P.Patricio, J.Viegas, J.Pereira, A.Costa, J.Linares-Alemparte, P.http://repositorio.lnec.pt:8080/jspui/handle/123456789/10189902025-11-27T12:25:23Z2025-05-01T00:00:00ZSolutions for Radon Prevention and Mitigation in Buildings
Real, L. P.; Patricio, J.; Viegas, J.; Pereira, A.; Costa, J.; Linares-Alemparte, P.
Radon (Rn) is the largest natural source of ionizing radiation and exposure to high levels of this gas and its short-lived offspring over prolonged periods can become a public health problem.
Radon exists in soils and building materials and can enter buildings by convection through cracks in the envelope or by diffusion through the envelope itself when it is porous, reaching concentrations above the recommended reference levels.
The aim of this article is to present the factors that most influence the potential of radon gas in buildings and to indicate the main technological solutions for controlling, reducing and mitigating its effects.
Calculations are presented showing that the proper sizing of membranes and ventilation systems ensures indoor air quality, whatever the level of radon in buildings.
The conclusions highlight the importance of ventilation technologies in radon reduction systems, as well as their effectiveness in both preventing radon gas from entering and reducing its concentration once it has entered the building.
Also noteworthy is the ability of protective barriers to insulate the building envelope, provided they are properly sized with the appropriate mechanical characteristics, with a special focus on installation requirements.
Finally, the main future developments are outlined, with a view to ensuring greater sustainability of the materials, products and protection systems used.
2025-05-01T00:00:00Z