Browsing by Author "Rodrigues, Fernanda"
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- BIM-based LCA assessment of seismic strengthening solutions for reinforced concrete precast industrial buildingsPublication . Raposo, Cátia; Rodrigues, Fernanda; Rodrigues, HugoConstruction sector contracts have relevant socioeconomic importance in contrast with its high environmental impact due to the intensive consumption of natural and energy resources throughout the buildings’ service life. Thus, this sector has been object of actions aiming the promotion of low carbon construction and refurbishment given its potential to reduce emissions of greenhouse gases by applying more sustainable materials and techniques. With the development of the building information modeling (BIM) methodology, it is possible to develop the different project specialities in an integrated and collaborative platform since its initial phase, also facilitating the integration of life cycle assessment (LCA). The present work aims to evaluate and compare the environmental impacts of prefabricated concrete elements of new construction and solutions of seismic reinforcement of these elements in an existing building, as well as their costs, through LCA methodology and life cycle cost (LCC). For this purpose, the BIM model of an industrial building with a prefabricated concrete structure was developed and the respective LCA was achieved. It was considered the model of a similar building with 30 years of existence, whose structural calculation not considered the correct strengthening to face seismic actions. The respective seismic reinforcement solution was analyzed, and the corresponding LCA was accomplished. For each case, the LCC was calculated. The analysis of the two buildings highlighted the importance of rehabilitation in the construction sector, since the environmental impacts and the associated costs are reduced when compared to the construction of a new building.
- Building life cycle applied to refurbishment of a traditional building from Oporto, PortugalPublication . Rodrigues, Fernanda; Matos, Raquel; Alves, Ana; Ribeirinho, Paulo; Rodrigues, HugoBuildings management along with its life cycle is currently an issue that requires a great optimisation considering the high cost associated with the buildings use and due to the operation and maintenance costs. The number of existing buildings needing refurbishment actions justify the need of an intervention model that optimise its service life after the refurbishment process. So, a refurbishment, maintenance and costs planning should be established and guided by value for money principles. The aim of this paper is to analyse the application of Buildings Life Cycle Management (BLCM) to a case study under a refurbishment process, to study the specific solutions and to assess the correspondent service life using the factor method according the ISO 15686 family. With this study, was possible to assess solutions and refurbishment conditions in terms of durability, when compared between the different proposals. In order to improve the case study Building Life Cycle maintenance, in addition, was applied Building Information Modelling (BIM), as BLCM is connected with BIM in order to highlight the importance of their inter-relationship. This study concludes about the most advantageous type of maintenance, how BIM can contributes to BLCM and how can improve maintenance plans. Thus, this study contributes to highlight the importance of preventive maintenance, to promote its implementation and consequently, to use maintenance plans reducing life cycle cost and increasing materials service life.
- Energy efficiency assessment of a public building resourcing a BIM modelPublication . Rodrigues, Fernanda; Isayeva, Anastasiya; Rodrigues, Hugo; Pinto, ArmandoThe construction sector high energy consumption and GHG emissions lead to the development of easier methodologies to achieve low carbon buildings. Currently, the use of Building Information Modeling (BIM) is growing in the Architecture, Engineering, Construction and Operation (AECO) sector, and it assumes relevance in buildings energy simulation. Therefore, this work aims to explore the potential and limitations of applying BIM to energy management and simulation in the operation life cycle phase of a service building, and comparing it with a specific and customized tool for energy efficiency assessment of public buildings. A service building BIM model was developed in Autodesk Revit showing its utility when used as an asset for storing and organize energy-related data. The add-in Energy Analysis for Autodesk Revit allowed automatically generating the Building Energy Model (BEM) from the BIM model and performing a cloud-based simulation in Autodesk Green Building Studio (GBS). The energy consumption results obtained in GBS were compared with the results obtained with the energy simulation tool ECO.AP developed in the Portuguese National Laboratory of Civil Engineering (LNEC). It was possible to infer that the input limitations of GBS, mainly in HVAC systems customization, compromise the representation and energy performance evaluation of the building under actual operating conditions, making GBS more adequate for early buildings life cycle stages where energy simulation results may support decisions that aim to improve the buildings energy performance during the operation phase.
- Risk management in water supply networks: Aveiro case studyPublication . Rodrigues, Fernanda; Borges, Manuela; Rodrigues, HugoWater supply networks are critical infrastructures essentials to health, safety, economic and social well-being which have to be maintained and preserved to ensure their proper functioning. Considering the importance of these critical infrastructures, the risks to which they are exposed and the consequences of such risks must be analysed. Thus, it is important that companies responsible for the management of these assets incorporate risk management in their activities. In the scope of risk management, this paper intends to identify the vulnerabilities of water supply infrastructures, by analysing the risks they are exposed and identifying the measures that need to be implemented or reinforced. Risk assessment methodologies were analysed to identify the advantages and disadvantages of each one. As a case study, the water supply network of the Aveiro municipality in mainland Portugal was used. This network was analysed resourcing ArcMap, ArcGIS desktop software, which allows a better understanding of the water supply network. Risk management was applied and the probability and possible consequences of six distinct categories of threats were determined in eight scenarios, allowing the development of risk maps concluding that all these scenarios are in a low or medium level of risk. To decrease the vulnerability of the water network, a set of plans and specific measures have to be developed.
- Seismic precast. Seismic performance assessment of existing precast industrial buildingsPublication . Furtado, André; Arêde, António; Rodrigues, Fernanda; Rodrigues, Hugo; Vitorino, Hugo; Varum, Humberto; Ostetto, Liana; Batalha, Nádia; Fernandes, Paulo; Sousa, Romain; Silva, VítorPast seismic events exposed important fragilities in precast reinforced concrete buildings and highlight the need to undertake measures to mitigate future losses.The study presented identify potential structural and nonstructural fragilities of the Portuguese building stock and provide guidance to reduce the associated direct and indirect socio-economic impact
- Seismic Vulnerability Assessment of a Water Supply Network: City of Aveiro Case StudyPublication . Pires, Hélder; Rodrigues, Hugo; Afonso, Armando Silva; Pimentel-Rodrigues, Carla; Rodrigues, FernandaCritical infrastructures have critical importance on societies as they rely on fundamental development and safety aspects. The inoperability of these networks can cause great damage to strategical state-related activities and may reduce the ability to address the results in the aftermath of an accident or catastrophe. Taking in mind that damages in a water supply network do not depend only on the intensity of the disaster, but also on the vulnerability of each component of the entire system, it is important to ensure the ability of these infrastructures to remain operational during and after any disruptive event to prevent the loss of availability of vital goods and services, but also due to the high level of interdependence between different networks, that can lead to a propagation of effects, increasing the level of losses. The seismic vulnerability assessment of water systems is one of the most effective mitigation strategies that will allow to estimate the serviceability of the system and evaluate the estimated direct losses in terms of replacement cost. This paper aims to revise the main seismic risk assessment methodologies available for seismic vulnerability assessment of water networks and based on the selected methodology to present an application to a real network.