The National Laboratory for Civil Engineering I. P. is a public institution of scientific and technological research and development of Portugal. It is one of the largest civil engineering laboratories in the world.LNEC develops its action in the different fields of civil engineering, under the jurisdiction of the Ministry of Economy, in cooperation with the Ministry of Education and Science regarding the definition of its strategic guidelines, as stipulated by its Organic Law, Decree Law 157/2012, of July 18.History:LNEC was created on November 19, 1946 from the Laboratory for Materials Testing and Study of the Ministry of Public Works and the Center for Civil Engineering Studies, based at the Instituto Superior Técnico. This double-strand, research and experimentation, would decisively shape the future development of LNEC .On June 20, 1987 LNEC was made Honorary Member of the Military Order of Saint James of the Sword and on November 19, 1987 was made Honorary Member of the Military Order of Christ.LNEC carries out research activities in the fields as follows: public works, housing, town planning, environment, water resources, estuaries, coastal areas, transportation and communication networks, materials industry, building components and other products. The main purpose of these activities is to contribute to: the quality and safety of works; the protection and rehabilitation of the natural and built patrimony; the technological modernisation and innovation in the building sector; the minimisation of natural and technological hazards; the development of natural resources from a viewpoint of sustainable development.Those activities are as follows:Planned research: of a strategic nature, developed within research lines considered as priority due to their relevance for the country.Studies and expert reports under contract: advanced expert advisory services to public and private bodies, both national and foreign.Promotion of quality in construction: preparation of specifications, norms and regulations, approval and classification of new building materials and components, observation of the performance of works, certification of building projects by LNEC “Quality Mark” and normal tests.Dissemination of knowledge, as well as technical and scientific training: preparation of scientific and technical documents, organisation of technical courses or other training actions, organisation of scientific and technical meetings, both national and foreign, complemented by the publishing activity and by the Library.Co-operation with other bodies: activities of co-operation with various Portuguese and foreign bodies, namely with associations of a scientific and technical character, universities, laboratories and other institutions.LNEC website Wikipedia.
Baptista A.M.,National Laboratory for Civil Engineering
Journal of Constructional Steel Research | Year: 2012
The plastic criteria for the verification of steel cross-sections resistance are usually based on some basic hypotheses such as the development of plastic hinges, which depend on the interaction between the internal forces and the cross-section shape; therefore, specific equations are required for each type of cross-section. This paper presents new alternative interaction criteria for the analysis of steel I-sections subjected to an axial force and biaxial bending moments, at the elastic or the plastic limit states (as long as buckling phenomena are not involved). The plastic interaction criteria are presented, in a first step, for some particular combinations of the internal forces, such as axial loading with bending about a main axis, and biaxial bending without axial loading. In these cases, they are given by exact equations (within the frame of the hypotheses adopted in this study). All these plastic interaction criteria are compared with the corresponding plastic criteria adopted in the Eurocode 3 (EC3). Afterwards, a simplified global criterion is proposed for the simultaneous combination of an axial force and bending moments about both the main axes of inertia. This new simplified plastic criterion and the corresponding plastic criterion adopted in the EC3 are compared with the exact solution, obtained by a mixed numerical and analytical integration procedure. This comparison shows that this simplified criterion usually leads to results closer to the exact solutions. Some suggestions are then presented to improve the results given by the EC3. © 2012 Elsevier Ltd. All rights reserved.
Viegas J.C.,National Laboratory for Civil Engineering
Tunnelling and Underground Space Technology | Year: 2010
Impulse ventilation systems (IVS) are used to provide ventilation for covered car parks and to control the smoke in the event of fire. In this paper the interaction between the fire ceiling jet and the flow driven by jet fans is studied using CFD simulations. A sensitivity analysis considering important parameters as position and intensity of fire source, transversal distance between jet fans, restriction of exhaust flow rate and dimension of car park exhaust opening is carried out and rules for the design of 50 N thrust jet fans are deduced. An analytical model for the flow field near the ceiling is developed and compared with CFD simulations. This model is intended to support a first approach of the design of IVS. © 2009 Elsevier Ltd. All rights reserved.
Mata J.,National Laboratory for Civil Engineering
Engineering Structures | Year: 2011
The safety control of large dams is based on the measurement of some important quantities that characterize their behaviour (like absolute and relative displacements, strains and stresses in the concrete, discharges through the foundation, etc.) and on visual inspections of the structures. In the more important dams, the analysis of the measured data and their comparison with results of mathematical or physical models is determinant in the structural safety assessment.In its lifetime, a dam can be exposed to significant water level variations and seasonal environmental temperature changes. The use of statistical models, such as multiple linear regression (MLR) models, in the analysis of a structural dam's behaviour has been well known in dam engineering since the 1950s. Nowadays, artificial neural network (NN) models can also contribute in characterizing the normal structural behaviour for the actions to which the structure is subject using the past history of the structural behaviour. In this work, one important aspect of NN models is discussed: the parallel processing of the information.This study shows a comparison between MLR and NN models for the characterization of dam behaviour under environment loads. As an example, the horizontal displacement recorded by a pendulum is studied in a large Portuguese arch dam. The results of this study show that NN models can be a powerful tool to be included in assessments of existing concrete dam behaviour. © 2010 Elsevier Ltd.
Agency: Cordis | Branch: H2020 | Program: CSA | Phase: WATER-5a-2014 | Award Amount: 1.11M | Year: 2015
The overall objective of PIANO is to create a strategic cooperation partnership for water research and innovation between Europe and China, promoting the creation of networks of companies (including SMEs), entrepreneurs, not for profit organisations, policy makers, regulators and funding bodies to create business and social opportunities for China Europe Water Cooperation. PIANO will contribute to and is endorsed by the China Europe Water Platform (CEWP), and its 10 active EU Member States. First, PIANO will strengthen the existing CEWP network to create a comprehensive China Europe water research and innovation network. Second, based on a comparative analysis of the water innovation landscape in Europe and China, PIANO will identify European technological water innovations with potential for implementation and replication in China. In addition, PIANO will identify opportunities for joint development to address water challenges, where both Europe and China lack market ready technological water innovations. Third, PIANO will identify drivers and barriers for implementation and replication of technical innovations. PIANO will also identify strategies to overcome obstacles and take advantage of drivers, to facilitate creation of business opportunities. Fourth, PIANO will promote knowledge exchange and a policy dialogue to create an enabling environment for the uptake of technological water innovations. Fifth, PIANO will develop a shared strategic research and innovation agenda between Europe and China in the water sector. PIANO will align with current and future strategic initiatives to optimise opportunities for the EU and China across the water sector. To ensure success and achieve high impact, PIANO will be executed by a consortium of 9 leading European partners from both public and private sectors. Also, 13 leading Chinese partners are active PIANO participants, including the Ministries of Water Resources and of Environmental Protection.
Agency: Cordis | Branch: H2020 | Program: RIA | Phase: EO-2-2015 | Award Amount: 3.00M | Year: 2016
The Co-ReSyF project will implement a dedicated data access and processing infrastructure, with automated tools, methods and standards to support research applications using Earth Observation (EO) data for monitoring of Coastal Waters, leveraging on the components deployed SenSyF. The main objective is to facilitate the access to Earth Observation data and pre-processing tools to the research community, towards the future provision of future Coastal Waters services based on EO data. Through Co-ReSyFs collaborative front end, even young and/or inexperienced researchers in EO will be able to upload their applications to the system to compose and configure processing chains for easy deployment on the cloud infrastructure. They will be able to accelerate the development of high-performing applications taking full advantage of the scalability of resources available in the cloud framework. The included facilities and tools, optimized for distributed processing, include EO data access catalogue, discovery and retrieval tools, as well as a number of pre-processing and toolboxes for manipulating EO data. Advanced users will also be able to go further and take full control of the processing chains and algorithms by having access to the cloud back-end and to further optimize their applications for fast deployment for big data access and processing. The Co-ReSyF capabilities will be supported and initially demonstrated by a series of early adopters that will develop new research applications on the coastal domain, will guide the definition of requirements and serve as system beta testers. A competitive call will be issued within the project to further demonstrate and promote the usage of the Co-ReSyF release. These pioneering researchers in will be given access not only to the platform itself, but also to extensive training material on the system and also on Coastal Waters research themes, as well as to the projects events, including the Summer School and Final Workshop.