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European overview of sustainable policies and approaches in COST C25 member cou...

The implementation of the principles and methods towards a Sustainable Construction varies across different countries in Europe. In some countries, the sustainability of the construction sector has been effectively taken into consideration over the last years, while in other its implementation is at an initial stage. Many reasons may be pointed out for this situation. Different countries have different understa...

Modelling connections of moment resisting steel frames for seismic analysis

The seismic response of moment resisting steel frames depends on the behaviour of the beamto- column connections, in particular when these are considered to be dissipative zones. This paper aims to contribute to a better understanding of modelling joints of steel moment resisting frames concerning their seismic behaviour. The modified Richard-Abbott constitutes a sophisticated model and is used here to reproduc...

Influence of track irregularities on the dynamic behaviour of medium spans viad...

Railway track irregularities consist of a deviation of the inside edge of the rail from the ideal geometric rail contour and may occur even during the passage of the vehicle at a very low speed. Track irregularities can influence the dynamic behaviour of railways bridges and increase dynamic load effects. This paper addresses the influence of different irregularities on the dynamic behaviour of a medium span br...

Influência das irregularidades da via na resposta dinâmica de pontes ferroviári...

As irregularidades na via-férrea influenciam o comportamento dinâmico das pontes ferroviárias e aumentam os efeitos dinâmicos produzidos pela passagem dos eixos do comboio. Neste estudo é analisada a influência das irregularidades da via-férrea na resposta dinâmica de uma ponte, cuja primeira frequência natural de vibração se encontra sobre os limites definidos no Eurocódigo 1. São consideradas diferentes irreg...

Towards a consistent design approach for steel joints under generalized loading

The behaviour of steel joints is complex and requires the proper consideration of a multitude of phenomena, ranging from material non-linearity (plasticity, strain-hardening), non-linear contact and slip, geometrical non-linearity (local instability) to residual stress conditions, and complicated geometrical configurations. The component method is widely accepted as the practical approach in predicting the beha...

Survey of sustainable approaches in Portugal

In Portugal Sustainable Construction has long being recognized as an important goal, although only few objective actions have been implemented over the last years. However, given the emphasis of the European Community on the issue and the mandatory adoption of European Directives in Member countries, in the next years, it is expected that initiatives towards the effective application of the principles of Sustai...

Experimental study of single span railway bridges

The main purpose of this paper is to present some results concerning the investigation that has been done by the authors regarding the dynamic response of small to médium span railway bridges using response acceleration data colleted during the measurements carried out on single span bridges on the railway track Linz-Wels, in Austria. Using output-only methods in this experimental program, it was possible to ha...

Experimental behaviour of a steel structure under natural fire

Current design codes for fire resistance of structures are based on isolated member tests subjected to standard fire conditions. Such tests do not reflect the behaviour of a complete building under either normal temperature or fire conditions. Many aspects of behaviour occur due to the interaction between members and cannot be predicted or observed in tests of isolated elements. Performance of real structures s...

Towards sustainability : life cycle assessment of building products

Sustainability assessment of new construction technologies : a comparative case...