Estruturas de Edifícios em Light Steel Framing

Diogo José Martins

Key information

Authors:

Diogo José Martins (Diogo José Martins Rego)

Supervisors:

João Sérgio Nobre Duarte Cruz (João Sérgio Nobre Duarte Cruz)

Published in

11/12/2012

Abstract

The structures of buildings that use the Light Steel Framing (LSF) constructive method stand out as a possible constructive system for the future, since it effectively addresses and resolves the ecological mistakes existent in other methods. One of the objectives of this thesis was to examine, study and evaluate several parameters related to thermal performance, acoustics, fire resistance and sustainability, because these are decisive factors when selecting a construction method. Comparing the construction method in study with the traditional masonry solution, it was found that the LSF method presents (i) excellent thermal performance, (ii) good acoustical performance, (iii) excellent durability, sustainability and eco-efficiency indicators. The main objective of this thesis consisted in the development and analysis of a structural model of a LSF building, studying the behaviour of the structure in conjunction with the OSB siding panels and the calculation techniques related with the system, prescribed in EN1993. Modelling the structure in SAP2000 allowed the assessment of the best techniques for computational modelling of certain structural elements and behaviours, predominantly the diagonal straps and the diaphragm effect of OSB. It was then concluded, that this effect should be considered in the structural model due to its influence on the seismic behaviour. Given the complexity of the design process of Class 4 steel sections, this was presented concisely through flowcharts. Because of the extension of the obtained results, charts which summarize the design values were developed so that they can be used in the future for a more efficient pre-design.