Optimization of tubular trusses using intumescent coating in ﬁre
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||16|
|Publication status||Published - 2016|
|Publication type||A1 Journal article-refereed|
In steel structures, the cost of ﬁre protection can be signiﬁcant. They are typically designed to resist loads at room temperature after which the ﬁre protection is considered. This widely used approach may result in expensive and unpractical solutions. On the other hand, automatic design systems utilizing optimization allow taking ﬁre design aspects into account simultaneously. In this research, these two approaches are compared in a tubular roof truss case where intumescent coating is used as ﬁre protection. The results show clearly the beneﬁts of combined structural and ﬁre engineering design. Design with Finnish national and ETA approvals of intumescent coating are compared for 30 and 60 minutes resistance to standard ﬁre. It is shown, that ETA-approved rules indicate increased costs to tubular structures for 60 minutes ﬁre. For 30 minutes the diﬀerence between the two approval systems were less signiﬁcant.