Natural Full-Scale Fire Test on a 3 Storey XLam Timber Building (Contributo in atti di convegno)

Type
Label
  • Natural Full-Scale Fire Test on a 3 Storey XLam Timber Building (Contributo in atti di convegno) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Frangi A., Bochicchio G., Ceccotti A., Lauriola M.P. (2008)
    Natural Full-Scale Fire Test on a 3 Storey XLam Timber Building
    in WCTE 2008 - 10th World Conference on Timber Engineering, Miyazak, Japan
    (literal)
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  • Frangi A., Bochicchio G., Ceccotti A., Lauriola M.P. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
  • June 2-5 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#descrizioneSinteticaDelProdotto
  • In the last years the construction industry has drawn attention to new construction methods based on building systems. Wood particularly fits the requirements of the idea “built with system” because of its easy manufacturing possibility. An example of a new successful construction system is the use of large cross-laminated (XLam) timber panels for wall and floor assemblies. XLam timber panels have become increasingly popular for residential buildings in Italy and abroad. An extensive research project, called SOFIE and sponsored by the Italian Province of Trento, on the structural behaviour of XLam timber buildings is currently carried out at CNR-IVALSA in Italy. The research project aims at supplying documentation and information on the use of XLam timber panels as structural elements, in order to increase its use in particular for residential multi-storey buildings. Prescriptive fire regulations often still restrict worldwide the use of timber. However, in the last couple of years, many countries have started to introduce performance based fire regulations or liberalized the use of timber for buildings. These regulations open the way for new applications. In taking advantage of the new possibilities it is essential to verify that fire safety of timber buildings is not lower than of buildings made of other materials. One area of research of the SOFIE project focuses on the experimental and numerical analysis of the fire performance of XLam timber buildings. A large number of fire tests have been performed on unloaded XLam timber panels at CNR-IVALSA using ISO-fire exposure. The testing program permits to study the influence of different parameters on the fire performance of XLam timber. Further, a full-scale test on a 3-storey building made of Xlam solid timber panels was performed under natural fire conditions to check the global performance and find possible weaknesses of the timber structure. The main results of this fire test are presented in the paper. The full-scale natural fire test has been carried out at the Building Research Institute in Tsukuba, Japan. The building main structure consisted of 85 mm thick XLam timber walls and 142 mm thick XLam timber slabs. The walls and the ceiling were protected by one or two layers of non combustible gypsum plasterboards. The fire room was equipped with two typical mattresses made of polyurethane. As additional fire load, several wooden cribs were located in the module. The total fire load density (calculated over the floor area) for the fire room was approximately 790 MJ/m2. After fire ignition, fire grew slowly due to low ventilation in the fire room (at the beginning of the fire test, each window was opened only at one quarter of the width). The glasses of the window openings started falling down after about 20 minutes. As the failure of the glasses of the windows progressed, the intensity of the fire inside the room and the external burning out the window became more severe. Flashover, i.e. where all unprotected combustible material burns, occurred after about 40 minutes. After about 55 minutes the fire intensity started declining and the fire was controlled and manually extinguished by fire fighting actions as planed after 60 minutes. The window openings above the fire room did not fail and thus no fire spread into the upper level was observed. The test has confirmed that with pure structural measures it is possible to limit the fire spread to one room even for timber structures. In the room above the fire compartment no elevated temperatures were measured and no smoke was observed. Further by protecting the timber structure with gypsum plasterboards the damage of the Xlam solid timber panels was not significant. The test results enlarge the experimental data for validation of natural fire simulations (temperatures, fire spread etc.) and for verifying the methods for the fire resistance calculation of timber constructions. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Frangi A.: Institute of Structural Engineering, ETH Zurich, Switzerland Lauriola M.P.: Timber Engineering, Florence, Italy (literal)
Titolo
  • Natural Full-Scale Fire Test on a 3 Storey XLam Timber Building (literal)
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