Fire Resistance of non-loadbearing LSF walls
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A set of full scale fire resistance tests of non-loadbearing walls is presented to evaluate the effect of the steel frame (number and position of studs and tracks) and different protection materials. The experimental tests are developed in accordance to the international standards EN1364-1 for the sample preparation and conditions for testing and in accordance with the generic standard fire test EN1363-1, used for the criterion to rate this type of building construction element under fire. Numerical models are also used to compare the results of the tests. The numerical model is validated, using the boundary conditions defined in Eurocode EN1991-1-2 and specific boundary conditions in the cavity of the wall. These specific boundary conditions are essential when assuming that the heat transfer flows by convection and radiation, from the exposed side to the unexposed side of the wall. The results allow to conclude on the behaviour of different systems of protection used for the cold formed steel structure, on the effect of the structure and to present the hybrid model to validate the numerical results.
A set of full scale fitre resistance tests od non-loadbearing wall is presented to evalue to effect os the steel frame (number and position os studs and stracks) and different protection materials.
The wooden slabs are structural elements with wide application, in particular, in building rehabilitation, interior spaces and in new building structures. The mechanical, thermal and acoustic properties make this material as an ideal solution for floor and roof slabs applications. However, when exposed to an accidental fire condition it is necessary to assess their vulnerable behaviour accurately. In this work, an advanced calculation model is presented, based on the use of finite elements, calibrated with experimental results. The experimental tests were performed on wooden slabs exposed to a fire from below the element. The slabs were instrumented with thermocouples to measure the temperature at different control points along the fire duration in a fire resistance furnace, following the standard fire curve ISO 834. The advanced calculation model also allows the obtained the transient effect and incorporates the non-linear wood properties. The physical behaviour of the wooden slab is conditioned by the char layer formation, and this phenomenon is also considered in the advanced calculation model.
