![]() ![]() (2001) Modelling of heated composite floor slabs with reference to the Cardington experiments. doi: 10.1155/2014/468510Ĭhan YN, Peng GF, Anson M (1999) Residual strength and pore structure of high-strength concrete and normal strength concrete after exposure to high temperatures. Kodur V (2014) Properties of concrete at elevated temperatures. Neves IC, Rodrigues JPC, Loureiro ADP (1996) Mechanical properties of reinforcing and prestressing steels after heating. Pantousa D, Mistakidis E (2013) Advanced modeling of composite slabs with thin-walled steel sheeting submitted to fire. (2018) Thermal performance of composite slabs with profiled steel decking exposed to fire effects. The load-bearing of composite slabs with steel deck under natural fires. It was also noticed that the lowest load-bearing capacity of the composite slabs was reached after the end of the heating phase, showing that the stability of the element during the heating phase does not guarantee fire safety during the cooling phase.Ĭitation: Marcílio M. Moreover, it was observed that different heating rates and different cooling rates influence the rate of the reduction and recovery of the load-bearing capacity. The results showed that the highest variation in the load-bearing resistance of composite slabs occurs when the steel temperatures are between 20 and 600 ℃, after this temperature, the steel has already lost most of its mechanical strength. In some circumstances, the residual load-bearing can be reduced by more than 20%. A new proposal is also presented to evaluate the residual load-bearing capacity. This method includes a time step procedure, based on the average temperature calculation for each component, including the reduction coefficients applied to the design strength of each material. This research presents the validation of the numerical model and the development of a parametric study, to evaluate the load-bearing capacity during the fire event. In short fire events, with limited deformations, the composite slabs can recover the load-bearing capacity during the cooling stage. Unprotected composite slabs may be exposed to natural fire conditions from below, and steel reduces its load-bearing capacity during the heating stage. ![]() Composite slabs with steel deck combine the load-bearing resistance of the steel deck and rebar with the compressive resistance of the concrete (components). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |