Analysis On Fire Resistance Performance Of Composite Deck Slabs

Because of Composite deck slabs have the following advantages: stiffness, ductility,seismic performance, short construction period and so on, it is applied to some high-risebuildings of steel-concrete composite structure in our country. But nowadays the researchabout fire-resistance of profiled steel sheeting-concrete slabs is relatively less. The fireresistance test is not only costly but also time consuming, so the numerical method to predictthe fire bearing capacity of the structure has been broad-based development, the main work ofthis paper is as follows:1. Using ANSYS to analyze the temperature field of Composite deck slabs on fire, andcomparing with the experimental results, they are in good agreement. It is indicating thereliability of modeling method.2. Establishing two-dimensional heating model and changing the heating curve,comparing with the original temperature field results of the model and analyzing theinfluence no the temperature field simulation result of the change of model and thetemperature rising curve. Changing the parameters of the composite deck slab and simulatingthe temperature field of composite deck slab. Comparing with the original case and analyzingthe influence to structure temperature field distribution of the change of the parameters.3. After getting more accurate temperature data, use stress-strain relation of concrete andsteel in high temperature and corresponding high temperature mechanical properties toanalyze the fire resistance of composite deck slabs on fire and compare with the experimentalresults.4. Establish two span continuous slabs, chang the parameters of composite deck slabs,analyze the influence to the fire resistance of parameter changes, analyze continuous slabsdeflection and the stress distribution rule in the different fire conditions, and summarize thefire resistance and rule of composite deck slabs.