Finite Element Analysis Of Underground Garage Girderless Floor Affected By Fire

Girderless floor architecture because only pillars and floor, ceiling height dimensions can effectively save room in today’s housing construction in more applications, especially the underground garage of some high-rise buildings, but with the continued growth of the domestic vehicle car because of the oil, the aging and other reasons caused the car ignition event year after year, continuous high temperature mechanical properties of reinforced concrete structures will decrease, leading to reduced bearing capacity of the structure, affect the performance of the overall security and stability of the structure, so the reinforced concrete fire resistance without beam floor structure system analysis becomes a moment to focus on work. In this paper, reinforced concrete Girderless floor structure of the underground garage for instance, the application of finite element ANSYS software architecture of the heat-structure coupling analysis, numerical simulation results of displacement and stress changes in the structure of the system, so the system fire performance evaluation. This paper carried out the following tasks:1. In accordance with the relevant literature, and familiar with the theory of finite element ANSYS thermal analysis, thermal conduction clear manner and apply the appropriate conditions for the latter part of the numerical simulation of thermal analysis using finite element ANSYS software without beam floor structure system for the foundation.2. ANSYS finite element software without beam floor structure at room temperature, the system is simulated results of displacement and stress distribution in the structure of the system, accurately determine the weakest part of the architecture, targeted analysis of the structural system deformation and carrying capacity.3. The enhanced due to temperature thermal and mechanical properties of reinforced concrete decreased by finite element software ANSYS under fire floor without beam structural system was simulated using the international standard temperature curve to obtain the temperature field of the structural system, then through the heat-draw their displacement and stress distribution structure coupling analysis, according to the relevant literature, critical fire resistance of the structure system.The above work can hope for today’s housing construction Beam Floor no application architecture to provide some reference, and hope to provide some reference for the fire resistance of reinforced concrete structures.