Exposed To Fire And Load Coupling Interaction And Deformation Analysis Of The Structure Of Reinforced Concrete Joist Conversion

With the rapid socio-economic development, the rapid development of high-rise buildings, building toward the body complex, versatile and comprehensive direction, thus corresponding structural forms are becoming increasingly complex and diverse. Residential, office, shopping malls, restaurants and other functional requirements of different architectural forms often appear in the same high-rise building, the different functions require different floors separated by a space, and the resulting changes in structure, which requires different structural forms structural conversion layer disposed between floors. With the city’s development process, as one of the main fire hazard threat has become more and more, the main component structural fire resistance capacity has become an important field of building fire safety and popular research topic. Conversion layer structure as a key nexus transfer structure, once the damage would jeopardize the security of the overall structure, therefore, to ensure their safety and to enhance its ability to withstand disasters to improve the reliability of the entire building structure is essential.In this paper, reinforced concrete corbels column switching structure fire resistance research. Using the ABAQUS finite element analysis software, two columns of reinforced concrete corbels were heat transfer structure coupling analysis, summarized its temperature distribution, deformation and internal force redistribution rules. Following major elements:(1) Based in ISO834standard temperature curve analysis of reinforced concrete corbels column transfer structure by fire conditions in different temperature distribution, summarizes the different reinforced concrete beams under fire conditions FER structure temperature distribution law.(2) Take the dead load coupled thermal heating mode and ISO834standard temperature curve of reinforced concrete beam structure model stud conversion at different operating conditions under coupled thermal deformation characteristics of the simulation analysis, analysis of the different working conditions by the fire of reinforced concrete corbels column switching structure deformation, summed up in the thermal coupling constant load warming reinforced concrete beam under FER structural deformation distribution.(3) For constant load temperature thermal coupling and ISO834standard temperature curve, calculation and analysis of reinforced concrete corbels column switching structural model moment, shear, axial force and bending moment relative, the relative shear, the relative axial force variation with the heating process characteristics, summed up the reinforced concrete corbels column transfer structure under the action of the thermal coupling member interactions and redistribution law.