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

With the rapid development of economy and society, residential, office, shopping malls, restaurants and other different functions in an integrated multi-purpose building came into being, the conversion of reinforced concrete structures are emerging. Due to fire action would seriously weaken the bearing capacity of reinforced concrete structures, the conversion structure as an important and critical part of maintaining the structural safety of the building, if the fire will suffer a serious threat to the security of the whole structure, therefore, to carry out the conversion of reinforced concrete structures under high temperature fire bearer of the study has important practical significance. This article focused on the conversion of reinforced concrete corbels column structure, with respect to fire performance is affected by the vertical force under constant load coupling effect research, investigate under mechanical loads, the heating time of the fire grows, reinforced concrete beam column transfer distribution of deformation structures. In this paper, one is based on a large amount of literature on the current steel and concrete materials on the major findings in the performance of thermal and mechanical properties at elevated temperatures were reviewed. Second, the combination of a large span actual conversion in structural engineering, built a reinforced concrete beam specimens of stud conversion structure model, using ISO834standard temperature curve, with the ABAQUS finite element analysis software, the conversion of different structural models were affected by the fire conditions, different heating time structure temperature field analysis, to study the distribution of temperature field changes with different thermal conditions by converting the structural model. Third, the mechanical load applied vertically reinforced concrete corbels column transfer structure model, and then using ISO834standard heating temperature curve, using ABAQUS finite element analysis software, changes in the deformation under fire conditions to convert different structural models with heating time were the analysis and calculation, research and summarize the reinforced concrete corbels column transfer structure fire temperature and vertical coupling constant load deformation under the law. The results of this study and related analysis and conclusions, will further explore the reinforced concrete beam column transfer structure deformation behavior at high temperature under fire lay the foundation.