The Internal Force Analysis Of The Structure Of Reinforced Concrete Joist Conversion Under The Coupled Action Of Fire And The Load

With the rapid development of economic and social, residential, office, shopping, dining and other different function in a body’s comprehensive multi-functional building arises at the historic moment, reinforced concrete transition structure.Due to high temperature fire effect will seriously weaken the bearing capacity of reinforced concrete structure, transform structure as an important and key part to the safety of building structure, if the fire will seriously threats the safety of the whole structure, therefore, to carry out the fire of reinforced concrete under high temperature conversion structure bearing research has important practical significance.This article mainly aimed at the beam column reinforced concrete conversion structure, high temperature fire and under the coupled action of vertical load bearing performance research, explore the mechanical loads, as the growth of the fire heating time, the reinforced concrete beam column transfer structure’s internal force change and the rule of the internal force redistribution.This article is based on a large number of literature, is the current of steel and concrete materials under high temperature thermal properties and mechanical properties of the main research results are reviewed.Engineering combined with a real big span structure, establish a common reinforced concrete beam column transfer structure model, USES the ISO834standard heating up curve, with the aid of the finite element analysis software ABAQUS, the model structure of the transformation of different fire conditions, different heating time the structure of the temperature field analysis, studied the different fire conditions is transformed structure change and the distribution of temperature field of the model.Three is the reinforced concrete beam column transfer structure model on vertical mechanical load, then USES the ISO834standard heating up curve, using the finite element analysis software ABAQUS, with different fire conditions is transformed structure model of the internal force distribution along with the change of heating time are analyzed and calculated, studies and summarizes the reinforced concrete beam column transfer structure model in high temperature fire and the vertical constant load under the coupled action of internal force variation law and the rule of the internal force redistribution.Relevant achievements of research and analysis and conclusion, this paper will in order to further explore the reinforced concrete beam column transfer structure in high temperature mechanical behavior under the action of fire.