Load Analysis And Simplified Calculation Of The Reinforced Concrete Flexural Member After Fire

Fire prevention is always a long-term and arduous task for us humankind. Fire resistance of structures is an important and difficult problem in structural engineering.Reinforced concrete structures are one of the most familiar structures in structural engineering, in order to ensure that the work of reinforced concrete structures exposed to fire safety, reduce fire losses, fire-resistant design of building structures to determine the ultimate bearing capacity of the structure is very important.In this paper, reinforced concrete flexural members (ordinary concrete beams, steel reinforced concrete beams, prestressed steel reinforced concrete beams) as the research object, through the action by the fire after flexural reinforced concrete beams bearing performance analysis to explore the fire of reinforced concrete after high temperature beam bearing capacity calculation method, and then propose an improved capacity calculation. This paper studies the content and major achievements are as follows:1. Summary of reinforced concrete after high temperature mechanical properties of materials research, analysis of the literature by comparing the value of selecting the appropriate calculation parameters required for this article.2.Using the ABAQUS finite element analysis software for reinforced concrete beams under ISO standard temperature curve in Fire Simulation Analysis of Temperature Field by different time sections to determine the temperature distribution isotherms and reinforced the position of the temperature.3.The method of calculation based on the equivalent section after fire by reinforced concrete flexural components flexural strength, strength of concrete after high temperature raised three step model calculation method and the finite element method, the results agree well.4.The ordinary concrete after high temperature single-and dual-Beams Beams Flexural capacity were compared, discussed the configuration of compression reinforcement for reinforced concrete beams after high temperature Flexural capacity factor.