Fire Resistance Analysis Of Reinforced Concrete Frame Column

For a long time, Fire prevention has been one of the most arduous tast. As research for thefire resistance performance of pillar is the foundation of the fire resistance to the whole concreteframework, the study on the resistance performance of pillar is of great importance.In this work, fire resistant curve of structural member suggested by ISO834is adopted toanalogue the heating process. Through the structural finite element analysis method, usingABAQUS thermodynamics finite element analysis software for the nonlinear transienttemperature field simulation and analysis of concrete columns surrounded by the fire.Obtainetemperature curve of framework column internal nodes and temperature of nodes in the firelasting a certain time, draw the isothermal curve according to temperature, summarize thediscipline of temperature, analyze the factors of affecting cross-section temperature field.Based on the study of the framework internal cross-section temperature field, Combinedwith the basic principles of reinforced concrete, summarize the formula of the equivalent fireload, calculate fire resistance of reinforced concrete framework columns according to hightemperature ultimate bearing capacity, verified the feasibility of the formula through the casestudy, and analyze the factors of affecting framework columns safety performance in the fire bycalculating. According to the theoretical foundation, calculate and analyze the failure process offramework beams and framework columns of a single structure under the uniform fire,summarize that Structural design should follow the principle of "strong side column, weakmiddle column" under fire load, obtain framework columns to the overall structure impactAccording to calculation and analysis of the overall framework structure.