Numerical Analysis of the Fire Resistance Limit of the Side Joints of Composite Frame with Corrugated Steel Web
The finite element analysis software ABAQUS was used to establish the analysis model of the side joints of corrugated steel web frame under the four-sided fire according to the ISO834 standard heating curve.The temperature field distribution of the beam,column,and joint core section was analyzed,and the calculated values of the temperature-time curve and the displacement-time curve of the joint were compared with the test values.The influence of the fire load ratio of the beam end and the column top,the reinforcement ratio of the beam section,and the steel content of the column section on the fire resistance limit of the joints was studied under different section sizes.The results show that the fire load ratio of the beam end and the column top has a significant effect on the fire resistance limit of the side joints,and the larger the load ratio,the smaller the fire resistance limit.When the column is damaged at the node,the fire resistance limit of the joint increases with the reinforcement ratio of the beam section and the steel content of the column section.When the beam is damaged at the joint,the reinforcement ratio of the beam section and the steel content of the column section have little effect on the fire resistance limit.Increasing the size of the beam-column section of the joint is obviously helpful to improve the fire resistance limit of the joint.
corrugated steel webfinite element analysisside jointsfire resistance limitmode of destruction
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