Abstract
Based on researches in material properties of reinforced concrete under high temperature, and combined with the whole process of fire, the fire-resistance test curve of building components suggested by ISO834 instead of the actual heating-up process. nonlinear transient temperature field simulates and analyses under fire of concrete frame columns based on Abaqus in this study. And temperature field distribution laws of column section are obtained. Conclusions of the paper are helpful to further understand of the mechanical properties of frame column under high temperature, and provide theoretical support for safety evaluation and reinforcement techniques of the structure after fire.
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