本文以槽钢为主要研究对象，假定材料为理想弹塑性体，在ANSYS中建立其有限元模型。
The main study object of the paper is channel steel whose finite element models are founded in ANSYS the material is assumed as elastic-plastic body.
研究结果表明火灾中钢构件内力分析时，可把构件视为理想的弹塑性体；
The results show that steel structure member can be regarded as ideal elastic-plasticity body when analyzing its internal force in fire.
对两端固定的工字钢短柱的温度应力进行试验研究，给出的温度应力估算公式与试验结果符合性较好。研究结果表明火灾中钢构件内力分析时，可把构件视为理想的弹塑性体；
The temperature stress of I-profile short axially-restricted column is studied, a regression formula of temperature stress is proposed, and it agrees well with the experimental results.
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