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本文通过对４４个棱柱体试件的应力．应变全过程及其变形指标的试验研究，分析了混凝土在经历不同高温（１００℃－６００℃）后应力一应变曲线各阶段的特点，并指出了高温后混凝土的变形特性与常温下混凝土的不同之处，最后建立了相应的应力一应变全曲线的方程描述。
This article passes stress on 44 prismatic specimens. The experimental study of the whole process of strain and its deformation index analyzes the characteristics of the stress-strain curve after different temperatures (100°C-600°C) of the concrete, and points out that the deformation characteristics of concrete after high temperature are different from that of concrete under normal temperature. At the end, a corresponding equation describing the stress-strain curve is established.