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对高温后再生混凝土圆柱体试件(Ф100×200mm)进行了常规三轴加载试验,获得了高温后再生混凝土应力-应变全过程曲线,拟合了高温后再生混凝土三轴受压本构方程.结果表明:在单向应力下,高温后再生混凝土应力-应变全过程曲线有比较明显的尖峰.随着侧向围压的增加,高温后再生混凝土应力-应变全过程曲线逐渐变得平缓和丰满.高温后再生混凝土三轴受压本构关系曲线变化趋势与普通混凝土类似.所拟合出的高温后再生混凝土三轴受压本构方程能较好拟合试验结果.
The conventional triaxial loading test of recycled concrete cylinder specimen (Ф100 × 200mm) after high temperature was carried out. The whole stress-strain curves of regenerated concrete after high temperature were obtained and the constitutive equation of triaxial compression of recycled concrete after high temperature was fitted. The results show that under the unidirectional stress, the stress-strain curve of recycled concrete has obvious peaks after high temperature, and the stress-strain curve of regenerated concrete becomes gentle and full with the increase of lateral confining pressure The trend of the constitutive relation curve of recycled concrete after high temperature is similar to that of ordinary concrete.The fitting constitutive equation of three-axis compression of recycled concrete after high temperature can fit well the experimental results.