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为了研究水饱和情况下混凝土性能(相比于自然湿度混凝土)的变化情况,对不同应变速率时的自然湿度和水饱和混凝土做了常规三轴应力作用下的抗压试验,得到了不同湿度混凝土的应力应变全曲线,分析了不同湿度混凝土的峰值应力与应变、割线弹性模量,并基于损伤力学研究了混凝土的力学损伤特性。研究结果表明,常规三轴压缩状态下水饱和混凝土相同应变所对应的应力值较自然湿度混凝土小,即相同应变作用下水饱和混凝土较自然湿度混凝土破坏严重,这种状态将一直持续到混凝土破坏为止。
In order to study the change of concrete performance (compared with natural humidity concrete) under water saturation condition, the compressive tests of natural moisture and water-saturated concrete under different triaxial strain under normal triaxial stress were carried out. The concrete with different humidity The stress-strain curves of concrete were analyzed. The peak stress and strain and secant elastic modulus of concrete with different humidity were analyzed. The mechanical damage characteristics of concrete were also studied based on damage mechanics. The results show that the stress corresponding to the same strain of water-saturated concrete under conventional triaxial compression is smaller than that of natural concrete, that is, the water-saturated concrete is destroyed more seriously than the natural concrete under the same strain, which will continue until the concrete is damaged.