自然湿度及水饱和状态下混凝土率效应的试验研究

Experimental Study on Rate Effect of Concrete under Natural Humidity and Water-saturated Conditions

对尺寸为ф300 mm×600 mm的自然湿度及水饱和圆柱体混凝土试件进行了4种应变速率(10^(-5)、10^(-4)、10^(-3)、10^(-2)s^(-1))下的静动态单轴压缩试验。试验结果表明,混凝土的强度随加载速率的增大而增大,水饱和混凝土比自然湿度混凝土强度要低。两种湿度混凝土的峰值应变、弹性模量随加载速率的增加总体呈增大的趋势。

The static and dynamic uniaxial compression tests of cylindrical concrete specimen with a dimensions of φ300 mm× 600 mm under natural humidity and water-saturated conditions are conducted by four kinds of strain rate of 10 ^-5, 10^ -4, 10^-3,s^- 1 and 10^-2s-1. The test results show that the concrete strength increases with the increasing of loading rate, tile compressive strength of concrete under water-saturated condition is lower than that under natural humidity condition. The peak strain and elasticity modulus of two concretes appear an increasing trend with the increasing of loading rate.