硫酸钠侵蚀混凝土柱动态抗压特性试验研究

通过混凝土柱的轴心动态抗压试验,在10- 5～10-3 s-1应变速率范围内对比研究了硫酸钠侵蚀与未侵蚀混凝土本构关系的应变速率效应,分析了该效应对硫酸钠侵蚀与未侵蚀混凝土的抗压强度、弹性模量、峰值应变和吸能能力的影响.结果表明:随着应变速率的增加,混凝土的抗压强度也随之增加,受硫酸钠侵蚀混凝土抗压强度的应变速率敏感性...

Research on Dynamic Compressive Behavior of Plain Concrete Columns Suffering from Sulfate Attack

Axial compressive experiments for concrete specimens at different strain rates(10-510-3 s-1) were carried out for comparative study on the dynamic strength and deformation characteristics of concrete. The compressive strength, peak strain, elastic modulus and energy absorption capacity at different strain rates were discussed in detail. The experimental results show that, with increasing strain rate, the compressive strength, peak strain and energy absorption capacity were increased while elastic modulus had no obvious change. Further, the rate sensitivity of compressive strength of sulfate attack concrete was more sensitive than control concrete. In addition, the failure phenomenon of specimens was shown and discussed.