Dynamic compression mechanical properties of basalt fiber reinforced concrete
A split Hopkinson pressure bar test device with a diameter of 50 mm was used to conduct dynamic compression tests on basalt fiber reinforced concrete(BFRC)with different basalt fiber contents of 0%,0.05%,0.1%,0.15%,and 0.2%under different gas pressures.The mechanical properties of BFRC under different strain rates were studied,the relationship between dynamic compressive strength and quasi-static com-pressive strength as well as impact toughness were analyzed to establish a dynamic constitutive model for BFRC.The results show that BFRC exhibits significant strain rate effect.The dynamic compressive strength and specific energy absorption increase first and then decrease with the increase of basalt fiber content,reaching the maximum value at a content of 0.1%.The growth factor of dynamic strength approximately increases linearly with the logarithm of strain rate.The dynamic constitutive model of BFRC fits well with the experimental and stress-strain curve results.
concretebasalt fibercompressive strengthimpact toughnessdynamic constitutive model
国家科技期刊平台
NSTL
万方数据
维普
