Study on constitutive relationship and damage characteristics of basalt fiber desert sand concrete
In order to effectively improve the utilization of desert sand resources,the influence of basalt fiber content(0,0.3%,0.4%,0.5%)on the constitutive relationship and damage characteristics of desert sand concrete was studied.Combined with the constitutive model,the stress-strain curve of basalt fiber desert sand concrete is fitted,the damage process of basalt fiber desert sand concrete is analyzed by using the acoustic emission event number,and the damage degree of basalt fiber desert sand concrete is evaluated by using the rate process theory.The results show that adding the proper amount of basalt fiber(0.4%)can reduce the damage to desert sand concrete members.The Carrerira J model is in good agreement with experimental data.At the same time,it is also found that the number of AE events will increase sharply when the component reaches the peak stress.Based on the rate process theory,the damage evolution curve established by the relationship between damage variable D and relative load V can be used to evaluate the damage degree of basalt fiber desert sand concrete.
basalt fiberdesert sand concreteacoustic emissionrate process theoryconstitutive relationship
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