Numerical simulation of basalt fiber concrete based on 3D mesoscale model
Based on the theory and experimental data of basalt fiber-mortar interface,a small diameter fiber-aggregate concrete model was proposed,the damage evolution of basalt fiber reinforced concrete(BFRC)and the mechanism of fiber reinforced concrete were studied.The mechanical property of BFRC,such as cubic compressive strength,splitting tensile strength,axial compressive strength and flexural strength,were predicted and verified by establishing a three-dimensional mesoscale random fiber-aggregate concrete model,then the damage evolution of concrete and the action mechanism of fiber were analyzed from the mesoscale view.The random fiber-aggregate concrete model with different distributions and different fiber contents was established,then the stability of mesoscale model and the effect of fiber contents on concrete were studied.The results show that the mesoscale model based on the method has high reliability in predicting the static mechanical property of BFRC.The damage of concrete occurs in the weak interfacial transition zone of the larger matrix deformation initially,then extends and connects with the increase of loading,and finally leads the overall failure of specimen.Basalt fiber has the restraint function of resisting matrix deformation,and obviously affects the mechanical property of concrete.When the fiber content is less than 1.5％,the mechanical property increases with the increase of fiber content.
NETL
NSTL
万方数据
维普
