Sensitivity analysis of blast resistance parameters for ultra high-performance concrete HJC model
Sensitivity analysis of material model parameters is essential for guiding the determination of material pa-rameters.In this study,a sensitivity analysis of HJC model parameters was conducted for UHPC under explosive loads.Nine parameters of the HJC model were classified,including Fc,A,B,N,SFMAX,εEFMIN,pl,μl and fs.Equivalent stress,displacement,and damage value were selected as evaluation indicators.Numerical simulation analysis of UHPC blast resistance tests was performed using LS-DYNA software.The results show that the sensitive parameters of the HJC model are fs,Fc,pl,μl,B and A,while the insensitive parameters are N,SFMAX and εEFMIN.Further analysis yielded a sensitivity ranking of parameters as Fc>B>A>pl>fs>μl.
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