Nonlinear finite element analysis was performed on specimens based on the axial compression test of ultra-high performance concrete encased high strength steel short column(steel strength is S690,UHPC strength is C130).The results of the finite element analysis are in good agreement with the experimental load displacement curve,the failure mode was identical and the peak load deviation is 8.9％.The peak strain deviation of the load-vertical strain curve and load-horizontal strain is 4.3％,which verifies the reliability of the modeling method indicating that the finite element mod-el can accurately predict its axial compression performance of the steel.The mechanical mechanism of the specimen was analyzed based on experimental and numerical simulation.Finally,the finite element model was utilized to investigate the effects of stirrup spacing parameters and steel wire mesh parameters on the axial compression properties.The results show that as the stirrup spacing increased,the peak axial load capacity of the specimen does not change,while the residual load capacity decreases.After the wire mesh is set,both the peak load capacity and residual load capacity of the specimen increase.
ultra high performance concreteconcrete encased steel short columnaxial compressive propertya-nalysis of nonlinear finite element
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