基于改进Drucker-Prager准则的GFRP管约束高强混凝土短柱单轴压缩分析模型 postprint

Abstract:
In view of the glass fiber reinforced polymer(GFRP)tube loading characteristics of high strength concrete short column and the large shear zone of the traditional Drucker-Prager rule,this paper puts forward an improved Drucker-Prager type plastic constraint model of high strength concrete.In order to improve the prediction accuracy of axial and circumferential stress-strain curves under uniaxial compression of high-strength concrete short columns constrained by GFRP tubes,concrete hardening/softening criteria and uncorrelated flow criteria were considered.The new model was used in ANSYS software to simulate the mechanical properties of high-strength concrete short columns constrained by GFRP tubes.The comparison between the finite element analysis results and the test results shows that the stress-strain curves of the two columns are in good agreement with the structural failure mode,and the proposed model is reasonable and reliable.This study can provide theoretical reference for the design of FRP tube confined high strength concrete.