Modified Drucker-Prager model for circular concrete columns confined with FRP

doi:10.19936/j.cnki.2096-8000.20231028.009

Abstract

Abstract: In Drucker-Prager (DP) model, the parameters related to friction angle and cohesion determine the yield and hardening softening criteria, and the parameters related to dilation angle determine the flow rule. Through the statistical analysis of the test sample results, the influencing factors of the friction angle are determined, and the friction angle is defined as a function of plastic strain. Then the cohesive force model is updated by the yield criterion of DP model. By calculating the ratio of lateral plastic strain to axial plastic strain, the dilation angle model considering constraint stiffness ratio is established. Based on the USDFLD subroutine in ABAQUS, the parameters of the modified DP model are customized. The results show that the modified DP model can predict the stress-strain response of FRP confined concrete columns with certain accuracy.

Key words: FRP confined concrete, Drucker-Prager model, friction angle, cohesion, dilation angle, USDFLD, subroutine, composites

CLC Number:

TB332

ZHANG Luke, ZHANG Feng, ZHAO Guohao. Modified Drucker-Prager model for circular concrete columns confined with FRP[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(10): 60-68.

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