期刊
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
卷 49, 期 3-4, 页码 445-456出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijsolstr.2011.10.002
关键词
Drucker-Prager plasticity model; FRP confined concrete; Friction angle; Cohesion; Plastic dilation
类别
资金
- Research Grants Council of the Hong Kong Special Administrative Region, China [CityU 123711]
- Professor JG Teng's group
Existing research works have established that Drucker-Prager (DP) plasticity model is capable of modeling stress-strain behavior of confined concrete. However, accuracy of the model largely depends on adequate evaluation of its parameters that determine the yield criterion, hardening/softening rule and flow rule. Through careful analytical studies of test results of FRP confined concrete columns under theoretical framework of the DP model, it is found that: (1) the hardening/softening rule is governed by plastic strains and the FRP stiffness ratio; (2) the friction angle decreases slightly with an increase in plastic deformation; and (3) the plastic dilation angle is a function of both axial plastic strain and the FRP stiffness ratio. Explicit models for these properties are developed from analytical studies. By implementing the proposed models in ABAQUS, finite element analyses can well predict stress-strain responses of FRP confined concrete columns. (C) 2011 Elsevier Ltd. All rights reserved.
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