论文信息 - Constitutive Model for Concrete in Strain Space

Constitutive Model for Concrete in Strain Space

Concrete exhibits significant strain softening beyond the peak or initial failure stress. To incorporate this behavior and also reflect the entire failure process, a complete constitutive model is proposed within the framework of strain‐space plasticity, based on available experimental data and the known behavioral characteristics of concrete. It includes the initial yield and failure surfaces and the specific elastoplastic stress‐strain relationships in each stage, as well as the loading criterion and the hardening and softening functions. Criteria for multiaxial states of stress and strain are used to identify the final failure mode as either cracking, crushing, or mixed type. Based on the proposed constitutive model, a computer program for the three‐dimensional analysis of concrete structures was coded. In this program, a mixed‐iterative procedure is employed that combines variable stiffness and initial stress iterations. Two numerical examples demonstrate the proposed model's ability to reflect the el...

O. A. Pekau | Z. X. Zhang | Z. X. Zhang | G. Liu | G. T. Liu

[1] N. S. Ottosen,et al. Failure Strength and Elastic Limit for Concrete: A Comparative Study , 1979 .

[2] Wilfred D. Iwan,et al. On the Formulation of Strain-Space Plasticity With Multiple Loading Surfaces , 1981 .

[3] S. Pietruszczak,et al. An elastoplastic constitutive model for concrete , 1988 .

[4] Edward C. Ting,et al. Constitutive Models for Concrete Structures , 1980 .

[5] Wai-Fah Chen,et al. Constitutive modeling in analysis of concrete structures , 1987 .

[6] J. C. Simo,et al. Strain- and stress-based continuum damage models—I. Formulation , 1987 .

[7] Wai-Fah Chen,et al. A plastic-softening model for concrete materials , 1989 .

[8] P. M. Naghdi,et al. On the Nonequivalence of the Stress Space and Strain Space Formulations of Plasticity Theory , 1983 .

[9] Wai-Fah Chen,et al. Strain-space plasticity formulation for hardening-softening materials with elastoplastic coupling , 1986 .

[10] W. Chen,et al. A nonuniform hardening plasticity model for concrete materials , 1985 .

[11] D. C. Drucker. Some implications of work hardening and ideal plasticity , 1950 .

[12] Byung H. Oh,et al. Microplane Model for Progressive Fracture of Concrete and Rock , 1985 .

[13] Edward C. Ting,et al. An Elastic-Fracture Model for Concrete , 1979 .