CONSTITUTIVE MODELING OF CONCRETE MATERIALS FOR ENGINEERING APPLICATIONS
Abstract
Constitutive modeling of concrete materials is investigated from the view of practical engineering applications. Three fairly simple mathematical constitutive models are developed. They are rigorously formulated and implemented to several well-known failure functions or yield functions. Incremental stress-strain relationships are given explicitly for a direct computer implementation. Stress-strain responses are predicted using these material models, and results are compared with well-documented experimental results. The models are coded in NFAP (a general purpose large nonlinear finite element program) currently available on Purdue's computing system. Several existing constitutive models for concrete materials are also reviewed, and their capability and applicability are evaluated through the stress-strain predictions. Practical usage of these models are studied and discussed. Using the NFAP program combined with the material models as developed herein, heavily reinforced concrete cylindrical structures are analyzed. Through the NFAP analysis of typical structural engineering problems, the newly developed material models together with some existing models are examined and evaluated at the structural analysis level. Finally, a summary evaluation of these models is presented.
Degree
Ph.D.
Subject Area
Civil engineering
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