PLASTICITY-BASED MODELING AND ANALYSIS OF CONCRETE STRUCTURES
Abstract
In recent years, a large number of plasticity-based constitutive models have been proposed for the characterization of concrete behavior. The models usually follow the classical approaches of plasticity theories, with loading functions and hardening rules specially designed for concrete. The primary objective of the present study is to evaluate several commonly-used plasticity-based models with different loading functions, and to compare their predictions with experimental results. Five loading functions are considered. They are: (i) the Mises model, (ii) the Drucker-Prager model, (iii) the Bresler-Pister model, (iv) the Hsieh-Ting-Chen four parameter model, and (v) the Willam-Warnke five parameter model. A modified Mises model and a dual function model are also proposed, as a result of the comparative study. A general purpose dynamic computer code STRAW-P1 has been developed for the elastic-plastic-fracture analysis of concrete structures. Four material models, namely the Mises model (including the modified Mises model), the Hsieh-Ting-Chen model, the Willam-Warnke model as well as the dual function model have been implemented in STRAW-P1. Post-fracture behavior of concrete is modeled using a linear anisotropic elastic theory and a crushing coefficient criterion. The results of three benchmark problems, including the predictions of load-displacement responses, as well as the crack and the yield patterns of different plasticity-based models are compared. Transient solutions of an impact problem are also presented.
Degree
Ph.D.
Subject Area
Civil engineering
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