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Elastoplastic Constitutive Modeling for Reinforced Concrete in Ordinary State-Based Peridynamics

Published online by Cambridge University Press:  23 October 2020

Tianyi Li
Affiliation:
Department of Engineering Mechanics, College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Xin Gu
Affiliation:
Department of Engineering Mechanics, College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Qing Zhang
Affiliation:
Department of Engineering Mechanics, College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Xiaozhou Xia
Affiliation:
Department of Engineering Mechanics, College of Mechanics and Materials, Hohai University, Nanjing 211100, China
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Abstract

A non-local, ordinary state-based, peridynamic elastoplastic model is formulated to numerically simulate the fracture of reinforced concrete materials. Several basic definitions are first discussed to avoid confusion; and then, a detailed derivation of the force vector state is presented, leading to a unified expression of force state for one-, two- and three-dimensional elasticity problems. Furthermore, an ordinary state-based peridynamic (OSB PD) elastoplastic analysis approach is developed for both plastic compressible and incompressible materials, including the constitutive relationship, the yield function, the consistency condition and the plasticity flow rule. The peridynamic predictions of a quasi-static deformation of the steel rods are in good agreement with the analytical solution. Moreover, the OSB PD plasticity is verified by analyzing a square plate with or without a central hole suffering different loading-unloading paths. Finally, a two dimensional reinforced concrete clamped beam subjected to impact loading is simulated with the proposed OSB PD elastoplasticity, demonstrating its capability in capturing the damage characteristics and structural failure behavior. Simulation results show good accuracy of the peridynamics in simulating elastoplastic problems.

Type
Research Article
Copyright
Copyright © 2020 The Society of Theoretical and Applied Mechanics

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Footnotes

Tianyi Li and Xin Gu contribute equally to the article.

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