Density Driven Damage Mechanics (D3-M) Model for Concrete II: Fully Coupled Chemo-Mechanical Damage

Published

July 23, 2020

Author(s)

Pavitra Murrua, Zachary Grasley, Christa Torrence, KR Rajagopal, Edward Garboczi

Abstract

In Part I, a density driven damage mechanics (D3-M) approach and its application to model mechanical damage in concrete are presented. In this study, chemical and chemo-mechanical damage in concrete are modeled using the D3- M approach. It is proposed that reductions in local density in certain regions, created when concrete is subjected to chemical attack or a coupled chemicalmechanical loading, result in reduced sti ness and strength of the material. The D3-M modeling approach stands out among the past e orts to predict the response of concrete to mechanical and chemical loading scenarios due to its ability to e ectively model the mechanical, chemical, and coupled mechanical-chemical responses of concrete using a consistent framework and a single constitutive equation for both types of damage. Model simulations indicate that the response of the material to a scenario where chemical and mechanical loads are acting simultaneously cannot be considered equivalent to the response obtained by superposing the separate responses to independent mechanical and chemical loads.

Citation

International Journal of Pavement Engineering

Volume

23

Issue

4

Pub Type

Journals

Download Paper

DOI Link

Keywords

Leaching, Coupled load, Density, Continuum damage mechanics, chemical attack

Citation

Murrua, P. , Grasley, Z. , Torrence, C. , Rajagopal, K. and Garboczi, E. (2020), Density Driven Damage Mechanics (D3-M) Model for Concrete II: Fully Coupled Chemo-Mechanical Damage, International Journal of Pavement Engineering, [online], https://doi.org/10.1080/10298436.2020.1793984 (Accessed December 5, 2024)