Open Access

ARTICLE

Study on the Dynamic Mechanical Damage Behavior of Concrete Based on the Phase-Field Model

Zhishui Sheng¹, Hong Jiang¹, Gang Liu², Fulai Zhang³, Wei Zhang^3,*

1 China Communications Construction Co., Ltd., Beijing, 100088, China
2 China Communications (Tianjin) Rail Transit Investment and Construction Co., Ltd., Tianjin, 300222, China
3 College of Civil Engineering, Fujian University of Technology, Fuzhou, 350118, China

* Corresponding Author: Wei Zhang. Email:

Structural Durability & Health Monitoring 2025, 19(3), 531-548. https://doi.org/10.32604/sdhm.2024.059662

Received 14 October 2024; Accepted 25 November 2024; Issue published 03 April 2025

Abstract

Concrete materials are employed extensively in a variety of large-scale structures due to their economic viability and superior mechanical properties. During the service life of concrete structures, they are inevitably subjected to damage from impact loading from natural disasters, such as earthquakes and storms. In recent years, the phase-field model has demonstrated exceptional capability in predicting the stochastic initiation, propagation, and bifurcation of cracks in materials. This study employs a phase-field model to focus on the rate dependency and failure response of concrete under impact deformation. A viscosity coefficient is introduced within the phase-field model to characterize the viscous behavior of dynamic crack propagation in concrete. The rate-dependent cohesive strength is defined within the yield function of concrete, where the rate sensitivity of cohesive strength facilitates the accumulation of the plastic driving force in the phase-field model. This process effectively captures the impact failure response of concrete. The applicability of the model was validated through unit cell experiments and numerical simulations of concrete under impact compression. Furthermore, the mechanical response and damage evolution mechanisms of concrete under impact loading were analyzed. It was observed that crack propagation in concrete initiates at material defects and, with increasing load, eventually develops in a direction perpendicular to the loading axis.

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Keywords

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