Establishment of Three-Dimensional Mesoscale Model of Concrete and Simulation of Uniaxial Mechanical Behavior

DOI

10.2991/978-94-6463-793-9_34How to use a DOI?

Keywords

Microscopic models of concrete; aggregate modeling; uniaxial compression

Abstract

This study investigates the mesoscale damage and mechanical behavior of concrete under loading by establishing a three-dimensional mesoscale model and conducting uniaxial compression simulations. Traditional methods are insufficient in accurately capturing crack propagation, stiffness degradation, and stress distribution within concrete. However, mesoscale numerical simulation methods, known for their efficiency and precision, have emerged as effective tools for studying the failure process of concrete. Based on the random distribution characteristics of aggregate size and spatial position, this research employs Python for secondary development of ABAQUS, integrating micromechanics of composite materials to develop algorithms for generating and placing coarse aggregates. The Mersenne Twister algorithm is utilized to generate random numbers, ensuring the randomness of aggregate placement. Additionally, the study adopts a three-dimensional aggregate grading theory based on the Fuller curve to optimize the distribution of aggregates. During model construction, polyhedral aggregates are generated using point-based random shape control methods and planar topology techniques, and the convexity of aggregates is determined using vector methods to avoid the formation of sharp angles and thin flake-like aggregates. Interference between aggregates and between aggregates and boundaries is judged by calculating the distances between aggregate centers and between aggregates and boundaries, enabling the batch placement of aggregates. Simulation results indicate that concrete with different aggregate shapes exhibits distinct stress–strain relationships and failure modes. Concrete with spherical aggregates has the highest peak strength and can still withstand certain stress after failure, while concrete with irregular polyhedral aggregates shows more rapid crack development and lower residual strength. The findings of this study provide a theoretical basis and reference for the engineering design and performance evaluation of concrete structures.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Lin Hua
AU  - Jiwu Yang
AU  - Yali Wang
AU  - Yanbao Huang
AU  - T. B. Liu
PY  - 2025
DA  - 2025/07/28
TI  - Establishment of Three-Dimensional Mesoscale Model of Concrete and Simulation of Uniaxial Mechanical Behavior
BT  - Proceedings of the 2025 8th International Conference on Traffic Transportation and Civil Architecture (ICTTCA 2025)
PB  - Atlantis Press
SP  - 390
EP  - 405
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-793-9_34
DO  - 10.2991/978-94-6463-793-9_34
ID  - Hua2025
ER  -