Chen, Liuxin, Ghorbani, Javad, Dutta, Troyee Tanu, Sounthararajah, Arooran, Jesudasan, Arjoon Moses, and Kodikara, Jayantha (2024) Application of an Advanced Constitutive Model for Shakedown Analysis in Unbound Pavements. In: Lecture Notes in Civil Engineering (407) pp. 121-128. From: ICTG 2024: 5th International Conference on Transportation Geotechnics: Fundamentals of Road, Rail, and Harbour Geotechnics, 20-22 November 2024, Sydney, NSW, Australia.

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Abstract

This study uses a cutting-edge constitutive model for analysing shakedown phenomena in unsaturated granular soils commonly used in lightly and moderately trafficked pavements. The primary source of structural support in these pavements comes from granular soils used in the subbase and the subgrade soil. This highlights the crucial role of accurately evaluating their mechanical properties for optimum design and use of materials. Our model successfully captures material kinematic hardening with memory and provides more accurate simulations of the hydromechanical shakedown in these soils under millions of load cycles. The model also addresses some key computational challenges associated with a large number of load cycles, such as potential numerical instability and a significant loss of accuracy. The model’s capabilities are showcased, highlighting its proficiency in simulating soil plastic deformations. This is particularly demonstrated in a novel laboratory test, the constant radial stiffness triaxial (CRST) test, designed to mimic traffic loading on unbound pavements. It is argued that this test better simulates the stress path encountered by road materials under moving traffic loads in the field than the traditional repeated load triaxial (RLT) test.

Item ID:	85639
Item Type:	Conference Item (Research - E1)
ISSN:	2366-2557
Copyright Information:	© The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.
Date Deposited:	03 Jun 2025 00:07
FoR Codes:	35 COMMERCE, MANAGEMENT, TOURISM AND SERVICES > 3509 Transportation, logistics and supply chains > 350908 Road transportation and freight services @ 25% 35 COMMERCE, MANAGEMENT, TOURISM AND SERVICES > 3509 Transportation, logistics and supply chains > 350999 Transportation, logistics and supply chains not elsewhere classified @ 25% 40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering @ 50%
SEO Codes:	27 TRANSPORT > 2702 Environmentally sustainable transport activities > 270299 Environmentally sustainable transport activities not elsewhere classified @ 50% 27 TRANSPORT > 2799 Other transport > 279999 Other transport not elsewhere classified @ 50%
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