Dynamic Response of Roadbed Soil Under Various Dynamic Load Waveforms

The cumulative deformation and fatigue failure of roadbeds induced by dynamic loads are fundamental considerations in road traffic design. To gain a more comprehensive understanding of the impact of drainage conditions and loading cycles on the performance of roadbeds composed of granite residual so...

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Bibliographic Details
Published in:Geotechnical and geological engineering 2024-09, Vol.42 (7), p.6237-6251
Main Authors: Zhang, Xin-Sheng, Chen, Yan-Ge, He, Chang-Biao, Li, Zhen, Liao, Lei, Cheng, Yun, Sun, Yin-Lei
Format: Article
Language:English
Subjects:
Civil Engineering
Cyclic loads
Deformation
Deformation effects
Dynamic characteristics
Dynamic loads
Dynamic response
Dynamic tests
Earth and Environmental Science
Earth Sciences
Fatigue failure
Fatigue tests
Geotechnical Engineering & Applied Earth Sciences
Hydrogeology
Original Paper
Parameter estimation
Pore pressure
Pore water pressure
Residual soils
Road beds
Sine waves
Soil
Soil stresses
Soil testing
Stress ratio
Terrestrial Pollution
Traffic
Traffic management
Triaxial tests
Waste Management/Waste Technology
Waveforms
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Summary:The cumulative deformation and fatigue failure of roadbeds induced by dynamic loads are fundamental considerations in road traffic design. To gain a more comprehensive understanding of the impact of drainage conditions and loading cycles on the performance of roadbeds composed of granite residual soil in southern China under various loading modes, this study conducted high-cycle dynamic triaxial tests using a DDS-70 dynamic triaxial apparatus. Through analysis of sample deformations, pore pressure development, and changes in critical cyclic stress ratio under different simulated waveforms, it was observed that the simulated waveform significantly influences the dynamic characteristics of the soil, with the half-sine wave proving effective in simulating the complex dynamic stress caused by traffic vehicles. Meanwhile, the study revealed uncertainties in the development of cumulative deformation under undrained conditions, thus indicating a need for dynamic tests to be conducted under drained conditions to more accurately replicate the effects of traffic loads. Additionally, the deformation of samples at 1000 cycles can serve as a crucial reference for estimating final deformation, which is essential for determining sample types and obtaining key parameters of foundation soil. This approach can help reduce testing workload and save time and costs.
ISSN:0960-3182
1573-1529
DOI:10.1007/s10706-024-02879-1