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A Study of the Dynamic Characteristics of Red Sandstone Residual Soils Based on SHPB Tests

  • Geotechnical Engineering
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Abstract

To explore the response characteristics of soil under dynamic loads, cyclic impact tests with varying axial compressions and impact velocities were conducted using SHPB tests. The test results were analyzed to study the mechanical properties and energy dissipation characteristics due to impact loads. In terms of mechanical properties, for the same impact times, the peak stress of the specimen with axial compression was found to be greater than that without axial compression, but the final strain was lower than that without axial compression, indicating that axial compression affects the peak stress and final strain of the specimen. The dynamic stress strengthening of the specimen under cyclic impact loads has also been analyzed. In terms of energy dissipation, the effects of axial compression, impact velocity, and impact times on the ratios of dissipated energy, reflected energy, and transmitted energy to incident energy were compared, and it was found that the ratio of the dissipated energy did not exceed 24% under any condition. In terms of damage evolution, the damage variable gradually decreases with an increase in impact times. A critical value of the damage variable was determined, above which the transmittance continued to decrease, the reflectivity gradually increased, and the dissipation rate remained stable.

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Acknowledgments

The authors thank the Project Foundation of Department of Housing and Urban Rural Development of Shaanxi Province (2019-K39), Innovation Capability Support Plan of Shaanxi Province Innovation Team (2020TD-005). The Natural Science Foundation of Shaanxi Province (2019JQ-756).

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Correspondence to Zhanping Song.

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Wang, T., Song, Z., Yang, J. et al. A Study of the Dynamic Characteristics of Red Sandstone Residual Soils Based on SHPB Tests. KSCE J Civ Eng 25, 1705–1717 (2021). https://doi.org/10.1007/s12205-021-1469-8

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  • DOI: https://doi.org/10.1007/s12205-021-1469-8

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