Abstract
Due to the influential mesostructure of lacustrine soft clay on the dynamic characteristic parameters, the dynamic shear modulus and damping ratio of the lacustrine soft clay are obtained by selecting different consolidation confining pressures for indoor resonance column test and scanning electron microscope (SEM) test, and the microstructure parameters of the lacustrine soft clay are acquired by analyzing the SEM image through the IPP (Image-Pro Plus) image processing software as well. By analyzing the relationship between some dynamic characteristic parameters and microstructure parameters is analyzed to explain the dynamic shear modulus and damping ratio from the perspective of soil microstructure characteristics. It is shown that the mean maximum dynamic shear modulus has a strong correlation with the maximum radius of the particles and the shape of the soil pores (abundance, circularity, fractal dimension), indicating that the size of the soil particles and the shape of the pores have a strong influence on dynamic shear modulus of soil; the correlation between the maximum damping ratio and the microstructure characteristics is weak, and the influence law is more complicated.
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This work was supported by the National Natural Science Foundation of China (Grant no. 51778207) and the Henan Key Laboratory of Special Protective Materials (Grant no. SZKFJJ202005).
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Li, Y., Yang, Z., Zhang, J., Zhao, Y., Du, C. (2022). Experimental Study on the Correlation Between Dynamic Properties and Microstructure of Lacustrine Soft Clay. In: Wang, L., Zhang, JM., Wang, R. (eds) Proceedings of the 4th International Conference on Performance Based Design in Earthquake Geotechnical Engineering (Beijing 2022). PBD-IV 2022. Geotechnical, Geological and Earthquake Engineering, vol 52. Springer, Cham. https://doi.org/10.1007/978-3-031-11898-2_187
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