论文题目：Bender element measurement for small-strain shear modulus of compacted loess

作者：Fangtong Wang (王方同), Dianqing Li (李典庆), Wenqi Du (杜文琪), Chia Zarei, Yong Liu (刘勇)

作者单位：

State Key Laboratory of Water Resources and Hydropower Engineering Science, Institute of Engineering Risk and Disaster Prevention, Wuhan University, 299 Bayi Road, Wuhan, 430072, PR China. 

杂志：International Journal of Geomechanics

DOI: 10.1061/(ASCE)GM.1943-5622.0002004

APA引用格式：Wang F.T., Li D.Q., Du W.Q., Zarei C., & Liu Y. (2021). Bender Element Measurement for Small-Strain Shear Modulus of Compacted Loess. International Journal of Geomechanics, 21(5), 04021063.

摘要：

This study investigated the small-strain shear modulus behavior of compacted loess under isotropic consolidation. The small-strain shear modulus was obtained from bender element tests during the isotropic consolidation. The effects of excitation frequency, stress level and stress history on small-strain shear modulus were analyzed. The test results suggested that the excitation frequency affects the measured values of shear wave velocity. An interval of wave path length to wavelength ratio was proposed to select the appropriate excitation frequency. Based on the test results, the effect of the stress level and stress history on the small-strain shear modulus of normally consolidated and overconsolidated soil was examined, whereby an empirical model was proposed to characterize the variation of small-strain shear modulus. The logarithmic law relationship mitigates the limitation in existing models that the power law relationship is incapable to accurately predict the small-strain shear modulus for cases with large overconsolidation ratios. Finally, a framework was established to account for the effects of excitation frequency, stress level and stress history on the small-strain shear modulus of compacted loess.