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An experimental research on damping ratio and dynamic shear modulus ratio of frozen silty clay of the Qinghai-Tibet engineering corridor
Abstract Strong earthquakes occurred frequently in Qinghai-Tibet Plateau. Major national infrastructure facilities, including existing and proposed projects, are located densely in the permafrost engineering corridor of Qinghai-Tibet Plateau. Based on dynamic triaxial test under the effect of cycle loading for remolded frozen soil taken from Qinghai-Tibet engineering corridor, experimental studies on the influence of confining pressure, temperature, moisture content and frequency on damping ratio and dynamic shear modulus ratio have been carried out systematically. The results are summarized as follows: The damping ratio of frozen Qinghai-Tibet silty clay increases with increasing in confining pressure, temperature and water content, and decreasing in frequency. In addition, the dynamic shear modulus ratio reduces with increasing in confining pressure, temperature and water content, and decreasing in frequency. The relationship equation between the maximum dynamic shear modulus of frozen silty clay and temperature, water content and confining pressure is obtained by using multivariate non-linear fitting method, which shows a better fitting effect. The results of this research can provide basic data for the design of major engineering and seismic fortification along Qinghai-Tibet engineering corridor.
An experimental research on damping ratio and dynamic shear modulus ratio of frozen silty clay of the Qinghai-Tibet engineering corridor
Abstract Strong earthquakes occurred frequently in Qinghai-Tibet Plateau. Major national infrastructure facilities, including existing and proposed projects, are located densely in the permafrost engineering corridor of Qinghai-Tibet Plateau. Based on dynamic triaxial test under the effect of cycle loading for remolded frozen soil taken from Qinghai-Tibet engineering corridor, experimental studies on the influence of confining pressure, temperature, moisture content and frequency on damping ratio and dynamic shear modulus ratio have been carried out systematically. The results are summarized as follows: The damping ratio of frozen Qinghai-Tibet silty clay increases with increasing in confining pressure, temperature and water content, and decreasing in frequency. In addition, the dynamic shear modulus ratio reduces with increasing in confining pressure, temperature and water content, and decreasing in frequency. The relationship equation between the maximum dynamic shear modulus of frozen silty clay and temperature, water content and confining pressure is obtained by using multivariate non-linear fitting method, which shows a better fitting effect. The results of this research can provide basic data for the design of major engineering and seismic fortification along Qinghai-Tibet engineering corridor.
An experimental research on damping ratio and dynamic shear modulus ratio of frozen silty clay of the Qinghai-Tibet engineering corridor
Wu, Zhijian (author) / Zhang, Dan (author) / Zhao, Tao (author) / Ma, Jinlian (author) / Zhao, Duoyin (author)
2019-08-17
Article (Journal)
Electronic Resource
English
Experimental study on dynamic shear modulus of remolded frozen silty clay for Qinghai-Xizang Railway
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