Abstract
The cyclic triaxial system is used to investigate the effects of confining pressure, initial shear stress, cyclic stress ratio, and vibration frequency on the dynamic strength characteristics of saturated sand in the Wenchuan area. Results show that when the vibration frequency is constant, the dynamic strength of sand increases with the increase of the consolidation ratio. However, when the consolidation ratio exceeds a certain value, the dynamic strength of sand decreases or increases slowly. The dynamic internal friction angle first increases and then decreases with the increase of consolidation ratio, and the dynamic internal friction angle under different initial shear stresses differs by a maximum of about 12%. When the failure cycles are constant, the dynamic strength and the dynamic internal friction angle of the sand increase with the increase of vibration frequency, and the dynamic internal friction angle at different frequencies differs by a maximum of about 7%. When the cyclic stress ratio is constant, the higher the vibration frequency, the greater the cycles required to achieve the failure. As the cyclic stress ratio decreases, the influence of the vibration frequency on the failure cycles is gradually reduced.
Highlights
China is an earthquake-prone country with a wide distribution of earthquakes. e earthquake in its southwestern part is strong
Test Results and Analysis e dynamic stress required to generate a specified failure criterion or meet a certain failure criterion when the soil is circulated under dynamic load is called the dynamic strength of the soil. e dynamic strength curve of soil is used to describe the relationship between dynamic stress and failure
It can be seen from the test results that when the failure cycles is constant, the larger the initial shear stress, the larger the dynamic strength of the sand
Summary
China is an earthquake-prone country with a wide distribution of earthquakes. e earthquake in its southwestern part is strong.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
