Study on lateral force of underground structure considering rheological effect ofliquefaction ground

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (19) : 58-62.

ZUO Xi 1,2, ZHOU En-quan 3, REN Yan 2

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Abstract

Regarding liquefied soil as fluid and using vector method analyzed liquefaction velocity field which is based on the principle of fluid mechanics, and it also solved velocity field by vector signal operation method. Thus, it is concluded that the analytical expression of underground structure affected by lateral forces in the liquefaction flow site. Finally, it also needs to do analysis about the parameter sensitivity of the analytical expression. The results show that lateral force of underground structure contains pressure and frictional when liquefied soils flow in lateral. Lateral force is mainly composed of inertial force and damping force, and it is related to fluid density, fluid viscosity, tunnel radius and vibration frequency of structures. With the increase of fluid density, fluid viscosity and tunnel radius, added mass and added damping are increasing gradually. Within a certain range, added mass and added damping are more sensitive to vibration frequency.

Key words

rheological effect / liquefied soils / underground structure / lateral force

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ZUO Xi 1,2, ZHOU En-quan 3, REN Yan 2. Study on lateral force of underground structure considering rheological effect ofliquefaction ground[J]. Journal of Vibration and Shock, 2016, 35(19): 58-62

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