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Nhan đề: Factor Affecting Horizontal Subgrade Reaction of Piles during Soil Liquefaction and Lateral Spreading
Tác giả: Suzuki, Hiroko
Tokimatsu, Kohji
Sato, Masayoshi
Abe, Akio
Từ khoá: Piles
Rivers and streams
Soil liquefaction
Pore water
Pore pressure
Water pressure
Năm xuất bản: 2006
Tóm tắt: The mechanism of subgrade reaction development in liquefied and laterally spreading ground is discussed through large shaking table tests. With increasing relative displacement, the extension stress state develops on one side of a pile with significant pore water pressure reduction, while the compression stress state develops on the other side with insignificant pore water pressure reduction. The subgrade reaction is induced by the difference in stress sates in both sides, i.e., the pile is pulled by the soil on the extension side. In liquefied level ground, a pile is pulled by the soil on right and left sides alternately because the extension and compression stress states alternately develop on both sides. In laterally spreading ground, a pile is pulled only by the downstream soil because the extension stress state develops on the downstream side of the pile only when the ground moves downstream. The subgrade reaction in the laterally spreading ground consists of cyclic as well as permanent components, of which contribution depends on pile stiffness. The cyclic one with pore water pressure reduction, induced by the cyclic ground deformation, becomes large in stiff piles, while the permanent one, induced by the permanent ground deformation, becomes large in flexible piles.
Mô tả: Conference Information Workshop on Seismic Performance and Simulation of Pile Foundations in Liquefied and Laterally Spreading Ground March 16-18, 2005 | University of California, Davis, California, United States © 2006 American Society of Civil Engineers
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