000011070 001__ 11070
000011070 005__ 20141205155833.0
000011070 04107 $$aeng
000011070 046__ $$k2008-10-12
000011070 100__ $$aMotamed, Ramin
000011070 24500 $$aShaking Model Tests on Behavior of Group Piles Undergoing Lateral Flow of Liquefied Subsoil

000011070 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011070 260__ $$b
000011070 506__ $$arestricted
000011070 520__ $$2eng$$aThis study addresses shaking model tests which concerns group pile models subjected to lateral flow of liquefied soil. The main objective of this research was on the magnitude of lateral load exerted by the soil flow, with emphasis on the distribution of the load to individual piles. Model tests employed three kinds of group pile which consisted of 33, 66, and 1111 piles. They revealed the following important points. Firstly, the displacement of the ground surface around a pile decreases within a few times of the pile radius. Hence, due to the overlapping of the range of pile influence between two adjacent piles, the entire lateral load decreases as the pile spacing becomes smaller. What is important is that the magnitude of the lateral load on individual piles in the front row (the upstream side of the group pile) as well as on the most downstream side (rear row) takes the maximum value. In contrast, the piles inside the group pile undergo less magnitude of lateral load. Then, a practical distribution of lateral loads on individual piles is proposed. Consequently, it becomes possible to protect existing group pile from lateral pile by installing additional rows of piles in front and back. Next, the variation of the lateral load with the relative displacement and the velocity between piles and soil was studied. Both small and large pile group model tests showed better correlation between the load and the velocity than the displacement. This implies the viscous nature of liquefied sand. This experimental finding strongly supports the analytical method in which the seismic performance of liquefied soil and mitigative measures are assessed by the idealization of liquefied sand as viscous liquid.

000011070 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011070 653__ $$aLiquefaction, Large Lateral Flow, Pile Groups

000011070 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011070 720__ $$aMotamed, Ramin$$iSesov, Vlatko$$iTowhata, Ikuo
000011070 8560_ $$ffischerc@itam.cas.cz
000011070 8564_ $$s1745942$$uhttps://invenio.itam.cas.cz/record/11070/files/04-02-0069.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 04-02-0069.
000011070 962__ $$r9324
000011070 980__ $$aPAPER