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Liquefaction-induced lateral spreading and its effects on pile foundations.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Liquefaction-induced lateral spreading and its effects on pile foundations./
作者:	He, Liangcai.
面頁冊數:	1 online resource (402 pages)
附註:	Source: Dissertations Abstracts International, Volume: 68-03, Section: B.
Contained By:	Dissertations Abstracts International68-03B.
標題:	Civil engineering. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3208640click for full text (PQDT)
ISBN:	9780542572142

Liquefaction-induced lateral spreading and its effects on pile foundations.
He, Liangcai.

Liquefaction-induced lateral spreading and its effects on pile foundations. - 1 online resource (402 pages)

Source: Dissertations Abstracts International, Volume: 68-03, Section: B.

Thesis (Ph.D.)--University of California, San Diego, 2005.

Includes bibliographical references

Liquefaction-induced lateral spreading has caused substantial damage to pile foundations. Large uncertainties remain regarding lateral spreading and its effects on pile foundations. Of special concern are the associated maximum soil pressure on piles due to lateral spreading, and the potential relevance of vertical earthquake ground motions. To address these issues, the characteristics of vertical motions were first investigated. Effects of these motions on lateral spreading were subsequently examined by a finite element study. To improve the understanding of pile behavior during lateral spreading, a unique set of large scale one-g shake-table data was analyzed. Within this scope, six experiments were conducted to augment data from additional tests in Japan. A three-dimensional solid-fluid fully coupled dynamic finite element study was also conducted. It was found that significant high frequency prevailed in all seismic vertical motion records. Site distance from source had a noticeable effect on spectral shape. A simple one-dimensional vertical wave propagation model did not appear adequate for modeling available seismic downhole array records. For the studied saturated ground scenario and earthquake motions, the inclusion of vertical component resulted in significantly larger lateral displacement. Data from the shake-table experiments showed that maximum lateral soil pressure on piles was found to occur immediately upon liquefaction. This pressure was found to be considerably higher than some current recommendations. A liquefied passive pressure procedure is proposed based on the results of the experiments. In this procedure, a small friction angle of about 3° was found to characterize the strength of liquefied soils. In the observed response, a reduction factor of about 0.5 was found to crudely account for pile group effects and shadowing effects. Finite element simulations show apparent pile pinning effects that may significantly reduce the extent of lateral spreading of the ground.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9780542572142Subjects--Topical Terms:

860360
Civil engineering.
Subjects--Index Terms:

Lateral spreadingIndex Terms--Genre/Form:

542853
Electronic books.

Liquefaction-induced lateral spreading and its effects on pile foundations.
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