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P -y curves for liquefied sand subje...

Gerber, Travis Max.

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P -y curves for liquefied sand subject to cyclic loading based on testing of full-scale deep foundations.

Record Type:	Electronic resources : Monograph/item
Title/Author:	P -y curves for liquefied sand subject to cyclic loading based on testing of full-scale deep foundations./
Author:	Gerber, Travis Max.
Description:	300 p.
Notes:	Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2301.
Contained By:	Dissertation Abstracts International64-05B.
Subject:	Engineering, Civil. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3091440
ISBN:	9780496391493

P -y curves for liquefied sand subject to cyclic loading based on testing of full-scale deep foundations.
Gerber, Travis Max.

P -y curves for liquefied sand subject to cyclic loading based on testing of full-scale deep foundations. - 300 p.

Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2301.

Thesis (Ph.D.)--Brigham Young University, 2003.

This item must not be sold to any third party vendors.

Soil liquefaction is known to significantly reduce the lateral resistance of deep foundations. A review of the literature indicates that load-displacement relationships for liquefied sand are poorly defined with a divergence of opinions and research results. To help improve this situation, research consisting of full-scale foundation testing was conducted to develop p-y curves for liquefied sands.

ISBN: 9780496391493Subjects--Topical Terms:

783781
Engineering, Civil.

P -y curves for liquefied sand subject to cyclic loading based on testing of full-scale deep foundations.
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020 $a 9780496391493
035 $a (MiAaPQ)AAI3091440
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100 1 $a Gerber, Travis Max. $3 3170730
245 1 0 $a P -y curves for liquefied sand subject to cyclic loading based on testing of full-scale deep foundations.
300 $a 300 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2301.
500 $a Adviser: Kyle M. Rollins.
502 $a Thesis (Ph.D.)--Brigham Young University, 2003.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a Soil liquefaction is known to significantly reduce the lateral resistance of deep foundations. A review of the literature indicates that load-displacement relationships for liquefied sand are poorly defined with a divergence of opinions and research results. To help improve this situation, research consisting of full-scale foundation testing was conducted to develop p-y curves for liquefied sands.
520 $a As part of the Treasure Island Liquefaction Test (TILT) program, a single pipe pile and a 3 x 3 pile group were tested by cyclically loading the piles laterally after downhole explosives were detonated to induce liquefaction. Excess pore pressure ratios of approximately 100% were achieved, indicating that the surrounding loose to medium dense sands had liquefied. Additional cyclic lateral load tests were performed periodically as pore pressures dissipated. P-y curves were derived for fully liquefied soil and soil with residual excess pore pressures.
520 $a The following conclusions are made: (1) P-y curves for liquefied sand are characterized by a concave-up load-displacement shape where the slope of the curve increases as displacement increases. This shape is similar to that observed in cyclic shear testing of sands. In contrast, p-y curves for non-liquefied sands and clays typically have a concave-down shape. (2) This characteristic concave-up load-displacement shape appears to result primarily from dilative behavior during shearing, although gapping effects may also contribute to the observed response. (3) P-y curves for liquefied sand stiffen with increasing depth and dissipation of excess pore pressures. The p-y curve shape appears to transition from concave-up to concave-down as pore pressures decrease. (4) The derived p-y curves for fully liquefied sand are significantly different from p-y curves prescribed by both the residual undrained shear strength and p-multiplier design approaches. The derived p-y curves yield better predictions of measured bending moment and deflection over a wider range of load than the p-y curves of these other design approaches.
520 $a An empirically derived equation has been developed to describe the observed load-displacement response of fully liquefied sand. P-y curves developed with this equation and used in conventional lateral pile analyses provide reasonable estimates of the measured response of full-scale piles in liquefied sand.
590 $a School code: 0022.
650 4 $a Engineering, Civil. $3 783781
650 4 $a Geotechnology. $3 1018558
690 $a 0543
690 $a 0428
710 2 $a Brigham Young University. $3 1017451
773 0 $t Dissertation Abstracts International $g 64-05B.
790 $a 0022
791 $a Ph.D.
792 $a 2003
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3091440