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Shaking table scale model tests of n...

Meymand, Philip James,

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Shaking table scale model tests of nonlinear soil-pile-superstructure interaction in soft clay /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Shaking table scale model tests of nonlinear soil-pile-superstructure interaction in soft clay // Philip James Meymand.
Author:	Meymand, Philip James,
Description:	1 electronic resource (462 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 60-12, Section: B.
Contained By:	Dissertations Abstracts International60-12B.
Subject:	Civil engineering. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9922971
ISBN:	9780599225411

Shaking table scale model tests of nonlinear soil-pile-superstructure interaction in soft clay /
Meymand, Philip James,

Shaking table scale model tests of nonlinear soil-pile-superstructure interaction in soft clay /Philip James Meymand. - 1 electronic resource (462 pages)

Source: Dissertations Abstracts International, Volume: 60-12, Section: B.

A significant number of cases of damage to piles and pile-supported structures during earthquakes have been observed, but few instrumented records of the response and performance of such structures during earthquakes have been obtained. To expand the database of pile performance during strong shaking, a series of scale model shaking table tests of model piles in soft clay was performed. This research effort had the goals of providing insight into a variety of soil-pile-supestructure interaction (SSPSI) topics, and generating a data set with which to calibrate advanced SSPSI analysis tools being developed at U.C. Berkeley in a parallel effort. The single piles were seen to respond with components of inertial and kinematic interaction, with the inertial components producing upper bound bending moments. The response of pile groups was highly frequency dependent, which calls into question the applicability of applying pseudo-static analyses to such problems. Pile cap and free field motion variations illustrated wave scattering effects and the necessity of developing modified foundation input motions for substructuring analyses. Moderate effects of pile cap embedment were observed, particularly in contributing to pile group rocking stiffness. The influences of two-directional shaking were seen to be minimal, as structural inertial forces tended to resolve the motion to a strong axis for the simple single degree of freedom models tested. For single piles, full perimeter soil resistance was not engaged, as the piles preferentially followed gaps developed in previous cycles. Estimates of pile head lateral stiffness derived from a suite of pile head loading tests differed over a wide range, and were a function of loading level and consequent soil-pile nonlinearity. The methods examined for computing dynamic stiffness from elastic theory provided unrealistically high estimates of stiffness for the model tests. Appropriately selected secant stiffness values from the static lateral load tests provided more realistic descriptions of the observed soil-pile dynamic response for moderate levels of shaking. ATC-32 chart solutions provided marginally acceptable lower bound pile head stiffness estimates for very strong shaking events. (Abstract shortened by UMI.).

English

ISBN: 9780599225411Subjects--Topical Terms:

860360
Civil engineering.
Subjects--Index Terms:

Clay

Shaking table scale model tests of nonlinear soil-pile-superstructure interaction in soft clay /
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100 1 $a Meymand, Philip James, $e author. $3 3765947
245 1 0 $a Shaking table scale model tests of nonlinear soil-pile-superstructure interaction in soft clay / $c Philip James Meymand.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 1998
300 $a 1 electronic resource (462 pages)
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500 $a Source: Dissertations Abstracts International, Volume: 60-12, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisors: Riemer, Michael F.
502 $b Ph.D. $c University of California, Berkeley $d 1998.
520 $a A significant number of cases of damage to piles and pile-supported structures during earthquakes have been observed, but few instrumented records of the response and performance of such structures during earthquakes have been obtained. To expand the database of pile performance during strong shaking, a series of scale model shaking table tests of model piles in soft clay was performed. This research effort had the goals of providing insight into a variety of soil-pile-supestructure interaction (SSPSI) topics, and generating a data set with which to calibrate advanced SSPSI analysis tools being developed at U.C. Berkeley in a parallel effort. The single piles were seen to respond with components of inertial and kinematic interaction, with the inertial components producing upper bound bending moments. The response of pile groups was highly frequency dependent, which calls into question the applicability of applying pseudo-static analyses to such problems. Pile cap and free field motion variations illustrated wave scattering effects and the necessity of developing modified foundation input motions for substructuring analyses. Moderate effects of pile cap embedment were observed, particularly in contributing to pile group rocking stiffness. The influences of two-directional shaking were seen to be minimal, as structural inertial forces tended to resolve the motion to a strong axis for the simple single degree of freedom models tested. For single piles, full perimeter soil resistance was not engaged, as the piles preferentially followed gaps developed in previous cycles. Estimates of pile head lateral stiffness derived from a suite of pile head loading tests differed over a wide range, and were a function of loading level and consequent soil-pile nonlinearity. The methods examined for computing dynamic stiffness from elastic theory provided unrealistically high estimates of stiffness for the model tests. Appropriately selected secant stiffness values from the static lateral load tests provided more realistic descriptions of the observed soil-pile dynamic response for moderate levels of shaking. ATC-32 chart solutions provided marginally acceptable lower bound pile head stiffness estimates for very strong shaking events. (Abstract shortened by UMI.).
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650 4 $a Civil engineering. $3 860360
650 4 $a Mechanics. $3 525881
650 4 $a Environmental engineering. $3 548583
653 $a Clay
653 $a Shaking table
653 $a Soil-pile-superstructure
690 $a 0543
690 $a 0346
690 $a 0775
710 2 $a University of California, Berkeley. $e degree granting institution. $3 3765948
720 1 $a Riemer, Michael F. $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 60-12B.
790 $a 0028
791 $a Ph.D.
792 $a 1998
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9922971