東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Evaluation of shallow foundation dis...

Elhakim, Amr Farouk.

Linked to FindBook

Google Book

Amazon

博客來

Evaluation of shallow foundation displacements using soil small-strain stiffness.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Evaluation of shallow foundation displacements using soil small-strain stiffness./
Author:	Elhakim, Amr Farouk.
Description:	433 p.
Notes:	Source: Dissertation Abstracts International, Volume: 66-07, Section: B, page: 3842.
Contained By:	Dissertation Abstracts International66-07B.
Subject:	Engineering, Civil. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3183194
ISBN:	9780542242946

Evaluation of shallow foundation displacements using soil small-strain stiffness.
Elhakim, Amr Farouk.

Evaluation of shallow foundation displacements using soil small-strain stiffness. - 433 p.

Source: Dissertation Abstracts International, Volume: 66-07, Section: B, page: 3842.

Thesis (Ph.D.)--Georgia Institute of Technology, 2005.

Foundation performance is controlled significantly by the stress-strain behavior of the underlying soils. For geomaterials, the small-strain shear modulus Gmax is a fundamental stiffness applicable to both monotonic static and dynamic loading conditions, as well to both drained and undrained loading. Yet, Gmax is too stiff for direct use in computing foundation displacements. The main objectives of this research are to: (1) explore the scaled parallelism between the stress-strain-strength behavior of the single soil element response and the load-displacement-capacity of a shallow foundation system supported on soil; (2) develop a methodology for evaluating the performance of vertically-loaded footings using a rational framework based on the small-strain modulus Gmax, large-strain strength (tau max or su) and strain at failure (gammaf); and (3) calibrate the proposed method using a foundation database of full-scale load tests under both undrained and drained conditions.

ISBN: 9780542242946Subjects--Topical Terms:

783781
Engineering, Civil.

Evaluation of shallow foundation displacements using soil small-strain stiffness.
LDR:03458nmm 2200289 4500 001 1827318
005 20061222092046.5
008 130610s2005 eng d
020 $a 9780542242946
035 $a (UnM)AAI3183194
035 $a AAI3183194
040 $a UnM $c UnM
100 1 $a Elhakim, Amr Farouk. $3 1916250
245 1 0 $a Evaluation of shallow foundation displacements using soil small-strain stiffness.
300 $a 433 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-07, Section: B, page: 3842.
500 $a Director: Paul W. Mayne.
502 $a Thesis (Ph.D.)--Georgia Institute of Technology, 2005.
520 $a Foundation performance is controlled significantly by the stress-strain behavior of the underlying soils. For geomaterials, the small-strain shear modulus Gmax is a fundamental stiffness applicable to both monotonic static and dynamic loading conditions, as well to both drained and undrained loading. Yet, Gmax is too stiff for direct use in computing foundation displacements. The main objectives of this research are to: (1) explore the scaled parallelism between the stress-strain-strength behavior of the single soil element response and the load-displacement-capacity of a shallow foundation system supported on soil; (2) develop a methodology for evaluating the performance of vertically-loaded footings using a rational framework based on the small-strain modulus Gmax, large-strain strength (tau max or su) and strain at failure (gammaf); and (3) calibrate the proposed method using a foundation database of full-scale load tests under both undrained and drained conditions.
520 $a In geotechnical practice, foundation bearing capacity is handled as a limit plasticity calculation, while footing displacements are evaluated separately via elastic continuum solutions. Herein, a hybrid approach is derived that combines these two facets into a closed-form analytical solution for vertical load-deflection-capacity based on numerical studies. Here, a non-linear elastic-plastic soil model was developed to simulate the stress-strain-strength curves for simple shearing mode (LOGNEP) for each soil element. The model was encoded into a subroutine within the finite difference program FLAC. A large mesh was used to generate load-displacement curves under circular and strip footings for undrained and drained loading conditions. With proper normalization, parametric foundation response curves were generated for a variety of initial stiffnesses, shear strengths, and degrees of non-linearity in the soil stress-strain-strength response. Soil stress-strain non linearity is described by a logarithmic function (Puzrin & Burland, 1996, 1998) that utilizes a normalized strain x L that relates strain at failure gammaf, shear strength (taumax or su), and small-strain stiffness G max, all having physical meaning. A closed-form algorithm is proposed for generating non-linear load-displacement curves for footings and mats within an equivalent elastic framework. The proposed method was calibrated using a database of well-documented footing load tests where soil input parameters were available from laboratory and/or in-situ field test results.
590 $a School code: 0078.
650 4 $a Engineering, Civil. $3 783781
650 4 $a Geotechnology. $3 1018558
690 $a 0543
690 $a 0428
710 2 0 $a Georgia Institute of Technology. $3 696730
773 0 $t Dissertation Abstracts International $g 66-07B.
790 1 0 $a Mayne, Paul W., $e advisor
790 $a 0078
791 $a Ph.D.
792 $a 2005
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3183194