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Foundation analysis and design
01 Jan 1968-
TL;DR: In this paper, Fondation de soutenagement et al. presented a reference record for Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08.
Abstract: Keywords: Fondation ; Mur de soutenement ; Pieux ; Capacite portante ; Ancrage ; Dimensionnement Reference Record created on 2004-09-07, modified on 2016-08-08
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TL;DR: In this article, the seismic vulnerability of a representative Mamluk-style minaret, namely Manjaq Al-Yusufi (1349 A.D.), is investigated and some seismic protection techniques are proposed and evaluated.
Abstract: During the Egypt/Dahshur 1992 earthquake, a large number of historical Islamic minarets, especially those built during the Mamluk era, were significantly damaged. The level of damage in Mamluk-style minarets was assigned to their massive size, and their irregular distribution of mass and stiffness along their heights. In this paper, the seismic vulnerability of a representative Mamluk-style minaret, namely Manjaq Al-Yusufi (1349 A.D.) is investigated and some seismic protection techniques are proposed and evaluated. Geometrical, material, and geotechnical data were determined at the site. A realistic three-dimensional finite element model of the minaret that reflects those properties was constructed. Ambient vibration tests were then performed on the minaret, and its modal parameters such as fundamental periods and mode shapes were obtained. The ambient vibration test results were then used to update the finite element model. The seismic hazard at the minaret location was evaluated, and a seismic risk study of the minaret was performed with the conclusion that the minarets will be highly vulnerable during moderate earthquakes. A seismic protection technique that includes the use of high damping rubber bearings HDRB and vertical steel anchoring bars is proposed and evaluated. The proposed technique was found to efficiently reduce the seismic risk of the minaret under investigation. Copyright © 2004 John Wiley & Sons, Ltd.
36 citations
TL;DR: In this paper, Artificial Neural Network analyses (ANN) were conducted to obtain the best model for the prediction of pile settlement, and the relative importance of input parameters has been evaluated using senility analysis.
Abstract: Several theoretical and experimental methods are available to estimate pile settlement. Due to difficulties for obtaining undisturbed samples, many of these methods have been focused on in-situ tests. The cone penetration test is one of the most effective in-situ tests because of its geometrical analogy with the piles as well as presenting continuous results along the depth. In this study, 1300 recorded settlement data from 101 pile loading tests with the CPT results were collected. Then Artificial Neural Network analyses (ANN) were conducted to obtain the best model for the prediction of pile settlement. The relative importance of input parameters has been evaluated using senility analysis. Accuracy predictions of the proposed model, along with other classic methods, were compared with the recorded values from the loading tests with the aid of different statistical parameters. This comparison indicated the superiority of the proposed model over previous methods. A parametric study has also been performed for the input parameters to study the consistency of the suggested model.
35 citations
TL;DR: In this paper, the complex interaction mechanisms involving the foundational components (raft, piles and soil) are numerically investigated by means of 3D finite elements analyses, accounting for soil nonlinearity.
35 citations
TL;DR: In this article, a variational model for axially loaded piers is presented to obtain the displacement and forces in the pier along its axial direction, which is suitable for similar analyses of pile foundations.
Abstract: A variational model for the analysis of axially loaded piers is presented. A closed-form solution technique employing an iterative procedure, is developed to obtain the displacement and forces in the pier along its axial direction. The method is suitable for similar analyses of pile foundations. It is shown that displacements and the load distribution along the axis of the pier compare well with a more sophisticated finite element solution. Furthermore, the new model complements the well-known Reese model 1 employing t-z curves for the analysis of settlement of axially loaded piers. This new formulation using continuum mechanics principles, distributes the work done by the applied load as compressive strain energy in the pier, and as shear strain energy in the soil, as well as, the compressive strain energy in the soil surrounding the pier and at the bottom of the pier.
35 citations