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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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01 Jan 2011
TL;DR: Nishaat et al. as discussed by the authors showed that the failure surfaces she observed in the sands did not resemble those predicted by Terzaghi and Meyerhof's models, which made it difficult for Nishaat to observe the stress distributions, the failure mechanism and the exact extent of plastic deformation.
Abstract: Previous studies carried out by Nishaat (2009) and Nyamutale (2009) showed that Terzaghi's bearing capacity model did not adequately predict the bearing capacity failure in soils [1]. Nishaat carried out her investigation on Philippi Dune sands using a physical model that was built in a geotechnical laboratory. The failure surfaces she observed in the sands did not resemble those predicted by Terzaghi and Meyerhof's models. However the use of a physical model limited how many things she could observe like the failure mechanism, the exact extent of plastic deformation and the stress distribution. In this study a simulation of the laboratory experiments done by Nishaat was developed. The simulation had the same failure load, similar patterns of plastic deformation and illustrated a failure mechanism that was different from that predicted by Terzaghi’s model. Keywords: Bearing capacity failure, Philippi Dune sand, Terzaghi 1. Introduction All engineered construction resting on the earth must be carried by a foundation which transmits to, and into, the underlying soil or rock the loads from the structure above [2]. A properly designed foundation should generate stresses in the ground that are within safe levels and the resulting settlement of the structure should be within acceptable limits. Karl Terzaghi (1883 – 1963), known as the father of soil mechanics, developed a theory that estimates the failure load of the soil [1]. He developed his theory using analytical models and by making assumptions about the behavior of the soil. Previous research by Nishaat (2009), using a physical model (Figure 1), showed that Terzaghi and Meyerhof’s theoretical models didn't resemble the failure surfaces that were observed during the laboratory tests (Figure 2). These models overestimated the extent of the shear planes and the lateral dimensions of the failure zone. However the use of a physical model made it difficult for Nishaat to observe the stress distributions, the failure mechanism and the exact extent of plastic deformation. In this study a simulation of the laboratory tests done by Nishaat was developed to give further insight into the failure mechanisms of sands.
Book ChapterDOI
01 Jul 2018
TL;DR: In this paper, the role of microgeometry in forming the piezoelectric sensitivity and anisotropy of the Piezo-active composites with various connectivity patterns is analyzed.
Abstract: Piezoelectric coefficients dij are most widespread to describe the piezoelectric effect, electromechanical properties and other related parameters. The effective piezoelectric coefficients \(d_{ij}^{*}\) and their links to sensitivity are discussed for piezo-active composites with various connectivity patterns. Examples of the piezoelectric sensitivity of the 2–2-type, 1–3-type, 1–1-type, 0–3-type, and 3–β composites based on ferroelectics are considered. The role of the microgeometry in forming the piezoelectric sensitivity and anisotropy of the piezoelectric coefficients \(d_{3j}^{*}\) is analysed. Ways to improve the piezoelectric sensitivity in terms of \(d_{ij}^{*}\) are discussed in connection with potential piezotechnical applications.
01 Jan 1993

Cites background or methods from "Foundation analysis and design"

  • ...The calculated pile deformation was composed of concrete compression and elastic settlement of the rock at the base of the shaft (Bowles, 1988)....

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  • ...Incremental load in the caisson cross-section at the instrument elevations were computed from the change in strain and the sectional properties of the caisson (Dunnicliff, 1988; Bowles, 1988)....

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Peer Review
TL;DR: An in-depth review presents a summarization of all the online publications including research articles, conference papers, and theses to the best of authors’ knowledge on the topic of RC cantilever retaining wall optimization with a focus on improving its applicability and assimilation into the construction industry.
Abstract: e booming growth of computational abilities in the 21st century has led to its assimilation and bene„t in all horizons of engineering. For civil engineers, these advancements have led to groundbreaking technologies such as BIM, automation, and optimization. Unfortunately, even in an era of dwindling resources and dire need for sustainability, optimization has failed to attract implementation in practice. Despite an exponential growth as an area of research interest, the optimization of engineering structures such as reinforced concrete (RC) is still a complex task that requires multidisciplinary knowledge, hindering its practicability. Although past review papers have delved into this topic, they have only been able to cover the breadth of information available by covering broader aspects of optimization of structures. is study on the other hand aims to cover this topic in depth to uncover problem speci„c trends and issues, by focusing only on optimization of RC cantilever retaining walls. Although there is an abundance of research studies on this topic, there is an absence of any critical review to tie them up, and concurrently with its broader scope, it su’ers the same lack of applicability in the „eld. e in-depth review presents a summarization of all the online publications including research articles, conference papers, and theses to the best of authors’ knowledge on the topic of RC cantilever retaining wall optimization. Geographical trends, regional developments, and prominent journals have been identi„ed. e design codes, problem formulation, objectives, constraints, variables, and their optimization techniques are tabulated for ease of understanding. Unique areas of development investigated by the di’erent researchers have been highlighted. Lastly, comprehensive recommendations for future works have been detailed with a focus on improving its applicability and assimilation into the construction industry.