scispace - formally typeset
Search or ask a question
Book

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
Citations
More filters
Journal ArticleDOI
28 Jun 2020
TL;DR: In this paper, the authors studied the seismic behavior of water tanks during earthquakes and found that the important factors that influence the seismic behaviour of such structures are the dynamic properties of the tank itself, the structure-soil system and the excitation time history.
Abstract:  Abstract— Elevated water tanks are generally used to provide a high fluid pressure before distribution through pipe network. This may be the most economic mean to control the water distribution to different locations with the needed pressure. During earthquakes, the elevated water tanks have a very important role because the contained water can be used to resist fires which generally occur after earthquakes. Small numbers of researches have been done on the seismic behavior of this type of structures compared to the importance of the problem. The important factors that influence the seismic behavior of such structures are the dynamic properties of the tank itself, the structure-soil system and the excitation time history. Soil type

1 citations

01 Jan 2005
TL;DR: In this paper, the influence of non-uniform subgrade support on pavement responses (stress and deflection) that affect pavement performance was investigated, and the authors concluded that subgrade/subbase stiffness increases localized deflections and causes principal stress concentrations in the pavement, leading to fatigue cracking and other types of pavement distresses.
Abstract: To provide insight into subgrade non-uniformity and its effects on pavement performance, this study investigated the influence of non-uniform subgrade support on pavement responses (stress and deflection) that affect pavement performance. Several reconstructed portland cement concrete (PCC) pavement projects in Iowa were studied to document and evaluate the influence of subgrade/subbase non-uniformity on pavement performance. In situ field tests were performed at 12 sites to determine the subgrade/subbase engineering properties and develop a database of engineering parameter values for statistical and numerical analysis. Results of stiffness, moisture and density, strength, and soil classification were used to determine the spatial variability of a given property. Natural subgrade soils, fly ash-stabilized subgrade, reclaimed hydrated fly ash subbase, and granular subbase were studied. The influence of the spatial variability of subgrade/subbase on pavement performance was then evaluated by modeling the elastic properties of the pavement and subgrade using the ISLAB2000 finite element analysis program. A major conclusion from this study is that non-uniform subgrade/subbase stiffness increases localized deflections and causes principal stress concentrations in the pavement, which can lead to fatigue cracking and other types of pavement distresses. Field data show that hydrated fly ash, self-cementing fly ash-stabilized subgrade, and granular subbases exhibit lower variability than natural subgrade soils. Pavement life should be increased through the use of more uniform subgrade support. Subgrade/subbase construction in the future should consider uniformity as a key to long-term pavement performance.

1 citations


Cites background or methods from "Foundation analysis and design"

  • ...Bowles (1996) noted that the plate load test required to obtain k is an expensive, time consuming test requiring large loads to produce small deflections....

    [...]

  • ...The foundation parameter, k, is determined by dividing the change in stress by the change in deflection (Bowles 1996)....

    [...]

  • ...The modulus values were first converted to English units and then the reduced Vesic equation (from Bowles 1996) was applied to estimate the modulus of subgrade reaction....

    [...]

Journal ArticleDOI
01 Jan 2020
TL;DR: In this paper, a linear numerical model of the structure-foundation-soil-stone column was simulated using the ABAQUS and it was shown that with the increase of the length of stone columns a decrease in settlement occurred, while the increase more than a specific threshold had no significant effect to decrease the uplift and settlement.
Abstract: Natural soil in engineering practices is not always considered to bear loads of above structures. In such a way, it is necessary to improve the quality of the soil before any constructions. Tanks are the structures that apply significant load to the beneath soil and they are usually constructed with circular foundations in shape. Seismic loads can apply irremediable damages to the structures and sometimes tanks are the highly important infrastructures during earthquakes. One of the most techniques that has been recently widely used on soft deposits and loose finegrained soils is stone columns or singular piles. The stone columns increase the strength of loose soils and also decrease settlements induced by applying the loads. In this study, a linear numerical model of the structure-foundation-soil-stone column was simulated using the ABAQUS. Results show that with the increase of the length of stone columns a decrease in settlement occurred, while the increase of length more than a specific threshold had no significant effect to decrease the uplift and settlement.

1 citations


Cites background from "Foundation analysis and design"

  • ...Laboratory investigations have been conducted on the use of lime and fly ash columns to increase the bearing capacity and also decrease settlements of clays [10]....

    [...]

Journal ArticleDOI
01 Jul 2022-Heliyon
TL;DR: In this paper , the influence of introducing high-speed vehicles on the generation and propagation of vibrations through the free field and the impact on the wayside buildings was investigated in Lisbon's urban area.

1 citations