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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 study, unsupervised clustering algorithms were employed to classify the SPT standard penetration resistance value (SPT-N) in the field by taking the classification system of Terzaghi and Peck (1967) into consideration and showed that the input parameters were successful for classifying the SPt-N value to an acceptable degree of strength attribute.
Abstract: The standard penetration test (SPT) is the most common test conducted in the field, and it is used to determine in situ properties of different soils. Although it is a matter of debate, these tests are also used for the determination of the consistency of fine-grained soils, whereby the test results can also be utilized to establish numerous empirical correlations to predict the strength of soils in the field. In this study, unsupervised clustering algorithms were employed to classify the SPT standard penetration resistance value (SPT-N) in the field. In this scope, shear strength and liquidity index parameters were used to classify the SPT-N values by taking the classification system of Terzaghi and Peck (1967) into consideration. The results showed that the input parameters were successful for classifying the SPT-N value to an acceptable degree of strength attribute. Therefore, in cases where the SPT tests are unreliable or could not be performed, laboratory tests on undisturbed specimens can give valuable information regarding the consistency and SPT-N value of the soil specimen under investigation. Data in this study is based on several tests that were conducted in a region; nevertheless, it is advised that the results of this study should be evaluated using global data.
4 citations
Cites background from "Foundation analysis and design"
...fects, and so on, are effective on the behavior of these soils, local correlations tend to isolate these effects (Bowles, 1996; Das, 2001)....
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...E-mail: alper.sezer@ege.edu.tr 55 fects, and so on, are effective on the behavior of these soils, local correlations tend to isolate these effects (Bowles, 1996; Das, 2001)....
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TL;DR: In this article, the effect of hydrodynamic forces and nonlinear soil-structure interactions (SSI) on the seismic response of a representative elevated aqueduct model was investigated.
Abstract: In conventional design of an elevated aqueduct, apart from considering the weight of water inside the channels, hydrodynamic forces are generally neglected. In a few special cases involving high seismic zones, hydrodynamic forces have been modeled considering equivalent lumped-mass type idealization or other models. For support conditions, either the base is considered as fixed or in a few cases, equivalent spring-dashpot system is considered. However, during an intense seismic event, nonlinear soil-structure interactions (SSI) may alter the response of the aqueduct significantly. This paper investigates the effect of hydrodynamic forces and SSI on seismic response of a representative elevated aqueduct model. Different modeling concepts of SSI has been adopted and the responses are compared. Frequency domain stochastic response analysis as well as time-history analysis with a series of ground motions of varying hazard levels have been performed. Demand parameters such as base shear and drift ratio are studied for varying heights of water in channels and different site conditions. From the frequency domain analysis, the effect of convective masses is found to be significant. From the time history analysis, the overall effect of increase in height of water is found to be negligible for nonlinear base case unlike the fixed and elastic base cases. For the nonlinear base condition, the base shear demand is found to decrease and the drift ratio is found to increase when compared to the results of linear base condition. The results of this study provide a better understanding of seismic behavior of an elevated aqueduct under various modeling assumptions and input excitations.
4 citations
Additional excerpts
...Table 2 Soil parameters (Bowles 1988) Soil type Poison0sratio ðmÞ Shear wave velocity (Vs, m/s) Density (q, kg/m3) Elastic modulus (Es, 106 N/m2) Cohesion (c, N/m2) Soft 0.2 100 1750 25 25,000 Medium 0.325 200 1950 50 75,000 Firm 0.4 300 2250 100 150,000 Fig....
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01 Jan 2005
TL;DR: In this paper, a correlation between the bearing capacity of a gypsiferous subgrade soil with the corresponding CBR value was presented. But this correlation was not applied to the geotechnical tests carried out on this soil.
Abstract: Presented in this paper is a correlation between the bearing capacity of a gypsiferous subgrade soil with the corresponding CBR value. The geotechnical tests carried out on this soil indicate that ...
4 citations
Cites methods from "Foundation analysis and design"
...The Terzaghi's bearing capacity equation for circular foundation under centric loading, as given by Bowles (1988) is qu = 1.3 c NC + po Nq + 0.3 γ B Nγ (2) where: qu = Terzaghi's ultimate bearing capacity, c= Soil cohesion, γ= Unit weight of soil (when the water table is above the underside of the…...
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TL;DR: In this paper, a laminar box equipped with a set of springs and a pneumatic loading system was designed and developed to run a total of nine scaled-down model tests at normal gravity on five different testing programs: wall thickness variation, wall modulus variation, effect of the reinforcement, wall bending stiffness, and wall volume control of varying wall slenderness.
4 citations
TL;DR: In this paper, the general anisotropic and angularly inhomogeneous wedge under a monomial type of distributed loading of order n of, the radial coordinate r at its external faces is considered.
Abstract: In this study, the generally anisotropic and angularly inhomogeneous wedge under a monomial type of distributed loading of order n of, the radial coordinate r at its external faces is considered. At first, using variable separable relations in the equilibrium equations, the strain–stress relations and the strain compatibility equation, a differential system of equations, is constructed. Decoupling this system, an ordinary differential equation is derived and the stress and displacement fields may be determined. The proposed procedure is also applied to the elastostatic problem of an isotropic and angularly inhomogeneous wedge. The special cases of loading of order n=−1 and n=−2, where the self-similarity approach is not valid, are examined and the stress and displacements fields are derived. Applications are presented for the cases of an angularly inhomogeneous wedge and in the case of a bi-material isotropic wedge.
4 citations