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
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TL;DR: In this paper, a series of charts, based on extensive finite element parametric studies along with nonlinear regression analysis of FE simulation results, are presented for estimating the subgrade reaction modulus (or initial tangent to the p-y curve) using five elastic constants of a transversely isotropic rock mass.
Abstract: Most of the rock medium possesses intrinsic grain orientation or preferred bedding and joint directions, thus requiring the use of at least transverse isotropy to describe its elastic behavior. This paper presents a series of charts, based on extensive finite element parametric studies along with nonlinear regression analysis of FE simulation results, for estimating the subgrade reaction modulus (or initial tangent to the p-y curve) using five elastic constants of a transversely isotropic rock mass. The proper characterization of subgrade reaction modulus is critical for accurate prediction of the elastic lateral deflection of a rock socketed drilled shaft under the applied lateral loads. The sensitivity of the response of a laterally loaded drilled shaft to the degree of anisotropy and orientation of the plane of anisotropy (bedding plane direction of the rock medium) was demonstrated in this paper for an actual lateral load testing case in Ohio. It is highly recommended to use five elastic constants to estimate subgrade reaction modulus of rock medium exhibiting high degree of cross anisotropy.
7 citations
TL;DR: In this paper, the authors analyzed the link between soil and foundation types in three different parts of Iraq (Mosul, Baghdad and Basra) using "STAAD" software in these regions.
Abstract: Foundation is considered as one of the main parts of any structure. The type of foundation used is highly dependent on the type and properties of soil. The design of foundations requires many factors that should be defined. There are number of differences in the geological and soil conditions in Iraq. As a consequence, these differences are reflected on the type of foundation to be used. Despite these differences, same materials and style of buildings are used all over Iraq. The main problems of Iraqi soil are high gypsum content, salinity and shallow water table depth. These factors that influence the foundations are the soil properties and the amount of loads that transmitted by the superstructure. The situation has been analysed through a case study which illustrated the link between soil and foundation types in three different parts of Iraq (Mosul, Baghdad and Basra). One building was analysed using "STAAD (structural analysis and design). Pro" software in these regions. It is evident that Iraqi designers and engineers require local code to define all the loads, materials and design of the foundation to be used. The use of local materials might be very effective from both engineering and economic perspectives.
7 citations
Cites background from "Foundation analysis and design"
...As a consequence, these differences are reflected on the type of foundation to be used....
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...Soil in this area is limy and sandy in southerly part and sandy dune in eastern part....
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TL;DR: In this article, a stochastic finite element analysis procedure for metal plate-connected wood trusses was developed. But the results of the analysis were limited to the first four moments of nodal deflection and member end forces.
Abstract: A stochastic finite element analysis procedure for metal plate‐connected wood trusses has been developed. The probabilistic analysis uses a deterministic analysis with a metal plate‐connection model that was developed for this study. The structural anlaysis uses beam‐column elements to model the wood members. The metal plate connections are modeled using semi‐rigid connection elements. Results from the deterministic analysis compared well to full‐scale truss tests performed at the Small Homes Council. The stochastic analysis uses first‐order statistical methods to obtain the first four moments of nodal deflections and member end forces. This analysis was compared to Monte Carlo simulation results. The first three statistical moments exhibit a good match to the simulation results. The fourth moment results are inadequate.
7 citations
TL;DR: A geotechnical and geological investigation of the Farallon Islands low-level radioactive waste disposal area was conducted to qualitatively assess the host sediments' relative effectiveness as a barrier to radionuclide migration, to estimate the portion of the barrier that is in contact with the waste packages at the three primary disposal sites, and to provide a basic physical description of the sediments.
Abstract: A geotechnical and geological investigation of the Farallon Islands low‐level radioactive waste (LLW) disposal area was conducted to qualitatively assess the host sediments’ relative effectiveness as a barrier to radionuclide migration, to estimate the portion of the barrier that is in contact with the waste packages at the three primary disposal sites, and to provide a basic physical description of the sediments. Box cores recovered from within the general disposal area at depths of 500, 1,000, and 1,500 m were subcored to provide samples (≍30 cm in length) for detailed descriptions, textural and mineralogical analyses, and a suite of geotechnical tests (index property, CRS consolidation, and CIU triaxial compression). The sediments are coarse, consisting chiefly of sands and silts, yet are highly plastic and compressible at the two deeper stations. Although they are very soft (vane shear strengths typically ≤ 1 kPa in the top 20 cm), all sediments exhibit overconsolidated behavior. The very low...
7 citations
Dissertation•
08 Jul 2011
7 citations
Cites background from "Foundation analysis and design"
...250 Boring number per unit area Several authors (Sowers and Sowers, 1970; Das, 1997; Bowles, 1996; Henry, 1986; NAVFAC DM-7.1, 1982) have proposed a minimum of 15-meter boring spacing for rigid frame structures....
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...Some authors (Das, 1997; Bowles, 1996; Henry, 1986; NAVFAC DM-7.1, 1982) suggested that at least one boring at each corner of a proposed multi-story building plan should be performed....
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...Several authors (Sowers and Sowers, 1970; Das, 1997; Bowles, 1996; Henry, 1986; NAVFAC DM-7.1, 1982) have proposed a minimum of 15-meter boring spacing for rigid frame structures....
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...249 Several authors (Das, 1997; Bowles, 1996; Henry, 1986; NAVFAC DM-7.1, 1982) have suggested that at least one boring at each corner of a proposed multi-story building plan should be performed....
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